PATENT ABSTRACT
A wireless communicator including a housing, wireless communication functionality located within the housing, native user interface functionality cooperating with the wireless communication functionality and including user interface surfaces located on at least one outer facing surface of the housing, and pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing in a pouch of an enhanced function device for automatically causing the wireless communication functionality to adapt to interoperation with parenting user interface functionality forming part of the enhanced function device at least partially instead of with the native user interface functionality. A method is also described and claimed.

PATENT DESCRIPTION
PRIORITY REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of assignee&#39;s application U.S. Ser. No. 12/525,820, now U.S. Pat. No. 8,180,395, filed on Aug. 5, 2009 which is a 371 of PCT/IL2008/000164 Feb. 6, 2008 by inventors Dov Moran, Itay Sherman, Eyal Bychkov, Itay Cohen, Yaron Segalov, Tamir Demri, Eran Miller, Uri Ron, Tal Engelstein, Hagay Katz and Hagit Perry, entitled MODULAR WIRELESS COMMUNICATOR. 
     This application claims benefit of the following U.S. patent applications, commonly owned by assignee:
     U.S. Provisional Application No. 60/901,353, entitled CELLULAR MODEM ON SD CARD, filed on Feb. 13, 2007 by inventors Itay Sherman, Adar Azancot and Lior Storfer;   U.S. Provisional Application No. 60/901,368, entitled INTERFACE FOR EXTENDING FUNCTIONALITY OF MEMORY CARDS, filed on Feb. 13, 2007 by inventor Itay Sherman;   U.S. Provisional Application No. 60/918,943, entitled COMPACT KEY PAD, filed on Mar. 20, 2007 by inventors Adar Azancot, Yaron Segalov, Eran Miller and Itay Sherman;   U.S. Provisional Application No. 60/918,966, entitled REDUCING POWER DISSIPATION FOR SOLID STATE DISKS, filed on Mar. 20, 2007 by inventor Itay Sherman;   U.S. Provisional Application No. 60/918,967, entitled DEVICE REGISTRATION OVER A COMPUTER NETWORK, filed on Mar. 20, 2007 by inventor Itay Sherman;   U.S. Provisional Application No. 60/918,968, entitled INTEGRATED COMMUNICATION AND STORAGE SUB-SYSTEM FOR EMBEDDED SYSTEMS, filed on Mar. 20, 2007 by inventor Itay Sherman;   U.S. Provisional Application No. 60/919,112 entitled PEER-TO-PEER FILE SHARING USING SHORT RANGE RF, filed on Mar. 20, 2007 by inventors Yaron Segalov and Eyal Bychkov;   U.S. Provisional Application No. 60/919,243, entitled INTEGRATED CELLULAR PHONE AND CORDLESS PHONE, filed on Mar. 21, 2007 by inventors Eyal Bychkov, Itay Sherman, Adar Azancot and Hagay Katz;   U.S. Provisional Application No. 60/920,037, entitled SYNCHRONIZED MEDIA PLAYERS WITHIN A SINGLE HOUSING, filed on Mar. 26, 2007 by inventor Itay Sherman;   U.S. Provisional Application No. 60/933,780, entitled ADAPTIVE USER INTERFACE FOR A MULTI-SOURCE SYSTEM, filed on Jun. 8, 2007 by inventors Itay Sherman, Eyal Bychkov and Yaron Segalov;   U.S. Provisional Application No. 60/933,792, entitled SD SWITCH BOX IN A CELLULAR HANDSET, filed on Jun. 8, 2007 by inventors Itay Sherman, Eyal Bychkov and Yaron Segalov;   U.S. Provisional Application No. 60/933,793, entitled COMMUNICATION CARD WITH THREE OPERATIONAL STATES, filed on Jun. 8, 2007 by inventors Itay Sherman, Itay Cohen and Yaron Segalov;   U.S. Provisional Application No. 60/964,233, entitled CALL SHUFFLING, filed on Aug. 9, 2007 by inventors Itay Sherman, Eyal Bychkov, Hagit Perry and Uri Ron;   U.S. Provisional Application No. 60/964,872, entitled COUNTER-TACTILE KEYPAD, filed on Aug. 14, 2007 by inventors Eyal Bychkov and Hagay Katz;   U.S. Provisional Application No. 60/995,575, entitled AUTOMATED CONSUMER ELECTRONICS DEVICE REPORTING, filed on Sep. 26, 2007, by inventors Itay Sherman, Eyal Bychkov, UN Ron, Hagay Katz and Hagit Perry;   U.S. Provisional Application No. 61/009,523, entitled MULTI-TAPPING NUMPAD, filed on Dec. 28, 2007 by inventor UN Ron;   U.S. Provisional Application No. 61/062,171, entitled MODULAR WIRELESS COMMUNICATOR, filed on Jan. 23, 2008 by inventors Itay Sherman, Eyal Bychkov, Itay Cohen, Tamir Demri, Hagay Katz, Eran Miller, Hagit Perry, Uri Ron and Yaron Segalov;   U.S. Provisional Application No. 61/063,668, entitled MODULAR WIRELESS COMMUNICATOR, filed on Feb. 5, 2008 by inventors Dov Moran, Itay Sherman, Eyal Bychkov, Itay Cohen, Yaron Segalov, Tamir Demri, Eran Miller, Uri Ron, Hagay Katz and Hagit Perry;   U.S. application Ser. No. 11/725,691, entitled INTERFACE FOR EXTENDING FUNCTIONALITY OF MEMORY CARDS, filed on Mar. 20, 2007 by inventors Itay Sherman and Yaron Segalov;   U.S. application Ser. No. 11/827,525, entitled SD SWITCH BOX IN A CELLULAR HANDSET, filed on Jul. 11, 2007 by inventors Itay Sherman, Eyal Bychkov and Yaron Segalov;   U.S. application Ser. No. 11/827,604, entitled COMMUNICATION CARD WITH THREE OPERATIONAL STATES, filed on Jul. 11, 2007 by inventors Itay Sherman, Itay Cohen and Yaron Segalov;   U.S. application Ser. No. 11/827,701, entitled SMALL REMOVABLE AUDIO PLAYER THAT ATTACHES TO A HOST MEDIA PLAYER, filed on Jul. 13, 2007 by inventor Itay Sherman;   U.S. application Ser. No. 11/891,777, entitled ADJUSTABLE CUT-OFF VOLTAGE FOR MOBILE DEVICE BATTERY, filed on Aug. 13, 2007 by inventors Itay Sherman, Eyal Bychkov, Eran Miller and Uri Ron;   U.S. application Ser. No. 11/893,837, entitled METHOD AND SYSTEM FOR REMOTE DIAGNOSTICS, filed on Aug. 16, 2007 by inventors Hagay Katz, Eyal Bychkov and Itay Sherman;   U.S. application Ser. No. 11/893,958, entitled COMMUNICATION LAYER SWITCHING DEVICE, filed on Aug. 16, 2007 by inventors Itay Sherman, Eyal Bychkov and Uri Ron;   U.S. application Ser. No. 11/975,489, entitled SYSTEM AND METHOD FOR PREDICTING TEXT, filed on Oct. 19, 2007 by inventors Hagit Perry and Uri Ron;   U.S. application Ser. No. 11/983,444, entitled UNSUCCESSFUL CALL ALERT, filed on Nov. 9, 2007 by inventors Eyal Bychkov and Uri Ron;   U.S. application Ser. No. 11/986,600, entitled SYSTEM AND METHOD FOR PREDICTING TEXT, filed on Nov. 21, 2007 by inventors Hagit Perry and Uri Ron;   U.S. application Ser. No. 11/986,242, entitled MULTIMEDIA ENHANCEMENT CHANNEL, filed on Nov. 19, 2007 by inventors Itay Sherman and Eyal Bychkov;   U.S. application Ser. No. 11/975,854, entitled REDUCING POWER DISSIPATION FOR SOLID STATE DISKS, filed on Oct. 22, 2007 by inventor Itay Sherman;   U.S. application Ser. No. 11/986,637, entitled UNIQUELY IDENTIFIABLE KEYS FOR ELECTRONIC KEYBOARDS, filed on Nov. 23, 2007 by inventors Uri Ron, Eyal Bychkov and Itay Sherman;   U.S. application Ser. No. 12/008,499, entitled BI-DIRECTIONAL BATTERY CHARGING FOR COUPLED ELECTRONIC DEVICES, filed on Jan. 11, 2008 by inventors Itay Sherman and Tamir Demri;   U.S. application Ser. No. 12/008,501, entitled BRIDGE DESIGN FOR SD AND MMC DATA BUSES, filed on Jan. 11, 2008 by inventor Itay Sherman;   U.S. application Ser. No. 12/008,582, entitled AUDIO AND USB MULTIPLEXING, filed on Jan. 11, 2008 by inventors Itay Sherman and Eran Miller; and   U.S. application Ser. No. 12/009,228, entitled CONTENT DELIVERY DURING CALL IDLE TIME, filed on Jan. 17, 2008 by inventors Eyal Bychkov and Uri Ron.   

    
    
     FIELD OF THE INVENTION 
     The field of the present invention is wireless communication. 
     SUMMARY OF THE DESCRIPTION 
     Aspects of the present invention relate to a modular wireless communicator that may be coupled with an enhanced function device in a manner referred to herein as pouching. Pouching is defined herein to mean inserting the wireless communicator device inside of the enhanced function device so that the wireless communicator is at least partially obscured by the enhanced function device, and such that the enhanced function device mechanically supports the wireless communicator. 
     There is thus provided in accordance with an embodiment of the present invention a wireless communicator including a housing, wireless communication functionality located within the housing, native user interface functionality cooperating with the wireless communication functionality and including user interface surfaces located on at least one outer facing surface of the housing, and pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing in a pouch of an enhanced function device for causing the wireless communication functionality to adapt to cooperating with parenting user interface functionality forming part of the enhanced function device at least partially instead of with the native user interface functionality. 
     Additionally in accordance with an embodiment of the present invention the wireless communication functionality includes a phone call dialing functionality. 
     Further in accordance with an embodiment of the present invention the wireless communication functionality includes a network access functionality. 
     Yet further in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality automatically causes the wireless communication functionality to adapt to cooperating with the parenting user interface functionality when the housing is oriented in the pouch of the enhanced function device. 
     Moreover in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality causes the wireless communication functionality to adapt to cooperating with the parenting user interface functionality, when manually prompted to do so and when the housing is oriented in the pouch of the enhanced function device. 
     Additionally in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality includes alien rejection functionality operative to prevent cooperation of the wireless communication functionality with user interface functionality of an alien enhanced function device notwithstanding existence of pouching orientation of the housing in a pouch of the alien enhanced function device. 
     Further in accordance with an embodiment of the present invention the adaptation to interoperation includes transmission from the enhanced function device to the wireless communicator of information relating to parenting user interface functionality forming part of the enhanced function device, and configuration of the wireless communication functionality to be controlled by the parenting user interface functionality forming part of the enhanced function device at least partially instead of by the native user interface functionality. 
     Yet further in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality causes the wireless communicator to transmit user interface data from the wireless communicator to the enhanced function device in conformance with the information relating to parenting user interface functionality. 
     Moreover in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality expands the functionality of the wireless communicator, in addition to causing the wireless communication functionality to adapt to cooperating with the parenting user interface functionality. 
     Additionally in accordance with an embodiment of the present invention the enhanced function device expands the functionality of the wireless communicator by enabling access to functionality of the wireless communicator that is inaccessible when the wireless communicator is not pouched with the enhanced function device. 
     Further in accordance with an embodiment of the present invention the enhanced function device provisions software to the wireless communicator when the wireless communicator is pouched with the enhanced function device. 
     Yet further in accordance with an embodiment of the present invention the enhanced function device includes a subscriber identifier, which enables wireless network connectivity that is inaccessible to the wireless communicator when the wireless communicator is not pouched with the enhanced function device. 
     Moreover in accordance with an embodiment of the present invention the subscriber identifier is a SIM card. 
     Additionally in accordance with an embodiment of the present invention the housing includes an at least partially transparent portion in an outer facing surface, the wireless communicator further includes at least one light source fastened inside of the housing, the light source indicates when the wireless communicator is sufficiently pouched with the enhanced function device so as to activate the pouching responsive electrical interconnection functionality, and the light of the at least one light source shines through the at least partially transparent portion of the housing. 
     Moreover in according to an embodiment of the present invention said portion is a hole in the housing. 
     Further in accordance with an embodiment of the present invention the light source is an LED light. 
     Yet further in accordance with an embodiment of the present invention the light source indicates a state of the wireless communicator. 
     Moreover in accordance with an embodiment of the present invention the light source indicates a battery status of the wireless communicator. 
     Additionally in accordance with an embodiment of the present invention the light source indicates a reception strength of the wireless communicator. 
     Further in accordance with an embodiment of the present invention the light source indicates an operational mode of the wireless communication functionality. 
     Yet further in accordance with an embodiment of the present invention the light source indicates when the wireless communication functionality is in audio conversation operational mode. 
     Moreover in accordance with an embodiment of the present invention the light source indicates when the wireless communication functionality is in video operational conversation mode. 
     Additionally in accordance with an embodiment of the present invention the light source indicates when a new message has been received. 
     Further in accordance with an embodiment of the present invention the light source indicates when a new message has been sent. 
     Yet further in accordance with an embodiment of the present invention said message is a text message. 
     Moreover in accordance with an embodiment of the present invention said message is a multimedia message. 
     Additionally in accordance with an embodiment of the present invention said message is an email message. 
     Further in accordance with an embodiment of the present invention the light source indicates when the wireless communicator has an incoming phone call. 
     Moreover in accordance with an embodiment of the present invention the light source indicates a status of the enhanced function device when the wireless communicator is pouched therewith. 
     Additionally in accordance with an embodiment of the present invention the light source indicates an operational mode of the enhanced function device when the wireless communicator is pouched therewith. 
     Further in accordance with an embodiment of the present invention the housing includes an at least partially transparent portion in an outer facing surface, the wireless communication functionality includes an antenna fastened inside of the housing, for receiving and transmitting radio signals, the antenna includes an antenna hole in an outer facing surface, the antenna hole is aligned with the at least partially transparent portion of the housing, the wireless communicator further includes a light source fastened inside of the housing, the light source indicates when the wireless communicator is sufficiently pouched with the enhanced function device so as to activate the pouching responsive electrical interconnection functionality, and the light of the light source shines through the antenna hole and through the at least partially transparent portion in the housing. 
     Yet further n accordance with an embodiment of the present invention the native user interface functionality includes at least one of a keyboard, a display, a microphone, an earpiece, a headset port, a speaker and a vibrator. 
     Moreover in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing in the pouch of the enhanced function device restricts the wireless communication functionality from using at least a portion of the native user interface functionality. 
     Additionally in accordance with an embodiment of the present invention the wireless communication functionality includes a phone call dialing functionality, and the pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing in the pouch of the enhanced function device restricts the dialing functionality. 
     Further in accordance with an embodiment of the present invention the wireless communication functionality includes a network access functionality, and the pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing in said pouch of the enhanced function device restricts the network access functionality. 
     There is yet further provided in accordance with an embodiment of the present invention an enhanced function device for use with a wireless communicator including a housing, wireless communication functionality located within the housing and native user interface functionality cooperating with the wireless communication functionality, the enhanced function device including a pouch, parenting user interface functionality, and pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing of the wireless communicator in the pouch for causing the wireless communication functionality to adapt to cooperating with the parenting user interface functionality at least partially instead of with the native user interface functionality. 
     Moreover in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality automatically causes the wireless communication functionality to adapt to cooperating with the parenting user interface functionality when the housing is oriented in the pouch of the enhanced function device. 
     Additionally in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality causes the wireless communication functionality to adapt to cooperating with the parenting user interface functionality, when manually prompted to do so and when the housing is oriented in the pouch of the enhanced function device. 
     Further in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality includes alien rejection functionality operative to prevent cooperation of an alien wireless communicator with the parenting user interface functionality of the enhanced function device notwithstanding existence of pouching orientation of the alien wireless communicator in the pouch of the enhanced function device. 
     Yet further in accordance with an embodiment of the present invention the enhanced function device is able to operate when the wireless communicator is not pouched therewith. 
     Moreover in accordance with an embodiment of the present invention the enhanced function device is not able to operate unless the wireless communicator is pouched therewith. 
     Additionally in accordance with an embodiment of the present invention the enhanced function device includes a non-volatile storage positioned within the housing, for storing information relating to parenting user interface functionality, and a controller positioned within the housing for transmitting from the enhanced function device to the wireless communicator the information relating to parenting user interface functionality, when the wireless communicator is pouched with the enhanced function device. 
     Further in accordance with an embodiment of the present invention the parenting user interface functionality includes at least one of a keyboard, a display, a microphone, a speaker, a headset port and an earpiece. 
     There is yet further provided in accordance with an embodiment of the present invention a wireless communication system including a wireless communicator, including a housing, wireless communication functionality located within the housing, native user interface functionality cooperating with the wireless communication functionality and including user interface surfaces located on at least one outer facing surface of the housing, and pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing in a pouch of an enhanced function device for automatically causing the wireless communication functionality to adapt to cooperating with parenting user interface functionality forming part of the enhanced function device at least partially instead of with the native user interface functionality, and an enhanced function device, including a pouch, parenting user interface functionality, and pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing of the wireless communicator in the pouch for automatically causing the wireless communication functionality to adapt to cooperating with the parenting user interface functionality at least partially instead of with the native user interface functionality. 
     Moreover in accordance with an embodiment of the present invention the wireless communication functionality includes a phone call dialing functionality. 
     Additionally in accordance with an embodiment of the present invention the wireless communication functionality includes a network access functionality. 
     Further in accordance with an embodiment of the present invention the system includes alien rejection functionality operative to prevent cooperation between mutually alien wireless communication functionality and enhanced user interface functionality of a wireless communicator and an enhanced function device which are mutually alien notwithstanding existence of pouching orientation of said housing in a pouch of said enhanced function device. 
     Yet further in accordance with an embodiment of the present invention the wireless communication system includes connector circuitry connecting the wireless communicator with the enhanced function device when the wireless communicator is pouched with the enhanced function device, wherein the connector circuitry enables the wireless communicator to detect whether or not the wireless communicator is pouched with the enhanced function device. 
     Alternatively in accordance with an embodiment of the present invention the wireless communication system includes connector circuitry connecting the wireless communicator with the enhanced function device when the wireless communicator is pouched with the enhanced function device, wherein the connector circuitry enables the wireless communicator to determine, whether the enhanced function device is able to operate when the wireless communicator is not pouched therewith, or else is unable to operate unless the wireless communicator is pouched therewith. 
     Additionally in accordance with an embodiment of the present invention the wireless communicator functions as a master when pouched with the enhanced function device if the wireless communicator determines that the enhanced function device is unable to operate unless the wireless communicator is pouched therewith. 
     Further in accordance with an embodiment of the present invention the wireless communicator functions as a slave when pouched with the enhanced function device if the wireless communicator determines that the enhanced function device is able to operate when the wireless communicator is not pouched therewith. 
     Yet further in accordance with an embodiment of the present invention the wireless communication system includes connector circuitry connecting the wireless communicator with the enhanced function device when the wireless communicator is pouched with the enhanced function device, where the connector circuitry enables the enhanced function device to power the wireless communicator on and off when the enhanced function device is respectively powered on and off. 
     Moreover in accordance with an embodiment of the present invention the wireless communicator and the enhanced function device each includes a rechargeable battery, the wireless communicator system including connector circuitry connecting the wireless communicator with the enhanced function device when the wireless communicator is pouched with the enhanced function device, wherein the connector circuitry enables each of the rechargeable batteries to supply power to both the wireless communicator and the enhanced function device. 
     Additionally in accordance with an embodiment of the present invention the wireless communicator and the enhanced function device each includes a rechargeable battery, the wireless communicator system including connector circuitry connecting the wireless communicator with the enhanced function device when the wireless communicator is pouched with the enhanced function device, wherein the connector circuitry enables each of the rechargeable batteries to charge the other rechargeable battery. 
     Further in accordance with an embodiment of the present invention the wireless communicator includes a mailbox for receiving data from the enhanced function device and for transmitting data to the enhanced function device, when the wireless communicator is pouched with the enhanced function device. 
     Yet further in accordance with an embodiment of the present invention the wireless communicator pouching responsive electrical interconnection functionality is operative to wirelessly transmit a report about the enhanced function device to a remote recipient. 
     Moreover in accordance with an embodiment of the present invention the enhanced function device is an electronic appliance. 
     Additionally in accordance with an embodiment of the present invention the report is an appliance registration report. 
     Further in accordance with an embodiment of the present invention the report is an appliance diagnostic report. 
     Yet further in accordance with an embodiment of the present invention the enhanced function device includes a media playing module for playing digital media files, and a storage unit for storing digital media files, and wherein the parenting user interface functionality includes functionality for navigating and playing digital media files stored in the storage unit, and wherein the wireless communicator further includes a storage unit for storing digital media files, and a controller for storing incoming media files in the storage unit and for selectively copying media files from the storage unit to the enhanced function device storage unit when the wireless communicator is pouched in the enhanced function device. 
     Moreover in accordance with an embodiment of the present invention the wireless communicator includes an audio playing module for playing digital audio files, and the enhanced function device includes a controller for selectively copying media files from the enhanced function device storage unit to the wireless communicator storage unit when the wireless communicator is pouched in the enhanced function device. 
     Additionally in accordance with an embodiment of the present invention the parenting user interface functionality includes functionality for navigating and playing digital media files stored in the wireless communicator storage unit. 
     There is further provided in accordance with an embodiment of the present invention a method for a pouchable wireless communicator, the wireless communicator having a native user interface, including in response to orienting the wireless communicator in a pouch of an enhanced function device, adapting the wireless communicator to conform with a parent user interface forming part of the enhanced function device at least partially instead of with the native user interface. 
     Yet further in accordance with an embodiment of the present invention the method includes preventing the wireless communicator from adapting to conform with an alien enhanced function device, notwithstanding the wireless communicator being oriented in a pouched of the alien enhanced function device. 
     Moreover in accordance with an embodiment of the present invention the method includes mutually transmitting from the enhanced function device to the wireless communicator information relating to the parent user interface of the enhanced function device, and configuring the wireless communicator to conform with the parent user interface forming part of the enhanced function device at least partially instead of with the native user interface. 
     Additionally in accordance with an embodiment of the present invention the method includes transmitting user interface data from the wireless communicator to the enhanced function device in conformance with the information relating to the parent user interface. 
     Further in accordance with an embodiment of the present invention the native user interface functionality includes at least one of a keyboard, a display, a microphone, an earpiece, a headset port, a speaker and a vibrator. 
     Yet further in accordance with an embodiment of the present invention adapting the wireless communicator to conform with a parent user interface includes restricting the wireless communicator from using at least a Portion of its native user interface. 
     There is moreover provided in accordance with an embodiment of the present invention a method for using a wireless communicator, the wireless communicator having a native user interface, including in response to orienting the wireless communicator in a pouch of an enhanced function device, causing the wireless communicator to adapt to conform with a parent user interface of the enhanced function device at least partially instead of with the native user interface. 
     Additionally in accordance with an embodiment of the present invention the enhanced function device is able to operate when the wireless communicator is not pouched therewith. 
     Further in accordance with an embodiment of the present invention the enhanced function device is not able to operate unless the wireless communicator is pouched therewith. 
     Yet further in accordance with an embodiment of the present invention the parenting user interface functionality includes at least one of a keyboard, a display, a microphone, a speaker, a headset port and an earpiece. 
     There is moreover provided in accordance with an embodiment of the present invention a method for wireless communication including in response to orienting a wireless communicator having a native user interface in a pouch of an enhanced function device, adapting the wireless communicator to conform with a parent user interface forming part of the enhanced function device at least partially instead of with the native user interface, and in response to orienting the wireless communicator in the pouch of the enhanced function device, causing the wireless communicator to adapt to conform with the parent user interface of the enhanced function device at least partially instead of with the native user interface. 
     Additionally in accordance with an embodiment of the present invention the method includes detecting whether or not the wireless communicator is pouched with the enhanced function device. 
     Alternatively in accordance with an embodiment of the present invention the method includes determining whether the enhanced function device is able to operate when the wireless communicator is not pouched therewith, or else is unable to operate unless the wireless communicator is pouched therewith. 
     Yet further in accordance with an embodiment of the present invention the method includes controlling the wireless communicator to function as a master when pouched with the enhanced function device if the determining determines that the enhanced function device is unable to operate unless the wireless communicator is pouched therewith. 
     Moreover in accordance with an embodiment of the present invention the method includes controlling the wireless communicator to function as a slave when pouched with the enhanced function device if the determining determines that the enhanced function device is able to operate when the wireless communicator is not pouched therewith. 
     Additionally in accordance with an embodiment of the present invention the method includes powering the wireless communicator on and off, by the enhanced function device, when the enhanced function device is respectively powered on and off. 
     Further in accordance with an embodiment of the present invention the method includes supplying power to both the wireless communicator and the enhanced function device by a rechargeable battery in the wireless communicator. 
     Yet further in accordance with an embodiment of the present invention the method includes supplying power to both the wireless communicator and the enhanced function device by a rechargeable battery in the enhanced function device. 
     Moreover in accordance with an embodiment of the present invention the method includes charging a rechargeable battery in the wireless communicator by a rechargeable battery in the enhanced function device. 
     Additionally in accordance with an embodiment of the present invention the method includes charging a rechargeable battery in the enhanced function device by a rechargeable battery in the wireless communicator. 
     Further in accordance with an embodiment of the present invention the method includes wirelessly transmitting, by the wireless communicator, a report about the enhanced function device to a remote recipient. 
     Yet further in accordance with an embodiment of the present invention the enhanced function device is an electronic appliance. 
     Moreover in accordance with an embodiment of the present invention the report is an appliance registration report. 
     Additionally in accordance with an embodiment of the present invention the report is an appliance diagnostic report. 
     Further in accordance with an embodiment of the present invention the wireless communicator and the enhanced function device each have storage units, and the parent user interface includes an interface for navigating and playing digital media files stored in the enhanced function device storage unit, the method including storing, by the wireless communicator, incoming media files in the wireless communicator storage unit, and selectively copying media files from the wireless communicator storage unit to the enhanced function device storage unit when the wireless communicator is pouched in the enhanced function device. 
     Yet further in accordance with an embodiment of the present invention the native user interface includes an interface for playing digital audio files stored in the wireless communicator storage unit, the method including selectively copying, by the enhanced function device, media files from the enhanced function device storage unit to the wireless communicator storage unit when the wireless communicator is pouched in the enhanced function device. 
     There is moreover provided in accordance with an embodiment of the present invention a wireless communication system including a plurality of wireless communicators, each wireless communicator including a housing, wireless communication functionality located within the housing, native user interface functionality cooperating with the wireless communication functionality and including user interface surfaces located on at least one outer facing surface of the housing, and pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing in a pouch of an enhanced function device for automatically causing the wireless communication functionality to adapt to interoperation with parenting user interface functionality forming part of the enhanced function device at least partially instead of with the native user interface functionality, and a plurality of distinguishable enhanced function devices, each enhanced function device including a pouch, parenting user interface functionality, and pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing of the wireless communicator in the pouch for automatically causing the wireless communication functionality to adapt to interoperation with the parenting user interface functionality at least partially instead of with the native user interface functionality, wherein the plurality of wireless communicator pouching responsive electrical interconnection functionalities and the plurality of enhanced function device pouching responsive electrical interconnection functionalities enable each wireless communicator to identify which of the plurality of distinguishable enhanced function devices it is pouched in. 
     Additionally in accordance with an embodiment of the present invention the wireless communication functionality wirelessly transmits to a remote recipient a report about an enhanced function device, when the wireless communicator identifies the enhanced function device as being pouched therewith. 
     Further in accordance with an embodiment of the present invention the plurality of wireless communicators includes GSM wireless communicators and CDMA wireless communicators. 
     There is yet further provided in accordance with an embodiment of the present invention a method for wireless communication including in response to orienting each of a plurality of wireless communicators having native user interfaces in a pouch of one of a plurality of distinguishable enhanced function devices adapting the wireless communicator to conform with a parent user interface forming part of the one enhanced function device at least partially instead of with the native user interface, and identifying which one of the plurality of distinguishable enhanced function devices the wireless communicator is pouched in, and in response to orienting each of the plurality of wireless communicators in the pouch of one of the plurality of enhanced function devices, causing the wireless communicator to adapt to conform with the parent user interface of the one enhanced function device at least partially instead of with the native user interface. 
     Moreover in accordance with an embodiment of the present invention the method includes wirelessly transmitting to a remote recipient, by the wireless communicator, a report about an enhanced function device, when the wireless communicator identifies the enhanced function device as being pouched therewith. 
     Additionally in accordance with an embodiment of the present invention the plurality of wireless communicators includes GSM wireless communicators and CDMA wireless communicators. 
     There is further provided in accordance with an embodiment of the present invention an enhanced function device for use with a plurality of wireless communicators, each wireless communicator including a housing, wireless communication functionality located within the housing, and native user interface functionality cooperating with the wireless communication functionality, the enhanced function device including parenting user interface functionality, a plurality of pouches, and pouching responsive electrical interconnection functionality responsive to pouching orientation of the housing of any specific one of the plurality of wireless communicator in a corresponding one of the plurality of pouches, for causing the wireless communication functionality of the specific wireless communicator to adapt to cooperating with the parenting user interface functionality at least partially instead of with the specific wireless communicator native user interface functionality. 
     Yet further in accordance with an embodiment of the present invention the pouching responsive electrical interconnection functionality causes the wireless communication functionality of at least two wireless communicators to simultaneously adapt to cooperating with the parenting user interface functionality at least partially instead of with the respective native user interface functionalities of the at least two wireless communicators, in response to pouching orientation of the housings of the at least two wireless communicators in corresponding at least two pouches. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will be more fully understood and appreciated from the following detailed description, taken in conjunction with the drawings in which: 
         FIG. 1  is a simplified illustration of a multifunctional multi-parent, pouchable communication system constructed and operative in accordance with an embodiment of the present invention; 
         FIG. 2A  is a simplified illustrations of various stages of pouching of a wireless communicator with a first enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 2B  is a simplified illustrations of various stages of pouching of a wireless communicator with a second enhanced function device in accordance with an embodiment of the present invention; 
         FIGS. 3A and 3B  are pictorial illustrations of an embodiment of a wireless communicator in accordance with an embodiment of the present invention; 
         FIGS. 4A and 4B  are pictorial illustrations of an embodiment of an enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 5  is a pictorial illustration of an embodiment of an internal antenna of the wireless communicator in accordance with an embodiment of the present invention; 
         FIG. 6  is a simplified block diagram illustration of the wireless communicator in accordance with an embodiment of the present invention; 
         FIG. 7A  is a simplified block diagram illustration of a first enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 7B  is a simplified block diagram illustration of a second enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 8A  is a simplified flow chart illustration of operation of the wireless communicator when pouched within the enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 8B  is a simplified diagram of logic for alien rejection for a wireless communicator and an enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 9  is a simplified block diagram of a pouching interface between the wireless communicator and the enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 10  is a simplified block diagram of the wireless communicator with three operational states in accordance with an embodiment of the present invention; 
         FIG. 11  is a simplified flowchart of a method for the wireless communicator to detect the type of enhanced function device it is pouched with in accordance with an embodiment of the present invention; 
         FIG. 12 , which is a simplified diagram of an SD card interface that provides extended functionality in accordance with the present invention; 
         FIG. 13  is a simplified illustration of an arrangement of clusters in an SD card file system in accordance with an embodiment of the present invention; 
         FIG. 14  is a simplified flowchart of a method for downloading a file from a remote server to the wireless communicator in accordance with an embodiment of the present invention; 
         FIGS. 15A-15D  are snapshots of a user interface and a file system for a simple example use case, during various stages of file download during operation of the method of  FIG. 14  in accordance with an embodiment of the present invention; 
         FIG. 16  is a simplified flowchart of a method for playing a streamed file from an SD card in accordance with an embodiment of the present invention; 
         FIG. 17  is a simplified flowchart of a method for playing a streamed file from the wireless communicator in accordance with an embodiment of the present invention; 
         FIG. 18  is an illustration of file streaming using a circular cluster cycle in the FAT in accordance with an embodiment of the present invention; 
         FIG. 19 , which is a simplified flowchart of a method for uploading a file from the wireless communicator to a remote server in accordance with an embodiment of the present invention; 
         FIGS. 20A and 20B , which are snapshots of a user interface and a file system for a simple example use case, during various stages of file upload during operation of the method of  FIG. 19  in accordance with an embodiment of the present invention; 
         FIGS. 21A and 21B , are displays of configuration screens for the enhanced function device and the wireless communicator, pouched together, controlled so as to have the same look &amp; feel, in accordance with an embodiment of the present invention; 
         FIGS. 22A and 22B , are displays of different configuration screens for the enhanced function device and the wireless communicator, pouched together, controlled so as to have the same look &amp; feel, in accordance with an embodiment of the present invention; 
         FIGS. 23A and 23B , are displays of yet different configuration screens for the enhanced function device and the wireless communicator, pouched together, controlled so as to have the same look &amp; feel, in accordance with an embodiment of the present invention; 
         FIG. 24  is a simplified block diagram of a system with a uniform interface for configuring the wireless communicator and the enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 25A  is a simplified flowchart of a first embodiment of a method for controlling a configuration interface for the wireless communicator so as to conform to the look &amp; feel of the parent user interface; in accordance with an embodiment of the present invention; 
         FIG. 25B , which is a simplified flowchart of a second embodiment of a method for controlling a configuration interface for the wireless communicator so as to conform to the look &amp; feel of the parent user interface in accordance with an embodiment of the present invention; 
         FIG. 25C  is a simplified flowchart of a third embodiment of a method for controlling a configuration interface for the wireless communicator so as to conform to the look &amp; feel of the parent user interface in accordance with an embodiment of the present invention; 
         FIG. 26  is an illustration of button keys that have different key assignments for parent mode and native mode, but a common look &amp; feel user interface for setting wireless communicator and enhanced function device configuration parameters in accordance with an embodiment of the present invention; 
         FIGS. 27A and 27B  are illustrations of handset body dressed up in jackets with two different parent user interface packages in accordance with an embodiment of the present invention; 
         FIG. 28  is a simplified diagram of a circuit that provides bi-directional power control, in accordance with an embodiment of the present invention; 
         FIG. 29 , which is a simplified block diagram of bi-directional battery charging for a simple enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 30  is a summary of bi-directional battery charging logic for the hardware of  FIG. 29  in accordance with an embodiment of the present invention; 
         FIG. 31  is a simplified block diagram of bi-directional battery charging for a complex enhanced function device in accordance with an embodiment of the present invention; 
         FIG. 32  is a summary of bi-directional battery charging logic for the hardware of  FIG. 31  in accordance with an embodiment of the present invention; 
         FIGS. 33A and 33B  are simplified diagrams of a switching circuit that distinguishes between twelve audio/USB configurations of in accordance with an embodiment of the present invention; 
         FIG. 34  is a simplified diagram of an electrical circuit that determines bus direction in bi-directional SD and MMC signal lines in accordance with an embodiment of the present invention; 
         FIG. 35  is a simplified flowchart of a method for determining bus direction in bi-directional SD and MMC signal lines in accordance with an embodiment of the present invention; 
         FIG. 36  is a sample simulation for A and B signals 110010101110111 and 0010111, respectively in accordance with an embodiment of the present invention; 
         FIG. 37  is a simplified diagram of an electrical circuit that determines bus direction in multiplexed directional SD and MMC signal lines in accordance with an embodiment of the present invention; 
         FIG. 38  is a simplified illustration of an exemplary GSM communication network, within which the wireless communicator transmits information about a consumer electronic (CE) device to remote sites in accordance with an embodiment of the present invention; 
         FIG. 39  is a simplified illustration of an exemplary Code Division Multiple Access (CDMA) communication network, within which the wireless communicator transmits information about a consumer electronic (CE) device to remote sites in accordance with an embodiment of the present invention; 
         FIG. 40  is a simplified illustration of an exemplary IEEE 802.11b WiFi communication network, within which the wireless communicator transmits information about a consumer electronic (CE) device to remote sites in accordance with an embodiment of the present invention; 
         FIG. 41  is a simplified flowchart of a method for automated consumer electronic device reporting, using the wireless communicator in accordance with an embodiment of the present invention; 
         FIG. 42  is a simplified illustration of a communications network with the wireless communicator that wirelessly transmits registration information about an appliance to one or both of a remote manufacturer and a remote seller in accordance with an embodiment of the present invention; 
         FIG. 43  is a simplified illustration of a communications network with the wireless communicator that wirelessly transmits diagnostic information about an appliance to one or more of a remote seller, a remote manufacturer and a remote service provider in accordance with an embodiment of the present invention; 
         FIG. 44  is a simplified flowchart of a method for registering electrical appliances using the wireless communicator in accordance with an embodiment of the present invention; 
         FIG. 45  is a simplified flowchart of a method for reporting diagnostics for electrical appliances using the wireless communicator in accordance with an embodiment of the present invention; 
         FIG. 46  is a simplified flow chart of a method for provisioning software and firmware updates to a plurality of jackets and appliances using the wireless communicator in accordance with an embodiment of the present invention. 
         FIG. 47  is a simplified block diagram of the wireless communicator with a pouching controller in accordance with a first embodiment of the present invention; 
         FIG. 48  is a simplified flowchart of a method for booting the wireless communicator&#39;s baseband modem, and for performing subsequent operations in accordance with an embodiment of the present invention; 
         FIG. 49  is a simplified flowchart of a method for communicating between the enhanced function host device and the wireless communicator&#39;s baseband modem, and accessing the SD storage, in accordance with an embodiment of the present invention; 
         FIG. 50A  is a simplified diagram illustrating a process of enabling a baseband modem to access SD storage, where a pouching controller coordinates between the baseband modem and enhanced function host device in accordance with a first embodiment of the present invention; 
         FIG. 50B  is a simplified diagram illustrating a process of enabling a baseband modem to access SD storage, where a pouching controller coordinates between the baseband modem and enhanced function host device in accordance with a second embodiment of the present invention; 
         FIG. 51  is a simplified flowchart of a method for a sleep mode in accordance with an embodiment of the present invention; 
         FIG. 52  is a simplified flowchart of a method for resuming operation after a sleep mode, in accordance with an embodiment of the present invention; 
         FIG. 53  is a simplified block diagram of a cellular handset, in accordance with a second embodiment of the present invention; 
         FIG. 54  is a simplified block diagram of a power management system, for preserving life of the battery in the wireless communicator in accordance with an embodiment of the present invention; 
         FIG. 55  is a simplified flowchart of a method for preserving life of a battery in the wireless communicator in accordance with an embodiment of the present invention; 
         FIG. 56  is a simplified state transition diagram for power modes of the wireless communicator in accordance with an embodiment of the present invention; 
         FIGS. 57A and 57B  are illustrations of the wireless communicator pouched with a USB jacket in accordance with an embodiment of the present invention; 
         FIG. 58  is a simplified block diagram of the wireless communicator and a USB jacket in accordance with an embodiment of the present invention; 
         FIG. 59  is a simplified block diagram of the wireless communicator and a USB jacket, in accordance with a second embodiment of the present invention; 
         FIGS. 60A and 60B  are simplified block diagrams of a modular audio player pouched with a digital media player in accordance with an embodiment of the present invention; 
         FIG. 61  is a simplified flowchart of a method for synchronizing media files between the host media player and the modular audio player, when the media files are received by the modular player in accordance with an embodiment of the present invention; 
         FIG. 62  is a simplified flowchart of a method for synchronizing media files between the host media player and the modular audio player, when the media files are received by the host player in accordance with an embodiment of the present invention; and 
         FIG. 63  is a simplified flowchart of operations carried out when the modular audio player is pouched with the host media player in accordance with an embodiment of the present invention. 
     
    
    
     For reference to the figures, the following index of elements and their numerals is provided. Elements numbered in the 100&#39;s generally relate to the wireless communicator, elements numbered in the 200&#39;s generally relate to the enhanced function device, elements numbered in the 400&#39;s-600&#39;s generally relate to pouch connection circuitry, elements numbered in the 300&#39;s and 700&#39;s-900&#39;s generally relate to wireless networks. Elements numbered in the 1000&#39;s-3000&#39;s are steps of flow charts. 
     
       
         
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
           
               
                   
                   
               
               
                   
                 Element 
                 Description 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 Elements generally related to the wireless communicator 
               
             
          
           
               
                   
                 100 
                 Wireless communicator 
               
               
                   
                 101 
                 Transparent portion of housing 
               
               
                   
                 102 
                 SD NAND controller 
               
               
                   
                 106 
                 UART port of pouching controller 
               
               
                   
                 107 
                 SD host port of pouching controller 
               
               
                   
                 108 
                 SD port of pouching controller 
               
               
                   
                 109 
                 SD host of modem 
               
               
                   
                 110 
                 Pouching controller 
               
               
                   
                 111 
                 SD host of pouching controller 
               
               
                   
                 112 
                 SD slave of pouching controller 
               
               
                   
                 113 
                 Management data channel 
               
               
                   
                 114 
                 Data channel bridge 
               
               
                   
                 115 
                 Storage 
               
               
                   
                 117 
                 Outgoing mailbox 
               
               
                   
                 118 
                 Incoming mailbox 
               
               
                   
                 120 
                 Modem 
               
               
                   
                 123 
                 Voltage boost 
               
               
                   
                 124 
                 Battery charger 
               
               
                   
                 125 
                 Power management subsystem 
               
               
                   
                 126 
                 Voltage level shifter 
               
               
                   
                 127 
                 On/off button 
               
               
                   
                 128 
                 On/off switch 
               
               
                   
                 130 
                 Audio/video subsystem 
               
               
                   
                 135 
                 Power amplifier 
               
               
                   
                 136 
                 RF interface 
               
               
                   
                 140 
                 Internal antenna 
               
               
                   
                 145 
                 Battery 
               
               
                   
                 146 
                 External power source 
               
               
                   
                 150 
                 Connector 
               
               
                   
                 155 
                 USB connector 
               
               
                   
                 156 
                 USB charger 
               
               
                   
                 160 
                 Pouch connector 
               
               
                   
                 161 
                 UART interface modem 
               
               
                   
                 162 
                 SD interface of modem 
               
               
                   
                 163 
                 Internal SRAM memory 
               
               
                   
                 164 
                 External memory interface 
               
               
                   
                 166 
                 External SDRAM memory 
               
               
                   
                 170 
                 Native user interface 
               
               
                   
                 171 
                 Microphone 
               
               
                   
                 173 
                 Earpiece 
               
               
                   
                 175 
                 Speaker 
               
               
                   
                 177 
                 Vibrator 
               
               
                   
                 180 
                 Keyboard 
               
               
                   
                 185 
                 Display 
               
               
                   
                 190 
                 SIM card 
               
             
          
           
               
                 Elements generally related to the enhanced function device 
               
             
          
           
               
                   
                 200 
                 Enhanced function device 
               
               
                   
                 200a 
                 Jacket 
               
               
                   
                 200b 
                 Host 
               
               
                   
                 200c 
                 Media player 
               
               
                   
                 205 
                 Host controller 
               
               
                   
                 205a 
                 Auxiliary processor for jacket 
               
               
                   
                 205b 
                 Host controller for host 
               
               
                   
                 207 
                 SD driver 
               
               
                   
                 208 
                 SD application 
               
               
                   
                 209 
                 SD host of host controller 
               
               
                   
                 210 
                 Pouching controller 
               
               
                   
                 210a 
                 Pouching controller for jacket 
               
               
                   
                 210b 
                 Pouching controller for host 
               
               
                   
                 210c 
                 Pouching controller for media player 
               
               
                   
                 211 
                 SD host of pouching controller 
               
               
                   
                 212 
                 SD slave of pouching controller 
               
               
                   
                 213 
                 Management data channel 
               
               
                   
                 214 
                 Data channel bridge 
               
               
                   
                 215 
                 Storage 
               
               
                   
                 215a 
                 Storage for jacket 
               
               
                   
                 215c 
                 Storage for media player 
               
               
                   
                 220c 
                 Modem 
               
               
                   
                 223 
                 Voltage boost 
               
               
                   
                 224 
                 Battery charger 
               
               
                   
                 225 
                 Power manager 
               
               
                   
                 225a 
                 Power manager for jacket 
               
               
                   
                 225b 
                 Power manager for host 
               
               
                   
                 225c 
                 Power manager for media player 
               
               
                   
                 227 
                 On/off button 
               
               
                   
                 228 
                 On/off switch 
               
               
                   
                 230c 
                 Media player 
               
               
                   
                 245 
                 Battery 
               
               
                   
                 245a 
                 Battery for jacket 
               
               
                   
                 255 
                 USB connector 
               
               
                   
                 255c 
                 External connector for media player 
               
               
                   
                 256 
                 USB charger 
               
               
                   
                 257 
                 USB hub 
               
               
                   
                 260 
                 Pouch connector 
               
               
                   
                 260a 
                 Pouch connector of jacket 
               
               
                   
                 260b 
                 Pouch connector of host 
               
               
                   
                 260c 
                 Pouch connector of media player 
               
               
                   
                 261c 
                 Tracks for sliding wireless communicator 
               
               
                   
                 270a 
                 Parent user interface of jacket 
               
               
                   
                 270b 
                 Parent user interface of host 
               
               
                   
                 270c 
                 Parent user interface of media player 
               
               
                   
                 271a 
                 Microphone of jacket 
               
               
                   
                 271b 
                 Microphone of host 
               
               
                   
                 272 
                 Headset audio jack 
               
               
                   
                 273 
                 Earpiece 
               
               
                   
                 273a 
                 Earpiece of jacket 
               
               
                   
                 273b 
                 Earpiece of host 
               
               
                   
                 275 
                 Left speaker 
               
               
                   
                 275a 
                 Speaker(s) of jacket 
               
               
                   
                 275b 
                 Speaker(s) of host 
               
               
                   
                 276 
                 Right speaker 
               
               
                   
                 277a 
                 Vibrator of jacket 
               
               
                   
                 277b 
                 Vibrator of host 
               
               
                   
                 280 
                 Keyboard 
               
               
                   
                 280a 
                 Keyboard of jacket 
               
               
                   
                 280b 
                 Keyboard of host 
               
               
                   
                 281 
                 Soft key 
               
               
                   
                 282 
                 Soft key 
               
               
                   
                 283 
                 Display bar 
               
               
                   
                 285 
                 Peripheral display/camera 
               
               
                   
                 285a 
                 Display of jacket 
               
               
                   
                 285b 
                 Display of host 
               
               
                   
                 285c 
                 Display of media player 
               
               
                   
                 286 
                 Left display panel 
               
               
                   
                 287 
                 Right display panel 
               
               
                   
                 288 
                 Display control element 
               
               
                   
                 289 
                 Strap for USB jacket 
               
               
                   
                 290a 
                 SIM card for jacket 
               
               
                   
                 290b 
                 SIM card for host 
               
               
                   
                 292 
                 SPDT switch of USB jacket 
               
               
                   
                 293 
                 USB2SD bridge of USB jacket 
               
               
                   
                 295 
                 Web browser 
               
               
                   
                 296 
                 Micro-SD card of USB jacket 
               
               
                   
                 297 
                 Controller of micro-SD card 
               
               
                   
                 298 
                 Storage of micro-SD card 
               
             
          
           
               
                 Elements generally related to the pouching connection/ 
               
               
                 Network elements 
               
             
          
           
               
                   
                 300 
                 Manufacturer/seller/service provider 
               
               
                   
                 310 
                 Appliance registration report 
               
               
                   
                 320 
                 Appliance diagnostic report 
               
               
                   
                 395 
                 Web server 
               
               
                   
                 400 
                 Bi-directional power control circuit 
               
               
                   
                 500 
                 Audio and USB multiplexing circuit 
               
               
                   
                 505 
                 D+ signal line 
               
               
                   
                 510 
                 D− signal line 
               
               
                   
                 515 
                 Analog/digital switch 
               
               
                   
                 520 
                 Analog/digital switch 
               
               
                   
                 525 
                 Control signal line 
               
               
                   
                 530 
                 Headset left signal line 
               
               
                   
                 535 
                 Headset right signal line 
               
               
                   
                 540 
                 USB signal line 
               
               
                   
                 545 
                 USB signal line 
               
               
                   
                 550 
                 Headset microphone signal line 
               
               
                   
                 555 
                 USB signal line 
               
               
                   
                 560 
                 Headset detection line 
               
               
                   
                 565 
                 USB detection line 
               
               
                   
                 600 
                 SD/MMC bi-directional bridge 
               
               
                   
                 610 
                 Level shifter buffer 
               
               
                   
                 610b 
                 Level shifter buffer 
               
               
                   
                 610c 
                 Level shifter buffer 
               
               
                   
                 615 
                 Level shifter buffer 
               
               
                   
                 615b 
                 Level shifter buffer 
               
               
                   
                 615c 
                 Level shifter buffer 
               
               
                   
                 620 
                 Data flip-flop module 
               
               
                   
                 620b 
                 Data flip-flop module 
               
               
                   
                 620c 
                 Data flip-flop module 
               
               
                   
                 625 
                 Data flip-flop module 
               
               
                   
                 625b 
                 Data flip-flop module 
               
               
                   
                 625c 
                 Data flip-flop module 
               
               
                   
                 630 
                 Data flip-flop module 
               
               
                   
                 630b 
                 Data flip-flop module 
               
               
                   
                 630c 
                 Data flip-flop module 
               
               
                   
                 635 
                 Data flip-flop module 
               
               
                   
                 635b 
                 Data flip-flop module 
               
               
                   
                 635c 
                 Data flip-flop module 
               
               
                   
                 640 
                 Data by-pass line 
               
               
                   
                 640b 
                 Data by-pass line 
               
               
                   
                 640c 
                 Data by-pass line 
               
               
                   
                 645 
                 Data by-pass line 
               
               
                   
                 645b 
                 Data by-pass line 
               
               
                   
                 645c 
                 Data by-pass line 
               
               
                   
                 650 
                 Logical processing unit 
               
               
                   
                 650b 
                 Logical processing unit 
               
               
                   
                 650c 
                 Logical processing unit 
               
               
                   
                 655 
                 Logical processing unit 
               
               
                   
                 655b 
                 Logical processing unit 
               
               
                   
                 655c 
                 Logical processing unit 
               
               
                   
                 660 
                 Logical processing unit 
               
               
                   
                 660b 
                 Logical processing unit 
               
               
                   
                 660c 
                 Logical processing unit 
               
               
                   
                 665 
                 Logical processing unit 
               
               
                   
                 665b 
                 Logical processing unit 
               
               
                   
                 665c 
                 Logical processing unit 
               
               
                   
                 670 
                 Pull-up resistor 
               
               
                   
                 670c 
                 Pull-up resistor 
               
               
                   
                 675 
                 Pull-up resistor 
               
               
                   
                 675b 
                 Pull-up resistor 
               
               
                   
                 675c 
                 Pull-up resistor 
               
               
                   
                 680 
                 Control signal line 
               
               
                   
                 690 
                 SD/MMC bi-directional bridge 
               
               
                   
                 700 
                 GSM communication network 
               
               
                   
                 715 
                 Base transceiver station 
               
               
                   
                 720 
                 Base station controller 
               
               
                   
                 725 
                 Mobile switching center 
               
               
                   
                 730 
                 Serving GPRS support node 
               
               
                   
                 735 
                 GPRS HLR/AUC/EIR 
               
               
                   
                 740 
                 GPRS visitor location registry 
               
               
                   
                 745 
                 Gateway mobile switching center 
               
               
                   
                 750 
                 Public-switched telephone network 
               
               
                   
                 755 
                 Gateway GPRS support node 
               
               
                   
                 760 
                 Internet 
               
               
                   
                 765 
                 Remote server 
               
               
                   
                 800 
                 CDMA communication network 
               
               
                   
                 805 
                 Packet control function 
               
               
                   
                 810 
                 Packet data serving node 
               
               
                   
                 815 
                 Packet core network 
               
               
                   
                 820 
                 CDMA home agent 
               
               
                   
                 825 
                 CDMA AAA server 
               
               
                   
                 830 
                 CDMA interworking function 
               
               
                   
                 900 
                 WiFi communication network 
               
               
                   
                 905 
                 Wireless router 
               
               
                   
                 910 
                 Modem 
               
               
                   
                   
               
             
          
         
       
     
     DETAILED DESCRIPTION 
     Aspects of the present invention relate to a wireless communicator that attaches to an enhanced function device in a manner referred to herein as pouching. Pouching is defined herein to mean inserting the wireless communicator device inside of the enhanced function device so that the wireless communicator is at least partially obscured by the enhanced function device, and such that the enhanced function device mechanically supports the wireless communicator. 
     There are two general types of enhanced function devices into which the wireless communicator may be pouched; namely, jackets and hosts. A jacket is a device that provides a user interface for the wireless communicator, enriches, the capabilities of the wireless communicator, and is not able to operate independently when the wireless communicator is not pouched therewith. Conversely, a host is a device that is able to operate independently when the wireless communicator is not pouched therewith, and whose capabilities are enriched by the wireless communicator when the wireless communicator is pouched therewith. Generally a host does not have communication functionality independent of the wireless communicator. 
     Reference is now made to  FIG. 1 , which is a simplified illustration of a multifunctional multi-parent, pouchable communication system constructed and operative in accordance with an embodiment of the present invention. Shown in  FIG. 1  are a variety of wireless communicators, including 2.5 G communicators for a GSM network, 3 G communicators for GSM network, and CDMA communicators for a CDMA network. Such wireless communicators are described hereinbelow with reference to  FIGS. 38 and 39 . It will be appreciated by those skilled in the art that the networks illustrated in  FIG. 1  are exemplary of a wide variety of networks and communication protocols that are supported by the wireless communicators of the present invention, such networks and communication protocols including inter alia WiFi, Bluetooth and WiMax. 
     Also shown in  FIG. 1  are a variety of enhanced function devices. In accordance with an embodiment of the present invention, each wireless communicator may be pouched with each enhanced function device, and is compatible therewith. The wireless communicators are substantially of the same form factor and, as such, are able to be pouched with the various enhanced function devices. 
     Reference is now made to  FIG. 2A , which is a simplified illustration of various stages of pouching of a wireless communicator  100  with a first enhanced function device  200   a  in accordance with an embodiment of the present invention. First enhanced device  200   a  is a jacket for wireless communicator  100 . The housing of wireless communicator  100  has an at least partially transparent portion  101  for a light source, such as an LED display, to show through. When wireless communicator  100  is fully inserted into jacket  200   a  so that electrical connection is made via a pouch connector, the light source is lit underneath portion  101 , indicating that the connection has been made. 
     It will be appreciated by those skilled in the art that the light source may be used to indicate a status of wireless communicator  100 . Thus the light source may indicate inter alia a battery status of wireless communicator, or a reception strength thereof. The light source may indicate an operational mode of wireless communicator  100 . Thus the light source may indicate inter alia an audio conversation mode or a video conversation mode. The light source may indicate when a new message has been received by wireless communicator  100 , or when a new message has been sent by wireless communicator  100 . The light source may indicate that wireless communicator  100  has an incoming call. Similarly, the light source may indicate a status or operational mode of enhanced function device  200  when wireless communicator  100  is pouched therewith. 
     Reference is now made to  FIG. 2B , which is a simplified illustration of various stages of pouching of wireless communicator  100  with a second enhanced function device  200   b  in accordance with an embodiment of the present invention. Second enhanced function device  200   b  is a host for wireless communicator  100 . When wireless communicator  100  is fully inserted into jacket  200   b  so that electrical connection is made via a pouch connector, a light source is lit underneath portion  101 , confirming that the connection has been made. 
     Reference is now made to  FIGS. 3A and 3B , which are pictorial illustrations of an embodiment of wireless communicator  100  in accordance with an embodiment of the present invention. Wireless communicator  100  is small; in one embodiment, its dimensions are approximately 72.09 mm×37.59 mm×7.80 mm. Those skilled in the art will appreciate that the present invention is applicable when wireless communicator  100  is manufactured with other dimensions, as well. As shown in  FIGS. 3A and 3B , the housing for wireless communicator  100  includes an at least partially transparent portion  101  for a light source to show through. 
     Reference is now made to  FIGS. 4A and 4B , which are pictorial illustrations of an embodiment of enhanced function device  200  in accordance with an embodiment of the present invention. 
     Reference is now made to  FIG. 5 , which is a pictorial illustration of an embodiment of an internal antenna  140  of wireless communicator  100  in accordance with an embodiment of the present invention. As shown in  FIG. 5 , antenna  140  includes an opening  141  for a light, such as an LED light, to show through. Antenna  140  is positioned so that opening  141  is aligned underneath at least partially transparent portion  101  of  FIGS. 3A and 3B . The light for indicating a pouching connection between wireless communicator  100  and enhanced function device  200  thus shows through opening  141  and is visible through portion  101 . 
     Reference is now made to  FIG. 6 , which is a simplified block diagram illustration of wireless communicator  100  in accordance with an embodiment of the present invention. Wireless communicator  100  includes six primary components, as follows: a pouching controller  110 , a memory storage  115 , a modem  120  for sending and receiving voice communications, a power management subsystem  125 , a power amplifier  135  and a native user interface  170 . 
     Pouching controller  110  executes programmed instructions that control the data flow between wireless communicator  100  and enhanced function device  200 . Modem  120  controls the wireless communication functionality of wireless communicator  100 . Power management subsystem  125  includes charging circuitry for charging a battery  145 . Power amplifier  135  includes a radio frequency (RF) interface  136 , and is connected to an antenna  140 . Native user interface  170  includes a microphone  171  and an earpiece  173 . Native user interface  170  also includes an optional speaker  175 , vibrator  177 , keyboard  180  and display  185 . It will be appreciated by those skilled in the art that native user interface  170  may included additional components, such as a headset audio jack. 
     Wireless communicator includes an optional audio/video subsystem  130 , which includes inter alia a voice, audio and video interface. 
     Wireless communicator  100  includes a connector  150 , which includes a pouch connector  160  and an optional USB connector  155 . Wireless communicator  100  optionally includes a SIM  190 . 
     Generally, each subscriber of a wireless communication network is uniquely identified. Various methods are known in the art for identifying subscribers, including inter an IP address and a subscriber identification module (SIM). Although the description herein refers to SIM cards, those skilled in the art will appreciate that other forms of subscriber identification may be used instead. 
     Wireless communicator  100  operates in standalone mode or in conjunction with enhanced function devices, such as enhanced function device  200  shown in  FIGS. 2A and 2B , when it is pouched therein via pouch connector  160 . 
     Preferably the interface between pouching controller  110  and storage  115 , and the interface between pouching controller  110  and modem  120  are SD interfaces. The interface between pouching controller  110  and pouch connector  160  is a customized pouching interface. 
     Reference is now made to  FIG. 7A , which is a simplified block diagram illustration of first enhanced function device  200   a  in accordance with an embodiment of the present invention. Enhanced function device  200   a  is a jacket for wireless communicator  100 . Enhanced function device  200   a  includes a pouching controller  210   a  and a pouch connector  260   a , for use when wireless communicator  100  is pouched with enhanced function device  200   a  via the wireless communicator&#39;s pouch connector  160 . Enhanced function device  200   a  includes an optional auxiliary processor  205   a , an optional storage  215   a , an optional power management subsystem  225   a , and an optional battery  245   a , and an optional SIM  290   a.    
     Enhanced function device  200   a  includes a parent user interface  270   a  including an optional microphone  271   a , an optional earpiece  273   a , an optional mono speaker or optional stereo speakers  275   a , an optional vibrator  277   a , an optional keyboard  280   a  and an optional display  285   a . It will be appreciated by those skilled in the art that native user interface  270   a  may included additional components, such as a headset audio jack. 
     Preferably the interface between pouching controller  210   a  and storage  215   a , is an SD interface. The interface between pouching controller  210   a  and pouch connector  260   a  is a customized pouching interface. 
     Reference is now made to  FIG. 7B , which is a simplified block diagram illustration of second enhanced function device  200   b  in accordance with an embodiment of the present invention. Enhanced function device  200   b  is a host for wireless communicator  100 . Enhanced function device  200   b  includes a pouching controller  210   b , a power management subsystem  225   b  and a pouch connector  260   b . Enhanced function device  200   b  includes an optional host controller  205   b , an optional battery  245   b  and an optional SIM  290   b.    
     Enhanced function device  200   b  includes a parent user interface  270   b  including an optional microphone  271   b , an optional earpiece  273   b , an optional mono speaker or optional stereo speakers  275   b , an optional keyboard  280   b , and an optional display  285   b . It will be appreciated by those skilled in the art that native user interface  270   b  may included additional components, such as a headset audio jack. 
     The interface between pouching controller  210   b  and pouch connector  260   b  is a customized pouching interface. 
     In accordance with an embodiment of the present invention, enhanced function device  200   a / 200   b  includes SIM  290   a / 290   b , and when wireless communicator  100  is pouched with enhanced function device  200   a / 200   b , wireless communicator  100  can access SIM  290   a / 290   b  via pouch connectors  160  and  260   a / 260   b . As such, wireless communicator  100  is able to identify itself to a wireless network using either SIM  190  or SIM  290   a / 290   b.    
     Having access to more than one SIM when pouched with enhanced function device  200   a / 200   b , provides many diverse advantages to wireless communicator  100 . Wireless communicator  100  is then able inter alia (i) to receive incoming communications for multiple subscribers, (ii) to select a desired subscriber identity for sending outgoing communications, and (iii) to change the identity of wireless communicator  100  in a wireless network from the identity corresponding to SIM  190  to an alternate identity corresponding to SIM  290   a / 290   b.    
     In an embodiment of the present invention, SIM  290   a / 290   b  is a prepaid SIM, which allows a limited amount of communication. 
     In another embodiment of the present invention SIM  190  and SIM  290   a / 290   b  are associated with different billing programs of a wireless operator. 
     In another embodiment of the present invention, SIM  190  and SIM  290   a / 290   b  may have different access rights to resources in a wireless network. 
     In another embodiment of the present invention, wireless communicator  100  uses SIM  290   a / 290   b  in conjunction with SIM  190 , when wireless communicator  100  is pouched with enhanced function device  200   a / 200   b.    
     In another embodiment of the present invention, when wireless communicator  100  is pouched with enhanced function device  200   a / 200   b , enhanced function device  200   a / 200   b  stores instructions on when to use SIM  290   a / 290   b  for subscriber identification. For example, enhanced function device  200   a / 200   b  may instruct wireless communicator  100  to use SIM  290   a / 290   b  for international calls, for SMS messaging and for data services. For other communications, wireless communicator uses SIM  190 . 
     In another embodiment of the present invention, when wireless communicator  100  is pouched with enhanced function device  200   a / 200   b , wireless communicator  100  prompts a user to select between possible subscriber identifiers. Further, if wireless communicator  100  is connected to a network prior to being pouched with enhanced function device  200   a / 200   b , and if the user selects to change subscriber identity when wireless communicator is subsequently pouched with enhanced function device, then wireless communicator  100  disconnects from the network and reconnects to the network using the changed subscribed identify. 
     It will be appreciated by those skilled in the art that use of more than one SIM may enables wireless communicator  100 , when pouched with enhanced function device  200   a / 200   b , to access wireless networks for which wireless communicator alone does not have access thereto. 
     It will further be appreciated by those skilled in the art that enhanced function device  200   a / 200   b  may include more than one SIM  290   a / 290   b.    
     Reference is now made to  FIG. 8A , which is a simplified flow chart illustration of operation of wireless communicator  100  when pouched within enhanced function device  200 , in accordance with an embodiment of the present invention. At step  1005  wireless communicator  100  is pouched with enhanced function device  200 . At step  1010  wireless communicator  100  and enhanced function device  200  authenticate each other. 
     In this regard, reference is now made to  FIG. 8B  which is a simplified diagram of logic for alien rejection for wireless communicator  100  and enhanced function device  200  in accordance with an embodiment of the present invention. Wireless communicator  100  and enhanced function device  200  each have a private key and a certificate signed by a trusted third party private key. As shown in  FIG. 8B , the following sequence of events occurs at step  1010  of  FIG. 8A .
         Wireless communicator  100  sends its signed certificate to enhanced function device  200  for validation.   Enhanced function device  200  validates the certificate using the third party public key.   After validation, enhanced function device  200  sends its certificate to wireless communicator  100  for validation.   Wireless communicator  100  validates the certificate using the third party public key.   After validation, wireless communicator  100  generates a pseudo random number, a, encrypts it using the enhanced function device public key, and sends the encrypted value to enhanced function device  200 .   Enhanced function device  200  generates a pseudo random number, b, encrypts it using the wireless communicator public key, and sends the encrypted value to wireless communicator  100 .   Wireless communicator  100  decrypts b using its private key.   Wireless communicator encrypts a*b using the enhanced function device public key, and sends the encrypted value to enhanced function device  200 .   Enhanced function device  200  decrypts a*b using its private key, and validates a*b.   Enhanced function device  200  decrypts a using its private key.   Enhanced function device  200  encrypts a*b using the wireless communicator public key, and sends the encrypted value to wireless communicator  100 .   Wireless communicator  100  decrypts a*b using its private key and validates a*b.       

     The logic shown in  FIG. 8B  thus establishes a common key between wireless communicator  100  and enhanced function device  200 , and enables validation of each certificate to facilitate alien rejection at step  1010 . 
     Referring back to  FIG. 8A , at step  1015  a determination is made whether or not wireless communicator  100  and enhanced function device  200  are mutually alien, based on the outcome of the logic shown in  FIG. 8B . If so, then processing aborts at step  1020 . Otherwise, at step  1025  wireless communicator  100  reads information about enhanced device, the information including inter alia subscriber network identification information. At step  1028  wireless communicator  100  discovers the characteristics of the enhanced function device that it is pouched with. At step  1029  wireless communicator  100  auto-adapts itself to enhanced function device  200 . 
     At step  1030  wireless communicator  100  determines whether or not enhanced function device  200  has a subscriber network identifier suitable for wireless communicator  100 . If so, then at step  1035  pouching controller  110  determines the subscriber network identifier from enhanced function device  1035 . If not, then at step  1040  pouching controller  110  determines a subscriber network identifier from an embedded identifier. At step  1045  wireless communicator uses the determined identifier to connect to a wireless network. 
     In accordance with an embodiment of the present invention, enhanced function device  200  operates with a plurality of wireless communicators  100  simultaneously. Simultaneous pouching of the plurality of wireless communicators  100  with the same enhanced function device  200  has many advantages, including inter alia (i) battery charging, (ii) combining multiple wireless communication channels to expand bandwidth, (iii) enabling enhanced function device  200  to accept communication transmitted to any of the plurality of wireless communicators, (iv) usage of data storage in more than one wireless communicator, and (v) transfer of data from one wireless communicator to another wireless communicator. 
     According to an embodiment of the present invention, the pouching location of the plurality of wireless communicators within enhanced function device  200  dictates an order of priority for the plurality of wireless communicators. 
     According to an embodiment of the present invention, each of plurality of wireless communicators  100  has an identifier that is displayed by parenting user interface  270  of enhanced function device  200 . 
     According to an embodiment of the present invention, parenting user interface  270  enables modification of the wireless communicator identifiers. 
     Reference is now made to  FIG. 9 , which is a simplified block diagram of a pouching interface between wireless communicator  100  and enhanced function device  200  in accordance with an embodiment of the present invention. As shown in  FIG. 9 , the pouching interface includes two data channels; namely, a first data channel for use by a wireless communicator manager  113  and an enhanced function device manager  213 , and a second data channel for use by a wireless communicator bridge  114  and an enhanced function device bridge  214 . Said managers  113  and  213  and bridge  114  and  214  may be embodied in pouching controller. 
     The first data channel is used for exchanging mailbox messages between pouching controller  110  and pouching controller  210 . The second data channel is used to place peripherals such as camera/display  285 , in direct connection with modem  120 . 
     In accordance with an embodiment of the present invention, the interface for the peripherals is translated into a proprietary protocol in wireless communicator  100 , and is translated back to the original peripheral interface in enhanced function device  200 . 
     The pouching interface may include third data channel, for use in transferring large amounts of data between pouching controller  110  and pouching controller  210 . 
     The pouching interface includes inter alia audio channels and power supply lines. 
     In accordance with an embodiment of the present invention, pouching of wireless communicator  100  with enhanced function device  200  may reduce the functionality of wireless communicator  100 . Specifically, functions accessible to wireless communicator  100  may be limited when wireless communicator is pouched with enhanced function device  200 . For example, when pouched with enhanced function device  200 , wireless communicator  100  may be limited to only dialing designated phone numbers, or to only connecting to designated web sites, or to only using a text editor to send SMS messages. Similarly, wireless communicator  100  may be limited to air-time, and restricted to accessing configuration settings for wireless communicator  100 . 
     According to an embodiment of the present invention, the limiting of wireless communicator functionality is initiated automatically when wireless communicator  100  is pouched with enhanced function device  200 . According to another embodiment of the present invention, the limiting of wireless communicator functionality is initiated manually; e.g., by entering a password. 
     In an embodiment of the present invention, the user can manually remove the reduction of functionality whilst the wireless communicator is pouched within enhanced function device; e.g. by entering a password. 
     According to an embodiment of the present invention, the limiting of wireless communicator functionality is a parental control mechanism. According to an embodiment of the present invention, jacket  200  is used to authenticate wireless communicator  100 . E.g., a children&#39;s wireless communicator  100  is only configurable when pouched within a parental jacket  200 ; or vice versa a children&#39;s jacket  200  is only configurable when a parental wireless communicator  100  is pouched therewith. Moreover, according to an embodiment of the present invention when a parental wireless communicator  100  is pouched with a children&#39;s jacket  200 , the parental wireless communicator  100  assigns a parent&#39;s phone number to a designated programmable key in children&#39;s jacket  200 . 
     1. Three Operation States of Wireless Communicator 
     Embodiments of the present invention relate to the capability of wireless communicator  100  (i) to operate in a standalone mode, (ii) to be pouched with a jacket shell that is not an independent device and that cannot operate without the wireless communicator  100  being pouched thereto, and (iii) to be pouched with an enhanced function device that serves as the wireless communicator&#39;s host. In state (ii) wireless communicator  100  functions as a master, and in state (iii) the wireless communicator  100  functions as a slave. 
     It will thus be appreciated by those skilled in the art that wireless communicator  100  is operable in three states; namely, (I) a standalone state, (II) a state connected to a simple host, and (III) a state connected to a complex host. In State II the simple host is a jacket shell. Wireless communicator  100  operates as a master and the jacket operates as a slave. Conversely, in State III the complex host is an enhanced function host device. Wireless communicator  100  operates as a slave and the enhanced function host device operates as a master. 
     In State I as a standalone, wireless communicator  100  has its own user interface and provides communication data and voice over radio technology, in addition to other services including inter alia MP3 playing. 
     In State II connected to a simple host, the jacket is not an independent device and cannot operate without wireless communicator  100  being pouched therewith. The jacket may include only a display, a keyboard and a simple non-volatile storage chip. Optionally, the jacket may further include speakers, a microphone and a secondary power source. Wireless communicator  100  supplies power to jacket&#39;s keyboard, display speakers and microphone, and to the wireless communicator&#39;s own internal circuitry. Wireless communicator  100  uses the jacket&#39;s secondary power source to charge the wireless communicator&#39;s internal power source. 
     During initialization, after wireless communicator  100  is pouched with the jacket, or at boot time, static configuration parameters are read from the storage of the jacket to wireless communicator  100 . Thereafter, wireless communicator  100  provides the jacket with display information, in the form of screen shots such as bitmap images. 
     In State III connected to a complex host, the enhanced function host device is an independent device that operates independently of wireless communicator  100 , such as an MP3/MPP player or a digital camera. Commands and information are shared, and sent over an SD control bus during operation. The enhanced function host device includes its own host controller, user interface and power source. The user interface for both the device functionality and the wireless communicator functionality operates through the enhanced function host device. The interface to the enhanced function host device is via pouch connector  160 , where pins on the connector  160  have specifically assigned functionalities and use specific protocols. 
     It will thus be appreciated by those skilled in the art that the pouch connector to the jacket is via the same pouch connector as is the connector to the enhanced function host device, but the pins on pouch connector generally have different functionalities and use different protocols with the jacket than those used with the enhanced function host device. 
     The three operational states of wireless communicator  100  are summarized in TABLE I hereinbelow. 
     
       
         
               
             
               
               
               
             
           
               
                 TABLE I 
               
               
                   
               
               
                 Three Operation States of Wireless Communicator 100 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 State I 
                 Standalone 
                 Wireless communicator uses its own interface 
               
               
                 State II 
                 Connected to a 
                 Wireless communicator is master; jacket is 
               
               
                   
                 simple host 
                 slave 
               
               
                   
                   
                 Jacket cannot operate without wireless 
               
               
                   
                   
                 communicator 
               
               
                   
                   
                 Wireless communicator provides jacket with 
               
               
                   
                   
                 screen shots, in the form of bitmap images, 
               
               
                   
                   
                 for display information 
               
               
                   
                   
                 Communication is through SD bus 
               
               
                 State III 
                 Connected to a 
                 Wireless communicator is slave; Enhanced 
               
               
                   
                 complex host 
                 function device is master 
               
               
                   
                   
                 Enhanced function device operates 
               
               
                   
                   
                 independently of wireless communicator 
               
               
                   
                   
                 Wireless communicator provides enhanced 
               
               
                   
                   
                 function device with screen shots, in the 
               
               
                   
                   
                 form of bitmap images, for display information 
               
               
                   
                   
                 Communication is through SD bus 
               
               
                   
               
             
          
         
       
     
     Reference is now made to  FIG. 10 , which is a simplified block diagram of wireless communicator  100  with three operational states in accordance with an embodiment of the present invention. Wireless communicator  100  as shown in  FIG. 10  supports the three operational states in TABLE I. The components of wireless communicator  100  shown in  FIG. 10  enable it to function as a standalone device. When enhanced function device  200  is connected to wireless communicator  100 , wireless communicator  100  may operate as a master or as a slave, and the SD communication between pouch connectors  160  and  260  flows accordingly. Specifically, in State II wireless communicator  100  is the master and enhanced function device  200  is the slave, and in State III wireless communicator  100  is the slave and enhanced function device  200  is the master. 
     In accordance with an embodiment of the present invention wireless communicator  100  automatically detects its operational environment by monitoring the voltage on designated pins of pouch connector  160 . I.e., communication card  100  distinguishes between States I-III based on voltage. Enhanced function host devices and jacket shells generally drive the voltage on these pins differently, which enables wireless communicator  100  to discriminate whether or not it is pouched with an enhanced function device, and to detect the type of enhanced function device it is connected to. 
     In this regard, reference is made to  FIG. 11 , which is a simplified flowchart of a method for wireless communicator  100  to detect the type of enhanced function device  200  it is pouched with in accordance with an embodiment of the present invention. At step  1110  battery subsystem  125  or optionally pouching controller  110  monitors the connector signal VBat_host, shown in  FIG. 10 . If the VBat_host signal has a voltage level higher than logical zero (i.e., 0.5V or higher), as determined at step  1120 , then pouching controller  110  concludes that wireless communicator  100  is pouched with an enhanced function device. Otherwise, if VBat_host is logical zero (i.e., below 0.5V), then at step  1130  pouching controller  110  concludes that wireless communicator  100  is not pouched with an enhanced function device. 
     In order to detect which type of enhanced function device wireless communicator  100  is pouched with, pouching controller  110  monitors the HOST_INT/TYPE signal, shown in  FIG. 10 . When pouching is detected, the HOST_INT/TYPE signal is sampled at step  1140 . If HOST_INT/TYPE is a logical zero (i.e., below 0.5V), as determined at step  1150 , then at step  1160  the pouching controller  110  concludes that enhanced function device  200  is a jacket shell. Otherwise, if HOST_INT/TYPE is higher than logical zero (i.e., 0.5V or higher), then at step  1170  the pouching controller  110  concludes that enhanced function device  200  is a host device. 
     The use of HOST_INT/TYPE for detecting the type of enhanced function device  200 , is made at the time of pouching wireless communicator  100  with enhanced function device  200 . Afterwards, the signal HOST_INT/TYPE is used as an interrupt signal. 
     In an alternative embodiment of the present invention, the SD_Vdd signal, shown in  FIG. 10 , may be monitored at step  1110  instead of or in addition to the VBat_host signal. Whereas the VBat_host signal generally indicates whether or not communication card  100  is pouched with an enhanced function device, the SD_Vdd signal generally indicates whether or not the enhanced function device is turned on. 
     It will be appreciated by those skilled in the art that the threshold of 0.5V used in the above discussion is merely indicative of a general pre-designated threshold that is used to detect attachment of the host to the communication card, and to detect the type of the host. 
     In an embodiment of the present invention, pouching controller pouching controller  110  notifies modem  120  of pouching and the type of enhanced function device. 
     When wireless communicator modem  120  detects that wireless communicator is pouched with an enhanced function device, native user interface  170  of wireless communicator  100  is at least partially disabled at step  1180 . For enhanced function devices, wireless communicator modem  120  receives user interface inputs, and provides feedback as bitmap graphics BMP screen shots, or as single messages, via the pouching interface. The enhanced function device controls the device&#39;s display and keyboard. For enhanced function jackets, the wireless communicator modem  120  receives direct keyboard strokes from the jacket keyboard, and provides the displayed image pixels/characters directly to the jacket display, using the enhanced function device pouching controller  210   a.    
     In an embodiment of the present invention, in order to be powered, jackets connect their internal circuitry to the Vbat_Comm signal that connects to connector  105 . If a jacket  200  has a secondary battery, then the secondary battery is connected to Vbat_Host, which connects to the wireless communicator&#39;s  100  power management subsystem  125  and is used to charge the wireless communicator&#39;s internal battery  145 . 
     Similarly, the internal circuitry of an enhanced function device  200  is powered by connecting its internal power source to Vbat_Host. Enhanced function device  200  does not use the Vbat_Comm signal as a power source, but may monitor it to detect when wireless communicator  100  is pouched therewith, or to monitor the wireless communicator&#39;s battery level. 
     2. Extending Functionality of Memory Cards 
     Embodiments of the present invention concern extending the functionality of SD cards, beyond the local storage functionality that is conventionally provided. Using the present invention, SD cards can provide wired or wireless communication channels to access remote content servers, and can stream content from, upload content to and download content from these servers. 
     Using the present invention, SD cards can also include applications that are controlled and displayed by enhanced function device  200 , and implemented on wireless communicator  100 . 
     Wireless communicator  100  is compatible with existing SD physical and logical interfaces, and operates transparently with enhanced function devices  200  that include SD slots. 
     Aspects of the present invention further provide an improved SD memory card that provides extended functionality, including (i) wired or wireless communication channels for accessing remote content servers, and (ii) applications that are controlled and displayed by an SD host device, but are implemented on the SD card. Using the improved SD memory card of the present invention, wireless communicator  100  can stream music or video from remote content servers, download files from these servers, and upload files to these servers. 
     Reference is now made to  FIG. 12 , which is a simplified diagram of an SD card interface that provides extended functionality in accordance with the present invention. 
     In accordance with a embodiment of the present invention shown in  FIG. 12 . Wireless communicator  100  uses the same interface as a standard SD card, and thus operates seamlessly with enhanced function device  200 . Pouching controller  110  is controlled by embedded software. Wireless communicator storage  115  is embodied as flash memory storage. Wireless communicator  100  includes an SD slave controller  112 , for accessing a file system that is stored on flash memory  115 . Baseband modem  120  is embodied inter alia as a cellular modem, as a WLAN modem, as a WPAN modem, or as a wireless modem. 
     Further in accordance with an embodiment of the present invention shown in  FIG. 12 , enhanced function device  200  as embodied in  FIG. 12  includes a pouch. Pouching controller  210  is software controlled to process an SD instruction stack. Enhanced function device  200  also includes an SD driver  207 . Enhanced function device  200  also includes an SD application  208  that performs extended functionality enabled by wireless communicator  100 . Details of operation of SD application  208  are described hereinbelow with reference to  FIG. 14 . 
     Pouch connectors  160  and  260  enable dab communication between enhanced function device  200  and wireless communicator  100 . Pouch connectors  160  and  260  also enable wireless communicator  100  to receive electrical power from enhanced function device  200 . 
     In accordance with an embodiment of the present invention, wireless communicator  100  interfaces with enhanced function device  200  as a standard SD card, and provides information for a virtual file system. The file and directory structure reported by slave controller  112  to enhanced function device  200  does not necessarily reflect files and directories that are stored on wireless communicator  100 . Directory names may represent names of remote servers accessible via baseband modem  120 , and they may represent names of services that wireless communicator  100  provides. The operation of opening a directory by the host, signals pouching controller  210  to access a specific server or activate a specific service. 
     In accordance with the present invention, file names may represent names of files or streams that are stored remotely on a selected server. Opening a specific files triggers wireless communicator  100  to access the remote file or stream and download it to the card. Immediate access to the file by the host is provided via a dummy copy of the file that may include a place holder message such as “file is currently being downloaded, download will be complete within xx seconds”. The place holder message may be provided in the form of an audio file, such as an MP3 or WMA file, or an image file, such as a JPEG of GIF file, depending on the type of file that was requested. 
     Writing a file to a designated location on wireless communicator  100  operates to upload the file to the selected remote server. 
     In accordance with the present invention, file names may also be used to designate controls for applications that are executed on wireless communicator  100 . Opening of a file designates activation of a corresponding control. 
     For one usage scenario, wireless communicator  100  may have a directory named “Radio”. Selection of this directory activates a radio on the card. In turn, the Radio directory includes a list of files with names “Search Forward”, “Search Backward”, “Volume Up” and “Volume Down”. Opening the “Search Forward” file, for example, activates an instruction to the radio to skip to the next channel. 
     For another usage scenario, enhanced function device  200  writes to a file in a directory named “ATComm”. In response, an AT command, which includes content written to the file, is issued to baseband modem  120 . Thus, if the host writes “ATZ” to the file, which is a reset command, the command is transmitted to baseband modem  120 . The modem reply, which is typically “OK”, is written to a second file in the ATComm directory, available for enhanced function device  200  to read. 
     For devices that support more advanced data formats such as HTML pages or Java applications, wireless communicator  100  provides a graphical user interface via an HTML file or Java application file that is stored on the card. The host device opens and executes such file, e.g., main.html, which in turn provides a graphical representation for accessing remote files or for controlling an application on wireless communicator  100 . File content and HTML links are changed dynamically corresponding to changes in information or changes in status. 
     With the graphical user interface, control wireless communicator  100  is still performed by selecting, opening and writing to files, but the interface is graphical, as coded in the HTML file or Java application. 
     As described hereinabove, directory names on wireless communicator  100  may represent names of remote servers, and file names on wireless communicator  100  may correspond to names of remote files and streams. Reference is now made to  FIG. 13 , which is a simplified illustration of an arrangement of clusters in an SD card file system in accordance with an embodiment of the present invention. Shown in  FIG. 13  is a flash memory in SSD card is represented as including 60 clusters, numbered consecutively from 1 to 60, although clusters 31-60 are virtual, non-physical clusters, as described in detail in what follows. 
     The physical memory on wireless communicator  100  is generally partitioned into 512 byte sectors, and four sectors are combined to form a 2 KB cluster, although it will be appreciated by those skilled in the art that other partitions are within the scope of the present invention. In  FIG. 11  the physical memory includes clusters 1-30. Information regarding available clusters on wireless communicator  100  is maintained in a file allocation table (FAT). For each cluster, two bytes are stored in the FAT, as follows. 
     
       
         
               
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 0, 
                 if cluster is empty 
               
               
                   
                 Next cluster in file, 
                 if cluster is not the last cluster in a 
               
               
                   
                   
                 file 
               
               
                   
                 0xFFF8, 
                 if cluster is the last cluster in a file 
               
               
                   
                 0xFFF7, 
                 if cluster is a bad cluster 
               
               
                   
                   
               
             
          
         
       
     
     Clusters 1-6 of  FIG. 13  correspond to an MP3 file that is stored as a cluster chain. The first cluster in the chain is cluster 1, and the chain continues through clusters 2, 3, 4, 5 and 6, with cluster 6 being the last cluster in the file, designated as an EOF (end-of-file) cluster. The arrows drawn in these clusters represent pointers that advance through the chain of clusters. Clusters 7-9 of  FIG. 13  correspond to an MP3 file that is currently being downloaded. As such, cluster 9 is not necessarily an EOF cluster since additional downloaded data may require additional clusters for storage. Similarly, clusters 26-28 correspond to a second MP3 file that is currently being downloaded. Clusters 23 and 24 correspond to an MP4 file that is currently being downloaded. Clusters 10-22 and 25, 29 and 30 are free clusters. The cross-hatching in the clusters of  FIG. 13  corresponds to the type of cluster, as indicated in the FAT legend. 
     Information about files is stored in a directory, designated “ROOT DIRECTORY” in  FIG. 13 , having 32 byte directory entries generally including the following information. 
                                             File name with 8+3 characters           Type - regular file, directory           File size           Date &amp; time           First cluster of file                        
File names longer than 8+3 characters are obtained by including additional entries for the same file with special attributes. The directory itself is stored in the file system as a regular file.
 
     In an embodiment of the present invention illustrated in  FIG. 13 , the SD file system is extended by declaring the volume to be of a size larger than the amount of available physical flash memory. Enhanced function device  300  is not aware of the discrepancy since it never needs to write to the excess volume. 
     The extended volume includes physical clusters, which are mapped to real flash memory locations, and virtual clusters, which have addresses beyond the available flash memory. Cluster 1-30 in  FIG. 13  are physical clusters, and clusters 31-60 are virtual clusters. Upon initialization, the virtual clusters may be marked as bad clusters in the FAT, thereby ensuring that enhanced function device  100  does not try to write to these clusters. More generally, when host device is powered up, the flash memory is reset by erasing all file entries in the root directory and clearing the FAT. Physical clusters are marked as being free clusters, and virtual clusters may be marked as being bad clusters. 
     Virtual clusters are converted to stub locations when they are read. Stub locations include a directory list stub and a media stub, such as an MP3 stub. A directory list stub includes a file with a place holder message such as “file is currently being downloaded, download will be complete within xx seconds”, as described hereinabove. A virtual cluster is mapped to an appropriate stub location in the flash memory in such a way that distinct virtual clusters correspond to distinct stub files. 
     Clusters 31 and 37 in  FIG. 13  are directory list stubs. Clusters 44-46, clusters 50-52 and clusters 59-60 are media stubs. Media stubs are cluster chains that end at an EOF cluster. Clusters 44-46 and clusters 50-52 correspond to an MP3 stub, and cluster 59-60 corresponds to an MP4 stub. Clusters 32-36, 38-43, 47-49 and 53-58 are marked as bad clusters. It is noted that MP3 stubs are generally identical, since they generally contain the same place holder message. More generally, media stubs for a specific media type, such as MP3 stubs, JPG stubs or MP4 stubs, are identical. 
     The number of virtual clusters that are defined equals N*M, where N is the maximum number of concurrent stubs required, and M is the maximum number of clusters for stub data. Typically, one cluster is used for a directory list stub, and 50 clusters, corresponding to 100 KB, are used for a media stub. For simplicity,  FIG. 13  is drawn with N=5 and M=6. In practice, reasonable values for N and M are 256 and 64, respectfully, and accordingly the number of virtual clusters is 2^14. As such, the virtual clusters require 32 KB for their FAT entries. 
     A portion of the flash memory, designated in  FIG. 13  as “STUB STORAGE AREA”, that contains M clusters is used to stub file data and is not mapped to the file system. Only SD controller  112  can access this storage area of the flash memory. The M clusters in the stub storage area are hidden clusters; specifically, they are physical clusters in the flash memory but they are not mapped directly on the FAT. When virtual clusters are read, the virtual cluster locations are converted to hidden cluster locations. 
     Stub files have valid directory entries, which point to virtual clusters as the first file cluster. All subsequent clusters in the stub files are also virtual clusters. Referring to  FIG. 13 , clusters 44-46, clusters 50-52 and clusters 59-60 are cluster chains for stub files. Each stub file points to a different virtual cluster, although they may contain the same stub data. Consequently, SD controller  112  knows which file to download based upon the virtual sector number requested by enhanced function device  300 . Specifically, the hidden sector number to read from the stub storage area is V (mod 4M), where V is the virtual sector offset inside the virtual sector area. The term 4M arises from the 4 sectors per cluster. More generally, if there are K sectors per cluster, then the hidden sector number to read is V (mod K*M). 
     When a remote file or stream is downloaded, it is stored on wireless communicator  100  in a FAT cluster chain, just as a local file is stored. However, the directory entry for the file does not point to the first cluster in the chain. A download map from virtual cluster number to {file name, file type, pointer to file on remote server, first real cluster} is used to maintain a list of all current stub files, including files in stub mode and files in downloading mode. Links that can be clicked on by a user have entries in the download map, along with a stub file directory entry with a file type of the form DIRECTORY, MP3, MP3_STREAM, or such other media type. When a file is finished being downloaded, it is removed from the download map. 
     Shown in  FIG. 13  is a download map with entries for two directories and two MP3 files, corresponding to the stubs in the root directory. The MP3 files being downloaded are currently stored in clusters 7-9 and clusters 23 and 24. 
     Reference is now made to  FIG. 14 , which is a simplified flowchart of a method for downloading a file from a remote server to wireless communicator  100  in accordance with an embodiment of the present invention. To supplement  FIG. 14 , reference is also made to  FIGS. 15A-15D , which are snapshots of a user interface and a file system for a simple example use case, during various stages of file download during operation of the method of  FIG. 14  in accordance with an embodiment of the present invention. Each of  FIGS. 15A-15D  are divided into three portions. The leftmost portion illustrates a user interface, the middle portion illustrates directory entries and the download map, and the rightmost portion illustrates the FAT. Thus, whereas  FIG. 14  describes the steps being performed, the accompanying  FIGS. 15A-15D  illustrate states of the user interface and the file system during various ones of the steps. The legends for the cross-hatching on the FATs in  FIGS. 15A-15D  are the same as the legend provided in  FIG. 13 . It will be appreciated by those skilled in the art that the file system illustrated in  FIGS. 15A-15D  is simplified, in order to emphasize the workings of an embodiment of the present invention. 
     Referring to  FIG. 14 , in general at step  1205 , SD application  208  analyzes a downloaded directory file for new stub files to create. The directory content is recursively searched by SD application  208 . For each file discovered a directory listing stub or media stub is created, corresponding to the file type. 
       FIG. 15A  corresponds to an initial stage wherein a user is browsing a downloaded remote directory listing, as shown in the leftmost portion of  FIG. 15A . At this stage, the root directory has entries for two stub directories; namely, a “jazz” stub directory at virtual cluster 31, and a “rock” stub directory at virtual cluster 37. The root directory also has entries for two local files; namely, a movie stored at clusters 1-6, and a pop song stored at clusters 7-9. The download map has URL entries for two remote directories; namely, a “jazz” directory at virtual cluster 31 has URL http://music.com/jazz, and a “rock” directory at virtual cluster 37 has URL http://music.com/rock. 
     Reference is now made to  FIG. 16 , which is a simplified flowchart of a method for generating a stub file in step  1205  of  FIG. 14  in accordance with the present invention. At step  1310 , SD application  208  searches the virtual clusters in the FAT, such as clusters 31-60 in  FIG. 15A , for the first free row; namely, the first row with clusters marked as bad clusters. At step  1320  the first applicable cluster in the row found at step  1310  is set as the first cluster of the stub file, according to the type of stub file. Specifically, for the example FAT shown in  FIG. 13 , the applicable cluster for directory list stubs is the first cluster in the row, for MP3 stubs is the second cluster in the row, and for MP4 stubs is the fifth cluster in the row. Such an arrangement ensures that the different types of stubs correspond to different hidden cluster in the sub storage area. 
     At step  1330 , SD application  208  allocates additional virtual clusters, as required for storing the stub file, and the additional virtual clusters are chained to the first virtual cluster. Such virtual cluster chains are shown in  FIG. 13B  as clusters 44-46 and clusters 50-52. Finally, at step  1340 , SD application  208  modifies the directory entry for the stub file, so that the first cluster of the stub file points to the first cluster from step  1320 , and so that the size of the stub file matches the actual length of the stub file. 
     At step  1210 , enhanced function device  200  refreshes and identifies the newly-downloaded directory listing. At step  1215  a determination is made whether a file is to be downloaded. If so, processing advances to step  1225 . Otherwise, processing ends. 
     As shown in  FIG. 15A , the user clicks on the “jazz” directory. Momentarily, a place holder message “downloading file list please wait” appears on the user interface. The place holder message is stored in the stub storage area, as shown in  FIG. 13 , in the hidden cluster corresponding to cluster 31. In the meantime, enhanced function device  200  downloads the remote file list for the “jazz” directory, and displays the list shown at the top of the leftmost portion of  FIG. 15B . The list contains two files; namely, a “benny goodman” MP3 file, and a “louis armstrong” MP3 file. 
     At this stage, the root directory includes a local directory for the “jazz” directory at data cluster 13. A “jazz” directory is generated, and includes entries for two stub MP3 files; namely, a stub MP3 file at virtual cluster 44, and a stub MP3 file at virtual cluster 50. The download map includes URLs for the remote “benny goodman” and “louis armstrong” files. The user clicks on “benny goodman” to initiate download of that file. 
     Referring back to  FIG. 14 , in general at step  1220  enhanced function device  200  issues a file read request to the SD file system. The request is transmitted to SD driver  207 . SD driver  207  determines from the FAT, which appropriate cluster to read, and finds the cluster value, which corresponds to a virtual cluster. Enhanced function device  200  is unaware that the cluster value corresponds to a non-physical cluster, and interprets the value as a legitimate cluster value. 
     At step  1225 , SD driver  207  transmits the read request to SD slave controller  112 . SD driver  212  converts the virtual cluster value to a virtual sector value, using a conversion of the form K*V+constant, and issues a read request to the virtual sector. As above, the parameter K is the number of sectors per cluster. 
     At step  1230 , SD slave controller  112  receives the read request. In response, SD slave controller  112  sends a command to SD application  208  including the virtual sector value, and returns the corresponding hidden sector value to enhanced function device  200 , using the formula hidden_sector=virtual_sector (mod(K*M). 
     At step  1235 , SD application  208  receives the event from SD slave controller  112 , and converts the sector value to a URL, or to another such pointer to a file on a remote server, using the download map. SD application  208  then issues an HTTP GET command, or such other download command, to retrieve the remote file. This operation is performed only once, when the first sector of the file is read. 
     At step  1240 , SD driver  207  retrieves the stub data. Enhanced function device  200  is unaware that this data belongs to a stub file. The length matches the file length in the directory listing, to ensure consistency. The data is displayed to the user, and includes a message such as “file is currently being downloaded, download will be complete within xx seconds”. Generally, the message is refreshed by enhanced function device  200 . In circumstances where enhanced function device  200  does not refresh, the SD card forces a refresh every 2-3 seconds by a refresh operation, or by a disconnect/connect operation using the SD protocol. 
     Referring to  FIG. 15B , in this embodiment the place holder message “Please wait, file is downloading” from the stub file is played to the user. It Will be appreciated by those skilled in the art the place holder messages may be displayed to a user as a still image or video clip, or played as an audio file, or both. In one embodiment, the place holder message is the same media type as the file that is corresponds to; i.e., audio messages are played when audio files are being downloaded, and video messages are played when video files are being downloaded. 
     Referring to  FIG. 15C , the file being downloaded is stored in physical clusters 15, 16, 17, etc. This is reflected in the entry for the “benny goodman” file in the download map, where cluster 15 is designated. 
     Referring back to  FIG. 14 , in general at step  1245  SD application  208  receives the real file content and stores it in the flash memory. The file is downloaded via baseband modem  120 . As it arrives, SD application  208  updates the download map for the file with the amount of data received, and updates the first cluster in the cluster chain for the file in the flash memory. Each cluster of the downloaded file is stored in a free cluster in the flash memory, which is then marked as full. Thus it will be appreciated by those skilled in the art that as the file is downloaded a regular file is generated in the FAT, but without a directory item for the file. Instead, the first sector of the file is stored in the download map. 
     At step  1250  enhanced function device  300  refreshes the file list. At step  1255  a determination is made whether or not the download for the file is complete. If not, processing returns to step  1245  where SD application  208  continues to download the file. Otherwise, if the download is complete then, at step  1260 , SD application  208  marks the last cluster of the downloaded file with an EOF. 
     At step  1265 , SD application  208  points the first cluster of the file to the downloaded data cluster chain. SD application  208  replaces the directory entry for the file from the virtual cluster value to the physical first cluster of the newly downloaded file. As such, the file entry now points to a legitimate file. The file size is also changed, so as to correspond to the received file length. The file is then removed from the download map. 
     Referring to  FIG. 15D , when enhanced function device  200  refreshes, the user interface displays the new file, and the user listens to the real Benny Goodman song. The downloaded file is now stored in clusters 15-21, and cluster 21 is marked with an EOF. The downloaded file now appears as a local file in the “jazz” directory, and its entry is removed from the download map. 
     Reference is now made to  FIG. 17 , which is a simplified flowchart of a method for playing a streamed file from wireless communicator  100  in accordance with an embodiment of the present invention. At step  1410 , enhanced function device  200  accesses a media stub. At step  1410  the stream data associated with the media stub begins downloading, and is dynamically stored in physical file clusters as it arrives, such as file clusters 7-9 in  FIG. 13 . SD application  208  waits until sufficient data arrives to play a few seconds&#39; worth of the media. Then, at step  1430 , SD application  208  links the downloaded file to the FAT. The file size is reported as being extremely long. At step  1440 , SD application  208  continues to write new clusters of data, as the stream if downloaded for several more seconds. At step  1450 , the FAT cluster link becomes circular, and SD application  208  loops back to the first stored cluster for the file. 
     In this regard, reference is now made to  FIG. 18 , which is an illustration of file streaming using a circular cluster cycle in the FAT in accordance with an embodiment of the present invention. The cross-hatched clusters in  FIG. 18  correspond to the FAT legend provided in  FIG. 10 . 
     Referring back to  FIG. 17 , at step  1460  a determination is made whether or not the user has stopped listening to the stream. Such a determination may be made by SD application  208 , by identifying a lack of access by enhanced function device  200  to the file clusters. If the user has not stopped listening to the stream, then processing returns to step  1440  as more data is streamed. Otherwise, if the user has stopped listening to the stream then, at step  1470 , enhanced application  208  updates the FAT to point to a stub in the virtual memory, and frees up all clusters that have been designated for the streamed file. 
     In addition to downloading of remote files to wireless communicator  100 , application  208  may also upload files from wireless communicator  100  to a remote server, and store them in a designated directory. SD application  208  may create a directory named “uploads” under the root directory, when the file system of wireless communicator  100  is initialized. The “uploads” directory is generated as a directory list stub in the virtual storage area, and includes a single data cluster. The “uploads” directory is initially set as an empty directory. 
     Reference is now made to  FIG. 19 , which is a simplified flowchart of a method for uploading a file from wireless communicator  100  to a remote server in accordance with an embodiment of the present invention. To supplement  FIG. 19 , reference is also made to  FIGS. 20A and 20B , which are snapshots of a user interface and a file system for a simple example use case, during various stages of file upload during operation of the method of  FIG. 19  in accordance with an embodiment of the present invention.  FIG. 20A  is divided into three portions. The leftmost portion illustrates a user interface, the middle portion illustrates directory entries and the upload map, and the rightmost portion illustrates the FAT.  FIG. 20B  is divided into two portions. The left portion illustrates directory entries and the upload map, and the right portion illustrates the FAT. Thus, whereas  FIG. 19  describes the steps being performed, the accompanying  FIGS. 20A and 20B  illustrate states of the user interface and the file system during various ones of the steps. The legends for the cross-hatching on the  FIGS. 20A and 20B  are the same as the legend provided in  FIG. 13 . It will be appreciated by those skilled in the art that the file system illustrated in  FIGS. 20A and 20B  is simplified, in order to emphasize the workings of an embodiment of the present invention. 
     Referring to  FIG. 19 , in general at step  1510 , when enhanced function device  200  is instructed to upload a file to a remote server, it creates a new file in a virtual directory named “uploads”. At step  1520 , SD slave controller  112  identifies a write request to the “uploads” directory. SD slave controller  112  may identify such request, since enhanced function device  200  issues the write request to a virtual cluster number. SD controller then sends an, event to SD application  208 . 
     At step  1530 , the host&#39;s write request is re-directed to a hidden sector that holds the “uploads” directory listing content. SD application  208  recognizes that a new file is being created in the “uploads” directory, and it allows enhanced function device  200  to write the file content. At step  1540  the file content is written to the file created in the “uploads” directory. The file itself is treated as a regular file in the file system. 
       FIG. 20A  corresponds to a stage where the upload directory listing is displayed in the user interface, and a user has selected a file name “recording.mp3” for upload. As shown in  FIG. 20A , the root directory has an entry for a stub uploads directory located at virtual cluster 36. The root directory also has an entry for the music file “recording.mp3”, which is stored at clusters 1-6. 
       FIG. 20B  corresponds to a stage where the selected file is copied to the physical storage area, and the upload process begins. Referring to  FIG. 20B , there is now an “uploads” directory with an entry for the file “recording.mp3” having first cluster 7. 
     At step  1550 , SD application  208  determines whether or not enhanced function device  200  has finished writing the file and has closed the file. If not, processing returns to step  1540 . If enhanced function device  200  has closed the file, then at step  1560  SD application  208  initiates a communication session with the remote server, and at step  1570  SD application  208  sends the file content to the remote server. 
     At step  1580 , SD application  208  determines whether or not the file has been successfully delivered to the remote server. If not, processing returns to step  1570 . If the file has been successfully delivered to the remote server, then at step  1590  the file is removed from the file system and from the outgoing directory listing. 
     3. Auto-Adaptation 
     Embodiments of the present invention provide methods and systems for maintaining a unified user interface look &amp; feel when wireless communicator  100  is pouched with enhanced function device  200 . Using the present invention, a user experiences the same-looking interface when he switches from the enhanced function device configuration screen to the wireless communicator configuration screen. Both screens have the same look &amp; feel, and wireless communicator  100  appears transparent to the user and does not appear as a foreign device. 
     Using the present invention, wireless communicator  100  is aware of the specific enhanced function device  200  with which it is pouched, and adapts its screen graphics to parent user interface  270 . As such, the same user interface displays both the enhanced function device and the wireless communicator configurations and a unified look &amp; feel is maintained. 
     The present invention is of particular advantage with multi-source systems where many different types of wireless communicator  100  can be pouched with many different types of enhanced function devices  200 . Methods of the present invention ensure that the user experiences a homogenous look &amp; feel in each enhanced function device  200 , when he navigates from the enhanced function device configuration screen to the wireless communicator configuration screen. 
     Embodiments of the present invention provide methods and systems for on-line configuration of controlled software, which flexibly support wireless communicator  100  pouched with one of multiple enhanced function devices  200  yet retain the same operational control over wireless communicator  100 , and which adapt the look &amp; feel so as to integrate the wireless communicator control software in the enhanced function device software environment in a homogeneous way. Enhanced function device  200  is used to configure the pouched system, and parent user interface  270  is maintained as a fixed point of reference for the user. Adaptation to the parent user interface  270  is carried out in wireless communicator  100 . 
     The look &amp; feel of a user interface relates to visual elements that a user experiences when he interacts with the interface. The look &amp; feel includes inter alia:
         screen size (pixel width and height);   font type, font size, font color and other visual font characteristics;   background color and background pattern (e.g., BMP or JPG image, or multiple images for animation);   menu type (e.g., scroll with items selected marked by highlight or zoom);   transitional entry effects (e.g., flip, zoom);   screen and button topology (e.g., location of specific buttons on the screen, such as the X button at the top-right corner of a window for closing the window);   menu topology (e.g., location of items in a specific menu); and   screen template (e.g., usage and position of general progress keys, such as Next, Back, Cancel and Enter).       

     In accordance with an embodiment of the present invention, look &amp; feel parameters may be defined in an XML document. Such an XML document may, for example, take the form provided below. 
     
       
         
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
               
               
             
           
               
                   
               
               
                 Sample XML document with look &amp; feel parameters 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 &lt;definitions&gt; 
               
               
                   
                 &lt;screen&gt; 
               
             
          
           
               
                   
                 &lt;size=800*600&gt; 
               
               
                   
                 &lt;touch=yes&gt; 
               
               
                   
                 &lt;layout=portrait&gt; 
               
               
                   
                 &lt;color quality=32 bit&gt; 
               
               
                   
                 .... . 
               
             
          
           
               
                   
                 &lt;/screen&gt; 
               
               
                   
                 &lt;background&gt; 
               
             
          
           
               
                   
                 &lt;color = black&gt; 
               
               
                   
                 &lt;pattern = none&gt; 
               
               
                   
                 .... . 
               
             
          
           
               
                   
                 &lt;/background&gt; 
               
               
                   
                 &lt;fonts&gt; 
               
             
          
           
               
                   
                 &lt;font1&gt; 
               
             
          
           
               
                   
                 &lt;color=yellow&gt; 
               
               
                   
                 &lt;size=16&gt; 
               
               
                   
                 &lt;type=bold italic&gt; 
               
               
                   
                 ...... 
               
             
          
           
               
                   
                 &lt;/font1&gt; 
               
               
                   
                 &lt;font2&gt; 
               
             
          
           
               
                   
                 &lt;color=blue&gt; 
               
               
                   
                 &lt;size=12&gt; 
               
               
                   
                 &lt;type=regular&gt; 
               
             
          
           
               
                   
                 ...... 
               
               
                   
                 &lt;/font2&gt; 
               
               
                   
                 ... 
               
             
          
           
               
                   
                 &lt;/fonts&gt; 
               
               
                   
                 ... 
               
               
                   
                 &lt;buttons&gt; 
               
             
          
           
               
                   
                 &lt;button1&gt; 
               
             
          
           
               
                   
                 &lt;location=bottom left&gt; 
               
               
                   
                 &lt;icon=”left_arrow.jpg”&gt; 
               
             
          
           
               
                   
                 &lt;/button1&gt; 
               
               
                   
                 &lt;button2&gt; 
               
             
          
           
               
                   
                 &lt;location=bottom right&gt; 
               
               
                   
                 &lt;icon=”right_arrow.jpg”&gt; 
               
             
          
           
               
                   
                 &lt;/button2&gt; 
               
             
          
           
               
                   
                 &lt;/buttons&gt; 
               
               
                   
                 ... 
               
               
                   
                 &lt;/definitions&gt; 
               
               
                   
                   
               
             
          
         
       
     
     Reference is now made to  FIGS. 21A and 21B ,  FIGS. 22A and 22B , and  FIGS. 23A and 23B , which are displays of various configuration screens for enhanced function device  200  and wireless communicator  100 , pouched together, wherein displays  185  and  285  are controlled so as to have the same look &amp; feel, in accordance with an embodiment of the present invention. The enhanced function device shown in  FIG. 21A  is a media player, such as an MP3 player. Shown in  FIG. 21A  is a sample parent user interface  270 . The screen shown in  FIG. 21A  corresponds to the enhanced function device configuration screen, before wireless communicator  100  is pouched to enhanced function device  200 , and the screen shown in  FIG. 21B  corresponds to the enhanced function device configuration screen, after wireless communicator  100  is pouched to enhanced function device  200 . It is noted that both configuration screens have the same look &amp; feel. Specifically, when wireless communicator  100  is pouched to enhanced function device  200 , the displayed font size, type and color remain the same, and the screen size and background color remain the same. 
     In addition, the screen template is preserved for two “soft-keys”  281  and  282  and a bar  283  above them that includes their corresponding function names. Soft keys are multi-function keys that use part of a display to identify their function at any moment. Soft-keys are generally located directly below the display. In  FIG. 21A  soft keys  281  and  282  correspond respectively to Vol. Up and Vol. Down functions, as indicated by bar  283 ; and in  FIG. 20B  soft keys  281  and  282  correspond respectively to Call and End functions, respectively, as indicated by bar  283 . 
     The enhanced function device shown in  FIG. 22A  is a digital camera. Shown in  FIG. 22A  is a sample interface for enhanced function device  200 . Again, in accordance with the present invention, the look &amp; feel of  FIG. 22B , namely, the wireless communicator configuration, is the same as that of  FIG. 22A , namely, the enhanced function device configuration. As may be seen in  FIGS. 22A and 22B , the look &amp; feel of the configuration interface includes a left panel  286  and a right panel  287 . The left panel  286  is created by enhanced function device  200 . When wireless communicator  100  is pouched to enhanced function device  200 , the left panel may be altered by enhanced function device  200 . Thus in  FIG. 22B  the left panel includes a new control element  288  in the shape of a star, for toggling between parent functionality mode and native functionality mode. 
     Right panel  287  is controlled by enhanced function device  200  when the parent functionality mode is running, and controlled by wireless communicator  100  when the native functionality mode is running. In either case, the content displayed in the right panel conforms to the look &amp; feel parameters for the host. The “look parameters” of right panel  287 , including inter alia the dimensions of right panel  287 , its background color, its font type, size and color, and its menu header and location, are the same in  FIGS. 22A and 22B . Similarly, the “feel” parameters of right panel  287 , including inter alia assignment of client options 1, 2 and 3 to corresponding host buttons and the jog dial options, are also the same in  FIGS. 22A and 22B . 
     The enhanced function device shown in  FIG. 23A  is a GPS navigator. Shown in  FIG. 23A  is a sample interface for enhanced function device  200 . Again, in accordance with the present invention, the look &amp; feel of  FIG. 23B , namely the native wireless communication configuration, is the same as that of  FIG. 23A , namely the parent functionality configuration. It is noted, for example, that the “X” remains in the top right corner when wireless communicator  100  is pouched with enhanced function device  200 . 
     More generally, reference is now made to  FIG. 24 , which is a simplified block diagram of a system with a uniform interface for configuring wireless communicator  100  and enhanced function device  200  in accordance with an embodiment of the present invention. Shown in  FIG. 24  is enhanced function device  200 , with its pouching controller  210 , its display  285  and its optional power management subsystem  225 . Enhanced function device  200  has its own look &amp; feel parameters  216  stored therein. In accordance with an embodiment of the present invention, requisite font files are also stored with look &amp; feel parameters  216 . 
     Also shown in  FIG. 24  is wireless communicator  100 , with its pouching controller  110 , its optional display  185  and its power management subsystem  125 . Wireless communicator  100  also includes a configuration program  114 , which enables a user to select configuration settings for wireless communicator  100 . 
     Enhanced function device  200  and wireless communicator  100  communicate via respective pouch connectors  260  and  160  over a communication channel. The communication channel may be a physical or a wireless channel. Parent look &amp; feel parameters  216  are transmitted by pouch connector  260  over the communication channel, and received by pouch connector  160 . In turn, the parent look &amp; feel parameters are transmitted to configuration program  114 , the transmission being controlled by corresponding pouching controllers  110  and  120 . 
     Configuration program  114  has a native look &amp; feel. In accordance with an embodiment of the present invention, configuration program  114  adapts its look &amp; feel accordingly, so as to conform to parent look &amp; feel parameters  216  of enhanced function device  200 . Configuration program  114  generates a graphics screen image that conforms to parent look &amp; feel parameters  216 . The graphics screen image is transmitted to pouch connector  160 , and is further transmitted to pouch connector  260  over the communication channel. The graphics image is then transmitted to display  285 , for display to a user. 
     As the user interacts with the displayed graphics image and issues successive commands, the commands are transmitted via the communication channel back to configuration program  114 , which generates successive graphics screen images in response to the user commands. The successive graphics screen images, based again on parent look &amp; feel parameters  216 , are transmitted to display  285  for further display to the user. 
     Pouching controllers  110  and  210  control transmission of the commands from enhanced function device  200  to wireless communicator  100 , and transmission of the graphics screen images from wireless communicator  100  to enhanced function device  200 . 
     Reference is now made to  FIG. 25A , which is a simplified flowchart of a first embodiment of a method for controlling a configuration interface for wireless communicator  100  so as to conform to the look &amp; feel of parent user interface  270  in accordance with an embodiment of the present invention. The flowchart of  FIG. 25A  is divided into three columns. The leftmost column indicates steps performed by a user who is operating a multi-source system including enhanced function device  200  and wireless communicator  100 . The middle column indicates steps performed by enhanced function device  200 , and the rightmost column indicates steps performed by wireless communicator  100 . 
     At step  1603  wireless communicator  100  is pouched to enhanced function device  200 . At step  1606  enhanced function device  200  transfers the look &amp; feel parameters for parent user interface  270 , to the client. As described hereinabove, the parent look &amp; feel parameters may be specified in an XML document. Enhanced function device  200  may also transfer requisite font files, for fonts specified in the look &amp; feel parameters. 
     At step  1609  wireless communicator  100  adapts the look &amp; feel of its configuration program according to the parent look &amp; feel parameters. At step  1612  the wireless communicator configuration program generates a configuration screen, in the form of a bitmap image, which conforms to the look &amp; feel of parent user interface  270 . 
     At step  1615  enhanced function device  200  receives the bitmap image of the configuration screen from wireless communicator  100 , and at step  1618  enhanced function device  200  displays the bitmap image, which conforms to the parent look &amp; feel. As such, the user interface displayed by enhanced function device  200  preserves a unified look &amp; feel, even when being used to configure wireless communicator  100 . 
     It may thus be appreciated that enhanced function device  200  displays its own configuration options and wireless communicator  100  configuration options on the same screen, and with a common look &amp; feel. Enhanced function device  200  may display both configurations at the same time, or may switch between the parent options and the native options, but in each case the same visual user interface is presented to the user. 
     At step  1621  the user interacts with the system and issues a command, the response to which may require a change in the display screen. At step  1624  enhanced function device  200  sends to wireless communicator  100  a notification of the user command. At step  1627  the wireless communicator configuration program generates a new bitmap image for a configuration screen, in response to the user command, as appropriate. At step  1630  enhanced function device  200  receives the new configuration screen, in the form of the new bitmap image, from wireless communicator  100 . Finally, at step  1633  enhanced function device  200  displays the altered screen, which again conforms to the look &amp; feel of the parent. The method then returns to step  1621 , as the user continues to interact with the system. 
     Reference is now made to  FIG. 25B , which is a simplified flowchart of a second embodiment of a method for controlling a configuration interface for wireless communicator  100  so as to conform to the look &amp; feel of parent user interface  270 , in accordance with an embodiment of the present invention. The flowchart of  FIG. 25B  is divided into three columns. The leftmost column indicates steps performed by a user who is operating a multi-source system including wireless communicator  100  and enhanced function device  200 . The middle column indicates steps performed by enhanced function device  200 , and the rightmost column indicates steps performed by wireless communicator  100 . The method of  FIG. 25B  uses a web interface for a user to configure wireless communicator  100 . 
     At step  1636  wireless communicator  100  is pouched to enhanced function device  200 . At step  1639  enhanced function device  200  transfers the look &amp; feel parameters for parent user interface  270  to wireless communicator  100 . Enhanced function device  200  may also transfer requisite font files, for fonts specified in the parent look &amp; feel parameters. At step  1642  the wireless communicator configuration program sets it parameters according to the parent look &amp; feel parameters. 
     At step  1645  the wireless communicator configuration program generates a web page, which conforms to the parent look &amp; feel parameters. At step  1648  wireless communicator  100  uploads the web page to a URL on a web server. At step  1651  enhanced function device  200 , using a web browser installed therein, browses the URL and renders and displays the web page. 
     Referring back to  FIG. 24 , in this second embodiment enhanced function device  200  includes a web browser  295 , which browses and renders web pages stored in a web server  395 . The web pages are generated by configuration program  114  so as to comply with parent look &amp; feel parameters  216 , and are uploaded to web server  395 . 
     Proceeding now with  FIG. 25B , at step  1654  a user who is viewing the web page displayed at step  1651  issues a user command. At step  1657  enhanced function device  200  sends the user command to wireless communicator  100 . At step  1660  the wireless communicator configuration program generates a new web page, in response to the user command, as appropriate. At step  1663  wireless communicator  100  uploads the web page to a URL on the web server. At step  1666  enhanced function device  200  browses the URL and renders and displays the new web page. The method then returns to step  1654 , as the user continues to interact with the system. 
     Reference is now made to  FIG. 25C , which is a simplified flowchart of a third embodiment of a method for controlling a configuration interface for wireless communicator  100  so as to conform to the look &amp; feel of parent user interface  270 , in accordance with an embodiment of the present invention. The flowchart of  FIG. 25C  is divided into three columns. The leftmost column indicates steps performed by a user who is operating a multi-source system including enhanced function device  200  and wireless communicator  100 . The middle column indicates steps performed by enhanced function device  200 , and the rightmost column indicates steps performed by wireless communicator  100 . 
     At step  1669  wireless communicator  100  is pouched to enhanced function device  200 . At step  1672  wireless communicator  100  transfers its configuration program to enhanced function device  200 , thus enabling enhanced function device  200  to generate the appropriate user interfaces. 
     At step  1675  enhanced function device  200  sets parameters of the wireless communicator&#39;s configuration program corresponding to the look &amp; feel parameters of parent user interface  270 . At step  1678  enhanced function device  200  by itself generates a screen image for wireless communicator configuration, running the wireless communicator&#39;s configuration program. At step  1681  enhanced function device  200  displays the screen image. 
     At step  1684  a user who is viewing and interacting with the user interface issues a command. At step  1687  enhanced function device  200  generates a new screen image, in response to the user command, as appropriate, running the wireless communicator&#39;s configuration program. At step  1690  enhanced function device  200  displays the new screen image. The method then returns to step  1684 , as the user continues to interact with the system. 
     It will thus be appreciated by those skilled in the art that the methods of  FIGS. 25A ,  25 B and  25 C enable wireless communicator  100  to display both parent configuration settings and native configuration settings on enhanced function device screen  285 , simultaneously, with a uniform look &amp; feel. As such, a user of the system experiences a homogeneous interface, and it is transparent to the user that two different standalone devices are operating. 
     Shown in TABLES IIA and IIB are example button key assignments for a host mode and a client mode, respectively, within a multi-source system. TABLES IIA and IIB correspond to  FIGS. 21A and 21B , respectively, where the enhanced function device is an MP3 player running in media player mode. The buttons of the system are labeled B1-B15, together with a TOUCH button on the touch screen displayed with a question mark. The buttons have one assignment of functions in host mode and another assignment of functions in client mode. Button B8, for example, is assigned a play function in TABLE IA, and is assigned a function to enter the numeral “8” in TABLE IIB. 
     Reference is now made to  FIG. 26 , which is an illustration of button keys that have different key assignments for parent mode and native mode, but a common look &amp; feel user interface for setting the wireless communicator and the enhanced function device configuration parameters in accordance with an embodiment of the present invention. As shown in  FIG. 26 , buttons B1-B12 correspond to the four rows of three buttons on the keypad, in the order from top left to bottom right. Buttons B13 and B14 correspond to the soft keys  281  and  282  in  FIGS. 21A and 21B . Button B15 corresponds to a speaker button. 
     It is also noted that buttons B4, B6, B13 and B14 have dual functions, corresponding to a short duration press and a long duration press. Key-press and key-release events may be analyzed so as to distinguish between long duration and short duration presses. 
     When running in parent mode, the key assignments correspond to media player key assignments, as in TABLE IIA. However, when running in native mode, the key assignments correspond to conventional cell phone key assignments, as in TABLE IIB. It may be seen from TABLE IIA that in parent mode, buttons B5 and B15 are not used, and long button presses are not distinguished from short presses. 
     
       
         
               
             
               
               
               
               
             
           
               
                 TABLE IIA 
               
             
             
               
                   
               
               
                 Parent Key Assignments 
               
             
          
           
               
                   
                 Screen 
                 Function 
                 Assigned Key 
               
               
                   
                   
               
               
                   
                 Media 
                 Play 
                 B8 
               
               
                   
                 Player 
                 Stop 
                 B11 
               
               
                   
                 Mode 
                 Next 
                 B9 
               
               
                   
                   
                 Prev 
                 B7 
               
               
                   
                   
                 FWD 
                 B12 
               
               
                   
                   
                 BKD 
                 B10 
               
               
                   
                   
                 Record 
                 B2 
               
               
                   
                   
                 Vol. Up 
                 B13 
               
               
                   
                   
                 Vol. Down 
                 B14 
               
               
                   
                   
                 Up 
                 B1 
               
               
                   
                   
                 Down 
                 B3 
               
               
                   
                   
                 Right 
                 B6 
               
               
                   
                   
                 Left 
                 B4 
               
               
                   
                   
                 Help 
                 TOUCH 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
             
           
               
                 TABLE IIB 
               
             
             
               
                   
               
               
                 Native Key Assignments 
               
             
          
           
               
                   
                 Screen 
                 Function 
                 Assigned Key 
               
               
                   
                   
               
               
                   
                 Dialer 
                 0 
                 B11 
               
               
                   
                 Mode 
                 1 
                 B1 
               
               
                   
                   
                 2 
                 B2 
               
               
                   
                   
                 3 
                 B3 
               
               
                   
                   
                 4 
                 B4 
               
               
                   
                   
                 5 
                 B5 
               
               
                   
                   
                 6 
                 B6 
               
               
                   
                   
                 7 
                 B7 
               
               
                   
                   
                 8 
                 B8 
               
               
                   
                   
                 9 
                 B9 
               
               
                   
                   
                 # 
                 B12 
               
               
                   
                   
                 * 
                 B10 
               
               
                   
                   
                 Left 
                 LONG B4 
               
               
                   
                   
                 Right 
                 LONG B6 
               
               
                   
                   
                 Call 
                 B13 
               
               
                   
                   
                 End 
                 B14 
               
               
                   
                   
                 Erase 
                 LONG B14 
               
               
                   
                   
                 Options 
                 LONG B13 
               
               
                   
                   
                 Speaker 
                 B15 
               
               
                   
                   
                 Help 
                 TOUCH 
               
               
                   
                   
               
             
          
         
       
     
     In accordance with the present invention, when wireless communicator  100  is not pouched to enhanced function device  200 , or when wireless communicator  100  is pouched to enhanced function device  200  but the pouched system is running in parent mode, the parent key assignments, such as those indicated in TABLE IIA, are used. Switching between parent mode and native mode may be performed, for example, using a toggle switch such as control element  288  in  FIG. 22B . When wireless communicator  100  is pouched to enhanced function device  200 , wireless communicator  100  sends enhanced function device  200  a list of user functions it supports, such as the various functions indicated in TABLE IIB. Enhanced function device  200  then assigns the functions to buttons, and sends wireless communicator  100  the key assignments. 
     When wireless communicator  100  is pouched to enhanced function device  200  and the pouched system is running in native mode, the graphic image displayed on display  285 , or a portion of the graphic image that is assigned to wireless communicator  100 , is generated by wireless communicator  100  and transmitted to enhanced function device  200  for display. When the user presses a button, the button press event is sent to wireless communicator  100 , and translated by wireless communicator  100  according to the key assignment for that button. If the user presses a touch screen, then the X-Y coordinates of the press location are sent to wireless communicator  100 . In response, wireless communicator  100  generates a new graphic image, conforming to the parent look &amp; feel parameters that wireless communicator  100  received from enhanced function device  200 . The new graphic image is transmitted to enhanced function device  200  for display, thus completing a cycle of user input and screen display in response to the input. Generally, several such cycles are performed in an interactive session. 
     When the key assignments distinguish between short and long duration presses, as in TABLE IIB, enhanced function device  200  performs the analysis to make the distinction and passes the result (long press or short press) to wireless communicator  100 . In an alternative embodiment, enhanced function device  200  may send the key-press and key-release events to wireless communicator  100 , and wireless communicator  100  then determines the type of press (long or short) from these events. 
     4. Parent User Interface Package 
     Embodiments of the present invention concern a handset body that can be dressed with a variety of physical exteriors, visual presentation characteristics and audible presentation characteristics, according to a user&#39;s tastes. Each such dressing, referred to herein as a “parent user interface (UI) package”, is a jacket housing to which wireless communicator  100  is pouched, and each such dressing provides a different all-around look &amp; feel. The parent UI package may include inter alia the physical appearance of the handset, the visual presentation of the handset, and the audible presentation of the handset 
     Generally, a parent UI package has a common theme. For example, a UI package may be themed to a celebrity, a TV show, or a soccer team. There may be a Barbie Doll UI package, a Harry Potter UI package, a Star Wars UI package, a Microsoft UI package, a Google UI package, etc. Thus a UI package for “The Simpson&#39;s” may include a yellow colored device with Simpson characters on the front and back, screen savers for Horner, Marge, Bart, Lisa and Maggie Simpson, and ring tones with the Simpson&#39;s theme song or other phrases or sounds related to the Simpson&#39;s. 
     The user interface package of the present invention uses storage  215 , embodied as EEPROM, to store data describing the look &amp; feel of a handset, and a mailbox for communicating with wireless communicator  100  when it is pouched with the parent UI package. 
     Reference is now made to  FIGS. 27A and 27B , which are illustrations of handset body dressed up in jacket housings  200  with two different parent user interface packages in accordance with an embodiment of the present invention. Each housing  200  includes a decorative shell, a decorative display  285  and a decorative keypad  280 . Each parent user interface package includes a keypad mapping with buttons assignments, as shown in  FIGS. 27A and 27B . 
     As seen in  FIGS. 27A and 27B , a parent UI package includes both physical and software-related look &amp; feel characteristics. Physical look &amp; feel characteristics relate to the exterior of a device, including inter alia its size, color, shape, weight, and interaction functionality such as keypad, touch screen, mouse and jog dial. Software-related look &amp; feel characteristics include inter alia display properties such as screen resolution, background color or template, font properties, menu appearance and screen saver, and audible properties such as ring tones and dial tones. 
     In accordance with an embodiment of the present invention, pouching controller  210  is coupled to display  285  using a display interface having an 8-bit parallel bus, similar to an 8080 or a 6800 controller bus. Pouching Controller  210  is coupled to input device  280  with a general purpose I/O interface that monitors state, or provides matrix scanning functionality, or both. Pouching Controller  210  is connected to wireless communicator  100  via pouch connector  260 . 
     EEPROM  215  stores information describing the parent UI package  200 , including inter alia
         display resolution, bits per pixel, and word size;   display specific initialization sequence and control;   keypad matrix size;   keypad mapping, such as the button assignments shown in  FIGS. 27A and 27B  that govern which key is mapped to which combination in the matrix;   preferred screen saver image or images; and   customization information for handset menu presentation.       

     In accordance with an embodiment of the present invention, pouching controller  210  implements a mailbox that is mapped to SD memory or SDIO memory, or to I/O space. Wireless communicator  100  and pouching controller  210  communicate via the mailbox. Pouching controller  210  notifies wireless communicator  100  that there are pending messages for wireless communicator  100  in the mailbox, by issuing an interrupt using either an SDIO defined in-band interrupt mechanism, or by using a dedicated line on the pouch connector, in addition to the SD bus signals. Examples of such messages are provided in TABLE III. 
     
       
         
               
             
               
               
             
           
               
                 TABLE III 
               
             
             
               
                   
               
               
                 Messages between wireless communicator and parent UI package 
               
             
          
           
               
                 Message 
                 Message Attributes 
               
               
                   
               
               
                 Write buffer to display 
                 Command/Date - identifying if this the message 
               
               
                   
                 is a command or data for display 
               
               
                   
                 Buffer length—size of buffer to write to display 
               
               
                   
                 Buffer content 
               
               
                 Read key 
                 Code of key pressed returned by controller 
               
               
                 Read EEPROM request 
                 Offset from start—offset in EEPROM memory 
               
               
                   
                 space 
               
               
                   
                 Number of bytes to read 
               
               
                 Read EEPROM response 
                 Content of EEPROM request provided by 
               
               
                   
                 controller 
               
               
                   
               
             
          
         
       
     
     It will be appreciated by those skilled in the art that the same wireless communicator  100  can be connected to various UI packages  200 , as shown in  FIGS. 27A and 27B , each of which presents a different look &amp; feel experience for the user. 
     In reading the above description, persons skilled in the art will realize that the present invention applies to other consumer electronic devices, in addition to wireless communicator  100 . Thus the present invention applies inter alia to producing theme-based packages, including decorative shells and user interfaces, for portable data assistants (PDA&#39;s), portable media players, digital cameras, camcorders and portable game stations. For each type of consumer electronic device, the parent UI package includes a decorative shell, a decorative display for output, a decorative keypad or other such device for input, EEPROM, a controller, and a connector for pouching a modular device. In addition, the controller includes a mailbox for communicating via messages between the controller and the modular device. 
     5. Bi-Directional Power Control 
     Embodiments of the present invention relate to power management and control between wireless communicator  100  and enhanced function device  200 . Using special circuitry, each device  100  and  200  is able to turn the other device on and off, by generating wakeup events at one device to power the other device on or off, over a single connection line. A circuit with a single connection line between wireless communicator  100  and enhanced function device  200  enables wireless communicator  100  to turn enhanced function device  200  on and off, and enhanced function device  200  to turn wireless communicator  100  on and off. The circuit uses the single connection line for wireless communicator  100  to generate wakeup events to power enhanced function device  200  on or off, and for enhanced function device  200  to generate wakeup events to power wireless communicator  100  on or off. A wakeup event is either a button press and release, or a switch being closed and released thereby changing its logical level from 1 to 0 and back to 1. 
     Reference is now made to  FIG. 28 , which is a simplified diagram of a circuit  400  that provides bi-directional power control in accordance with an embodiment of the present invention. Shown in  FIG. 28  is wireless communicator  100  pouched to enhanced function device  200  via pouch connectors  160  and  260 . Also shown in  FIG. 28  is wireless communicator modem  120 . 
     Wireless communicator  100  and enhanced function device  200  are battery-operated devices, and have their own batteries for power. Power sources for wireless communicator  100  and enhanced function device  200  are designated by VBAT_Comm and VBAT_Enhanced, respectively, in circuit  400 . Typical voltage ranges for the batteries are 4.2V for a fully charged battery, to 3.2V for a low battery. Circuit  400  uses an optional voltage level shifter  126  to control the potential voltage gap between power sources VBAT_Comm and VBAT_Enhanced. One of the device batteries may be full charged at 4.2V, for example, and the other may be at the low range of 3.2V. 
     Voltage level shifter  126  is powered from VBAT_Comm, and its output level is based on VBAT_Comm. Specifically, logical bit 1 corresponds to an output of VBAT_Comm, and logical bit 0 corresponds to an output level of zero voltage. Voltage level shifter  126  also manages I/O levels of wireless communicator  100 , which may differ from the level VBAT_Comm. 
     Circuit  400  includes grounds to protect the I/O units of the two devices from exposure to a high supply voltage, and to protect the devices&#39; power sources from being shorted to one another. 
     Wireless communicator  100  and enhanced function device  200  are assumed to have respective power management ICs  160  and  170  that power them on and off when wakeup events occur. Additionally, wireless communicator  100  and enhanced function device  200  are physically connected by a single line that enables each device to generate wakeup events to power the other device on and off. 
     Wireless communicator  100  and enhanced function device  200  are powered on and off independently; i.e., wireless communicator  100  is able to be turned on when enhanced function device  200  is turned on or off, and enhanced function device  200  is able to be turned on when wireless communicator  100  is turned on or off. Moreover, circuit  400  of  FIG. 28  enables wireless communicator  100 , when it is turned on, to turn enhanced function device  200  on and off; and enables enhanced function device  200 , when it is turned on, to turn wireless communicator  100  on and off. 
     In an embodiment of the present invention, enhanced function device  200  includes an internal watchdog timer which is used to turn on wireless communicator  100  after a predefined period of time. 
     Circuit  100  includes two on/off buttons,  127  and  227 , and two on/off switches,  128  and  229 , which cause each of wireless communicator  100  and enhanced function device  200  to power the other on or off. Buttons  127  and  227  are physical buttons that can be activated by a user. Switches  128  and  228  are electronic switches that are inaccessible to the user. Instead, switches  128  and  228  are controlled by respective controllers  120  and  205 . 
     Circuit  400  provides simultaneous and non-simultaneous power on/off control. Use of switch  128  to turn enhanced function device  200  on or off, does not affect regular operation of wireless communicator  100  and, vice versa, use of switch  228  to turn wireless communicator  100  on or off, does not affect regular operation of enhanced function device  200 . 
     Specifically, when operating alone, wireless communicator  100  is turned on and off by button  127 . When button  127  is pressed to turn on wireless communicator  100 , a wakeup event is detected in its power management system  125 . When wireless communicator is pouched to enhanced function device  200 , button  127  is generally physically inaccessible, and wireless communicator  100  can only be turned on simultaneously with enhanced function device  200 , via switch  128 , button  227  or switch  228 . 
     Similarly, when operating alone, enhanced function device is turned on and off by button  227 . When button  227  is pressed to turn on enhanced function device  200 , a wakeup event is detected in its power management system  225 . When wireless communicator  100  is pouched to enhanced function device  200 , enhanced function device  200  can be turned on asynchronously by button  227 , and can also be turned on synchronously with wireless communicator  100 , via switch  228 . 
     If enhanced function device  200  is a jacket device, instead of a host device, wireless communicator  100  is turned on and off via switch  228  on enhanced function device  200 , which generates a wakeup event for power management system  125 . 
     Power off events are generally reported to modem  120  and enhanced function device host controller  205  before each respective device is turned off. In a embodiment of the present innovation When button  227  is used to turn off one or both of wireless communicator  100  and enhanced function device  200 , button  227  must be pressed for a long press. The time duration of a press of button  227  is calculated in software, by host controller  205 , generally via telemetries that host controller  205  receives from enhanced function device power management subsystem  225 . 
     Similarly, when wireless communicator  100  is not pouched to enhanced function device  200 , button  127  is accessible, and may be used to turn wireless communicator  100  on and off. The time duration of a press of button  127  is calculated in software, by modem  120 , generally via telemetries that modem  120  receives from host power management subsystem  125 . 
     In an embodiment of the present invention pouching controllers within both wireless communicator  100  and enhanced function device  200 , are responsible for performing on/off events instead of modem  120  and power management system  225  and host controller  205 . 
     TABLE IV summarizes an embodiment of the simultaneous and non-simultaneous power on/off control enabled by button  227 , and switches  127  and  227 , when wireless communicator  100  is pouched to enhanced function device  200 . 
     
       
         
               
             
               
               
               
             
               
               
               
               
               
             
           
               
                 TABLE IV 
               
             
             
               
                   
               
               
                 Power on/off control when wireless communicator 100 is pouched to 
               
               
                 enhanced function device 200 
               
             
          
           
               
                 Before wakeup event 
                   
                 After wakeup event 
               
             
          
           
               
                 Enhanced 
                   
                   
                 Enhanced 
                   
               
               
                 device 
                 Communicator 
                   
                 device 
                 Communicator 
               
               
                 (200) State 
                 (100) state 
                 Wakeup event 
                 (200) State 
                 (100) state 
               
               
                   
               
               
                 Off 
                 Off 
                 Button 227 pushed 
                 On 
                 On 
               
               
                 On 
                 Off 
                 Switch 228 activated 
                 On 
                 On 
               
               
                   
                   
                 Button 227 pushed 
                 Off 
                 Off 
               
               
                 Off 
                 On 
                 Button 227 pushed 
                 On 
                 On 
               
               
                 On 
                 On 
                 Switch 228 activated 
                 On 
                 Off 
               
               
                   
                   
                 Button 227 pushed 
                 Off 
                 Off 
               
               
                   
               
             
          
         
       
     
     TABLE IV indicates that when switch  228  is activated to turn off wireless communicator  100 , enhanced function device  200  remains on. In such case enhanced function device  200  turns itself off in a different manner, as appropriate, not using switch  228 . 
     Circuit  400  is designed with grounds to protect the I/O units of the two devices from exposure to a high supply voltage, and to protect the devices&#39; power sources from being shorted to one another. Circuit  400  uses voltage level shifter  126  to manage the potential voltage gap between power sources of the two devices. One of the device batteries may be full charged at 4.2V, for example, and the other may be at the low range of 3.2V. Voltage level-shifter  126  also manages I/O levels of the devices, which may differ from the level of VBAT_Comm. 
     An advantage of circuit  400  is that it uses a single connection line between wireless communicator  100  and enhanced function device  200 , for carrying wakeup signals. 
     In reading the above description, persons skilled in the art will realize that some power management systems have two input signals for waking up a device. In such case, the on/off button of a device may be connected to one of its power management inputs, with the other power management input being used for a remote wakeup signal coming from another device. 
     6. Bi-Directional Battery Charging 
     Embodiments of the present invention relate to battery supply and battery charging of wireless communicator  100  and enhanced function device  200 . Each device  100  and  200  has its own rechargeable battery and internal battery charger, and the coupling enables the battery of one device to supply power to the other device, and to charge the other device&#39;s battery. Using the present invention, optimized logic for controlling power supply and battery charging of the pouched devices, provides extended operational time. 
     The optimized logic decides when to supply battery power from one battery to the other device, and when to charge one battery from the other, based on the voltages of the two batteries, and based on the operational modes of the two devices  100  and  200 . 
     The present invention applies generically to a wide variety of electronic devices that use single or dual input battery chargers, voltage boosts, and USB chargers to power manage their electrical components. 
     Referring back to  FIG. 6 , power management subsystem  125  of wireless communicator  100  includes circuitry for a battery charger, shown as element  124  in  FIGS. 28 and 30 . Battery charger  124  includes a power management integrated circuit. In accordance with an embodiment of the present invention, battery charger  124  supports fixed current and fixed voltage operational modes, and is capable of measuring voltage and current. Battery charger  124  is controlled by modem  120 . 
     Referring back to  FIGS. 7A and 7B , power management subsystem  225  of enhanced function device  200  includes circuitry for a battery charger, shown as element  224  in  FIGS. 28 and 30 . In accordance with an embodiment of the present invention, battery charger  224  supports both a fixed voltage mode and a fixed current mode. Battery charger  224  independently controls internal current and voltage of enhanced function device  200 . 
     Reference is now made to  FIG. 29 , which is a simplified block diagram of bi-directional battery charging for a simple enhanced function device  200 , in accordance with an embodiment of the present invention. Shown in  FIG. 29  are wireless communicator modem  120 , battery charger  124  and battery  145 . Battery charger  124  is a dual input charger. A first input is connected to USB connector  155  for a USB charger  156 , and a second input is connected to the output of a voltage boost  123 . 
     Also shown in  FIG. 29  are host controller  205 , battery charger  224 , and battery  245 . Battery charger  224  is a single input charger, with its input connected to USB connector  255  for a USB charger  256 . 
     Pouch connectors  160  and  260  provide signals paths between components of wireless communicator  100  and components of enhanced function device  200 . Via pouch connectors  160  and  260 , the input of USB charger  266 , denoted by Vbus in  FIG. 29 , is routed to USB charger  166 . 
     Modem  120  is able to track the voltage on battery  245 , either by directly measuring a battery pin on pouch connector  160 , or by receiving notifications from battery charger  224  via pouch connectors  160  and  260 . 
     In an embodiment of the present invention pouching controllers  110  and  210  report the notification to the modem  120 . 
     Voltage boost  123  receives a standard battery voltage as input and generates as output a minimal charging voltage of battery charger  124 . Typical input to boost  123  is in the range 2.7V-4.2V, and typical output is 4.7V. When enabled, boost  123  up-converts its input voltage. When disabled, boost  123  simply passes its input voltage through to its output, minus any internal voltage drop. Preferably Boost  123  is enabled by modem  120  via an enable signal. The input of boost  123  is connected to a pin of pouch connecter  160 , such that when wireless communicator  100  is pouched to enhanced function device  200 , boost  123  has a direct connection to battery  245 . 
     In an embodiment of the present innovation boost  123  is not used and battery  245  is directly connected to battery charger  124  via pouch connector  160  while wireless communicator  100  is pouched to enhanced function device  200 . 
     The system of  FIG. 29  applies advantageously to simple enhanced function devices  200 , which have limited power consumption, lower than a threshold current, typically 500 mA. In such case, battery  145  supplies current to the electronic components of device  200  through pouch connector  160 . 
     It will be appreciated by those skilled in the art that the bi-directional battery charging diagram in  FIG. 29  applies to a general setting whereby a mobile device can be docked to an accessory device. The present invention may be used advantageously for bi-directional battery charging for general electronic devices that include controllers, rechargeable batteries, boosts and battery chargers as shown in  FIG. 29 . 
     Reference is now made to  FIG. 30 , which is a summary of bi-directional battery charging logic for the hardware of  FIG. 29 , in accordance with an embodiment of the present invention. In the notation of  FIG. 30  wireless communicator  100  is referred to as a standalone (SA) device, and enhanced function device  200  is referred to as a jacket (JKT), into which wireless communicator  100  can be pouched. 
       FIG. 30  is divided into six columns. The first column refers to a state of the SA battery, and the second column refers to a state of the jacket battery. Referring to  FIG. 30 , the following notation is used in these two columns.
         CC is the charging current for the SA battery. CC should conform to the maximal charging current authorization set by the JKT, and is typically between 200 mA-500 mA. For example, if the SA battery has a charge of 500 mAh, charging with a current greater than 500 mA may be harmful to the battery.   JKT is the voltage of the JKT battery.   SA is the voltage of the SA battery.   STBC is the average standby current of the SA device. STBC is typically between 5 mA-50 mA.   Vc is the voltage drop across the SA boost, the SA battery charger and the SA battery, when being charged with charge CC. Vc is typically approximately 0.3V and corresponds to 50%-100% of the SA battery capacity.   Vh is the maximal voltage to which the SA battery is charged when being charged from the JKT battery. Vh is typically between 3.7V-4V corresponding to approximately 50% capacity of the SA battery.   Vl is the minimal voltage for the SA battery, below which charging from the JKT is forced. Vl is typically between 3.4V-3.5V corresponding to approximately 10% capacity of the SA battery.   Vm is the minimal voltage for the JKT battery, below which charging from the SA device is forced. Vm is typically between 3.4V-3.5V corresponding to approximately 10% capacity of the JKT battery.       

     The third column in  FIG. 30  refers to the mode in which the SA device is operating. There are three operational modes for the SA device, as follows:
         I. High Current Consumption. This mode occurs when the SA device is active and transmitting between the SA device and a base transceiver station (BTS). In this mode the SA has a typical current consumption greater than 100 mA, with peak currents possibly greater than 1 A, depending on power requirement factors, such as the distance of the SA device from the BTS. Using the JKT battery to supply the SA device is undesirable in this mode, due to the high peak currents. Transfer of such high current over pouch connectors poses difficult requirements on the quality and current drive of the JKT battery, boost current and charger current, resulting in increased cost and size of the hardware. Charging in this mode is limited to fixed current, since fixed voltage charging draws peak currents from the JKT, which is undesirable.   II. Standby Current Consumption. This mode occurs when the SA device is not communicating with the BTS. In this mode the SA device has a typical current consumption less than 100 mA, and no peak currents above 100 mA. Such current levels are suitable for supply from the JKT battery, and do not impose limitations on charging.   III. Shutdown. In this mode the SA device is shutdown and has negligible current consumption.       

     The fourth column in  FIG. 30  refers to the mode of charging the batteries. There are five charging modes, as follows:
         I. No Charge. The SA battery supplies all SA current. Efficiency is high, since no extra conversion is applied. The SA battery is being depleted during this mode.   II. Supply from JKT Battery. In this mode, the JKT battery supplies current. Efficiency is lower than in the No Charge mode, due to voltage drop on the SA boost and SA charger, but in general this mode is efficient and preserves power of the SA battery for standalone operation of the SA device.   III. Supply from SA and JKT Battery. In this mode, when there are peaks, the current is drawn from both the SA and the JKT battery. When there are not peaks, the current is drawn from the JKT battery alone. Current peaks are prevalent in many wireless communication systems, including inter alia Global System for Mobile Communication (GSM), General Packet Radio System (GPRS), Code Division Multiple-Access (CDMA), and Integrated Digital Enhanced Network (IDEN). For the GSM system, peaks occur due to time division multiplexing and are caused by time slots usage.   IV. Charge from JKT Battery. In this mode the JKT battery charges the SA battery. This mode is inefficient, in some circumstances possibly less than 50% efficiency. If the SA boost is enabled, the efficiency is even lower, by approximately 10%. When the JKT battery is empty, charging from the JKT battery is disabled.   V. Charge from SA Battery. In this mode the SA battery charges the JKT battery. This mode is inefficient, in some circumstances possibly less than 50% efficiency. If the JKT boost is enabled, the efficiency is even lower, by approximately 10%.       

     The fifth column in  FIG. 30  refers to enablement of disablement of the SA boost. The sixth column in  FIG. 0  refers to the SA charger. 
     The logic in  FIG. 30  is implemented as programming logic for SA and JKT battery chargers and SA boost, to optimize their operation. The logic in  FIG. 30  prescribes columns 4-6 (charging mode, SA boost enablement and SA charger) in terms of columns 1-3 (SA battery voltage, JKT battery voltage and SA operational mode). For example, referring to the first two rows in  FIG. 30 , if JKT&gt;SA&gt;Vh and if the SA device is in Standby Current Consumption mode, then the charging mode is set for the JKT battery to supply current to the SA device, the SA boost is disabled, and the SA charger is set to fixed voltage level. If instead the SA device is in High. Current Consumption mode, then the charging mode is set for both the SA and JKT battery to supply current to the SA device, and the SA charger is set to fixed current level. The logic in  FIG. 30  optimizes usage of the SA and JKT batteries, in order to provide extended operation time for SA device in combination with the JKT, and in standalone mode; and in order to facilitate charging the SA battery from JKT. 
     Reference is now made to  FIG. 31 , which is a simplified block diagram of bi-directional battery charging for a complex enhanced function device  200 , in accordance with an embodiment of the present invention. Shown in  FIG. 31  are controller  105 , battery charger  124  and battery  145 . Battery charger  124  has a dual input. A first input is connected to USB connector  155  for a USB charger  156 , and a second input is connected to the output of voltage boost  123 . 
     Also shown in  FIG. 31  are host controller  205 , battery charger  224 , and battery  245 . Battery charger  224  has a dual input. A first input is connected to USB connector  255  for a USB charger  256 , and a second input is connected to the output of a voltage boost  223 . Battery charger  224  is a hardware-based charging controller that controls charging, including constant current charging and constant voltage charging, based on its input voltage levels and its output HST battery status. 
     Pouch connectors  160  and  260  provide signals paths between components of wireless communicator  100  and components of enhanced function device  200 . Via pouch connectors  160  and  260 , the input of USB charger  256 , denoted by Vbus in  FIG. 31 , is routed to USB charger  156 . 
     modem  120  is able to track the voltage on battery  245 , either by directly measuring a battery pin on pouch connector  160 , or by receiving notifications from battery charger  224  via pouch connectors  160  and  260 . 
     Voltage boosts  123  and  223  receive standard battery voltage as input and generate as output a minimal charging voltage of battery charger  124  and battery charger  224 , respectively. Typical inputs to boosts  123  and  223  are in the range 2.7V-4.2V, and typical outputs are 4.7V. 
     When enabled, boosts  123  and  223  up-convert their input voltages. When disabled, boost  123  simply passes its input voltage through to its output, minus any internal voltage drops. When disabled, boost  223  blocks its input voltage from going out as output. 
     In an alternative embodiment of the present invention, controller  205  enables and disables battery charger  224 , and boost  223  operates similarly to boost  123 ; namely, when disabled, boost  223  passes its input voltage through to its output, minus any internal voltage drops. 
     Boost  123  is enabled by modem  120  via an enable signal. The input of boost  123  is connected to a pin of pouch connecter  160 , such that when wireless communicator  100  is pouched to enhanced function device  200 , boost  123  has a direct connection to battery  245 . Similarly, boost  223  is enabled by host controller  205  via an enable signal. The input of boost  223  is connected to a pin of pouch connector  260 , such that when pouched to wireless communicator  100 , boost  223  has a direct connection to battery  245 . 
     In yet another alternate embodiment of the present invention, controller  205  enables and disables battery charger  224 , and boost  223  is eliminated. Instead of enabling and disabling a voltage boost, controller  205  enables battery charger  224  when charging is desired, and disables battery charger  224  when charging is not desired. 
     The system of  FIG. 31  applies advantageously to complex enhanced function devices  200 , which have current consuming components above a threshold current, typically 500 mA. For such devices, it is impractical to supply their current from battery  145 . Such current would require too much draw from battery  145 , and would be too high for transfer over pouch connectors  160  and  260 . Instead, battery  245  supplies current for the components of enhanced function device  200 . 
     As mentioned above with reference to  FIG. 29 , it will be appreciated by those skilled in the art that the bi-directional battery charging diagram in  FIG. 31  applies to a general setting whereby a mobile device can be docked to an accessory device. The present invention may be used advantageously for bi-directional battery charging for general electronic devices that include controllers, rechargeable batteries, boosts and battery chargers as shown in  FIG. 31 . 
     Reference is now made to  FIG. 32 , which is a summary of bi-directional battery charging logic for the hardware of  FIG. 31 , in accordance with an embodiment of the present invention. As with  FIG. 30 , in the notation of  FIG. 32  wireless communicator  100  is referred to as a standalone (SA) device, and enhanced function device  200  is referred to as a host (HST) device, into which the SA device can be pouched. The notation indicated above for  FIG. 30  applies to  FIG. 32  as well, with HST being used for the docking device instead of JKT. 
     The logic in  FIG. 32  is implemented as programming logic for SA and HST battery chargers to optimize their operation.  FIG. 32  uses the same six columns as  FIG. 30 , with an additional column for indicating enablement/disablement of the HST charger and boost. The logic in  FIG. 32  prescribes the settings in columns 4-7 (charging mode, SA boost enablement, SA charger, HST charger and boost) based on the states in columns 1-3 (SA battery voltage, HST battery voltage and SA operational mode). For example, referring to the first two rows in  FIG. 32 , if HST&gt;SA&gt;Vh and if the SA device is in Standby Current Consumption mode, then the charging mode is set for the HST battery to supply current to the SA device, the SA boost is disabled, the SA charger is set to fixed voltage level, and the HST charger and boost are disabled. If instead the SA device is in High Current Consumption mode, then the charging mode is set for both the SA and HST battery to supply current to the SA device, and the SA charger is set to fixed current level. The logic in  FIG. 32  optimizes usage of the SA and HST batteries, in order to provide extended operation time for SA device in combination with the HST, and in standalone mode; and in order to facilitate charging the SA battery from the HST. 
     It will be appreciated by those skilled in the art that the distinction of JKT vs HST in the systems of  FIGS. 29 and 31  and in the logic of  FIGS. 30 and 32  is merely for the purpose of clarity of exposition. The system and logic of  FIGS. 29 and 30  also, apply to simple host devices  200 , in addition to jackets  200 ; and the system and logic of  FIGS. 31 and 32  also apply to complex jackets  200 , in addition to host devices  200 . In general, the system and logic of  FIGS. 29 and 30  apply to devices (jackets or hosts) with limited power consumption; e.g., less than 500 mA; and the system and logic of  FIGS. 31 and 32  apply to devices (jackets or hosts) with higher current consumption. 
     7. Audio and USB Multiplexing 
     Embodiments of the present invention relate to a switching device that routes analog audio signals and digital USB signals for wireless communicator  100  and enhanced function device  200 . The switching device of the present invention includes circuitry that detects multiple audio/USB configurations. Regarding audio configurations, the switching device supports left and right audio signals for a headset, for stereo speakers and for an earpiece. Regarding USB, the switching device supports connection of a PC or a USB charger to wireless communicator  100  operating as a standalone device, and to wireless communicator  100  pouched with enhanced function device  200 . 
     In accordance with an embodiment of the present invention, when wireless communicator  100  is pouched with enhanced function device  200 , enhanced function device  200  provides data regarding its audio configuration to wireless communicator  100 , the information including inter alia the presence of mono or stereo speakers, and their gains, and the presence of earpiece and microphone, and their gains. Wireless communicator  100  provides signals to enhanced function device  200  via pouch connector  160 , the signals including inter alia headset L/R, D+/−, audio L/R and microphone (elements L, R, D+/L, D−/R and mic of  FIG. 33A ). 
     Considering wireless communicator  100  both as a standalone device, and as a device pouched to enhanced function device  200 , twelve audio/USB configurations are identified, as summarized in TABLE V. 
     
       
         
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE V 
               
             
             
               
                   
               
               
                 Audio/USB Configurations of Wireless Communicator 
               
               
                 and Enhanced Function Device 
               
             
          
           
               
                   
                 State 
                 Audio 
                 USB 
               
               
                   
                   
               
             
          
           
               
                 Standalone 
                 S1 
                 no audio; 
                 no USB connection 
               
               
                 Wireless 
                 S2 
                 audio via wireless 
                 no USB connection 
               
               
                 Communicator 
                   
                 communicator&#39;s 
               
               
                   
                   
                 speakers/earpiece 
               
               
                   
                 S3 
                 audio via headset attached to 
                 no USB connection 
               
               
                   
                   
                 wireless communicator 
               
               
                   
                 S4 
                 no audio 
                 charging via wireless 
               
               
                   
                   
                   
                 communicator USB charger/PC 
               
               
                   
                 S5 
                 audio via wireless 
                 charging via wireless 
               
               
                   
                   
                 communicator speaker 
                 communicator USB charger/PC 
               
               
                 Pouched 
                 J1 
                 no audio 
                 no USB connection 
               
               
                 Wireless 
                 J2 
                 audio via enhanced function 
                 no USB connection 
               
               
                 Communicator 
                   
                 device speaker 
               
               
                   
                 J3 
                 audio via enhanced function 
                 no USB connection 
               
               
                   
                   
                 device earpiece 
               
               
                   
                 J4 
                 audio via headset attached to 
                 no USB connection 
               
               
                   
                   
                 enhanced function device 
               
               
                   
                 J5 
                 no audio 
                 charging wireless communicator 
               
               
                   
                   
                   
                 and enhanced function device 
               
               
                   
                   
                   
                 via USB charger connected to e 
               
               
                   
                   
                   
                 enhanced function device 
               
               
                   
                 J6 
                 audio via jacket&#39;s speaker 
                 charging wireless communicator 
               
               
                   
                   
                   
                 and enhanced function device 
               
               
                   
                   
                   
                 via USB charger connected to 
               
               
                   
                   
                   
                 enhanced function device 
               
               
                   
                 J7 
                 audio via headset attached to 
                 charging wireless communicator 
               
               
                   
                   
                 jacket 
                 and enhanced function device 
               
               
                   
                   
                   
                 via USB charger connected to 
               
               
                   
                   
                   
                 enhanced function device 
               
               
                   
               
             
          
         
       
     
     Reference is now made to  FIGS. 33A and 33B , which are simplified diagrams of a switching circuit  500  that distinguishes between twelve audio/USB configurations of TABLE V, in accordance with an embodiment of the present invention. Specifically, the detection methods and control settings for supporting the twelve audio/USB configurations of TABLE V are summarized in TABLE VI. 
     
       
         
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE VI 
               
             
             
               
                   
               
               
                 Control Settings and Detection Methods for Audio/USB Configurations 
               
             
          
           
               
                   
                 Wireless 
                 Wireless 
                   
                 Enhanced Function 
                 Enhanced Function 
                 Detection (Vbus/ 
               
               
                   
                 Communicator Speaker/ 
                 Communicator 
                 USB/Audio 
                 Device Speaker 
                 Device Earpiece 
                 Headset/Enhanced 
               
               
                 Mode 
                 Earpiece Amplifier 
                 Headset Amplifier 
                 Switch 
                 Amplifier (SPK_EN) 
                 Amplifier (EAR_EN) 
                 Function Device) 
               
               
                   
               
               
                 S1 
                 Disabled 
                 Disabled 
                 Audio 
                 NA 
                 NA 
                 No/No/No 
               
               
                 S2 
                 Enabled 
                 Disabled 
                 Audio 
                 NA 
                 NA 
                 No/No/No 
               
               
                 S3 
                 Disabled 
                 Enabled (G1) 
                 Audio 
                 NA 
                 NA 
                 No/Yes/No 
               
               
                 S4 
                 Disabled 
                 Disabled 
                 USB 
                 NA 
                 NA 
                 Yes/x/No 
               
               
                 S5 
                 Enabled 
                 Disabled 
                 USB 
                 NA 
                 NA 
                 Yes/x/No 
               
               
                 J1 
                 Disabled 
                 Disabled 
                 Audio 
                 Disabled 
                 Disabled 
                 No/No/Yes 
               
               
                 J2 
                 Disabled 
                 Enabled (G2) 
                 Audio 
                 Enabled 
                 Disabled 
                 No/No/Yes 
               
               
                 J3 
                 Disabled 
                 Enabled (G3) 
                 Audio 
                 Disabled 
                 Enabled 
                 No/No/Yes 
               
               
                 J4 
                 Disabled 
                 Enabled (G1) 
                 Audio 
                 Disabled 
                 Disabled 
                 No/Yes/Yes 
               
               
                 J5 
                 Disabled 
                 Disabled 
                 USB 
                 Disabled 
                 Disabled 
                 Yes/x/Yes 
               
               
                 J6 
                 Disabled 
                 Enabled (G2) 
                 USB 
                 Enabled 
                 Disabled 
                 Yes/x/Yes 
               
               
                 J7 
                 Disabled 
                 Enabled (G3) 
                 USB 
                 Disabled 
                 Enabled 
                 Yes/x/Yes 
               
               
                   
               
             
          
         
       
     
     The values G1, G2 and G3 in TABLE VI denote different gain levels. The headset amplifier is set to different gain levels, depending on the type of speakers it has to drive. Thus a different setting is generally required for headset connection, amplified jacket speakers and amplified jacket earpiece. 
     Circuit  500  includes the following elements shown in  FIG. 33A :
         respective D+ and D− signal lines  505  and  510  connecting to power/audio subsystems  125 / 130  of wireless communicator  100 ;   a first analog/digital switch  515  connected to D+ signal line  505 , for multiplexing an input D+ signal to an output USB data signal or audio left signal, the multiplexed signal feeding into pouch connector  160 ;   a second analog/digital switch  520  connected to D− signal line  510 , for multiplexing an input D− signal to an output USB data signal or audio right signal, the multiplexed signal also feeding into pouch connector  160 ;   a control signal line  525  for controlling the switching between audio and USB outputs at switches  515  and  520 ;   a headset left signal line  530  connected to power/audio subsystems  125 / 130  and to the output audio left signal of analog/digital switch  515 ;   a headset right signal line  535  connected to power/audio subsystems  125 / 130  and to the output audio right signal of second analog/digital switch  520 ;   a first USB signal line  540  connected to USB connector  155  and to the output USB data signal of analog/digital switch  515 ;   a second USB signal line  545  connected to USB connector  155  and to the output USB data signal of analog/digital switch  520 ;   a headset microphone signal line  550  connected to power/audio subsystems  125 / 130  and to pouch connector  160 ;   a third USB signal line  555  connected to USB connector  155  and to headset microphone signal line  550 ;   a headset detection line  560  for detecting connection of a headset to a headset port; and   a USB detection line  565  connected to the power/audio subsystems  125 / 130  and to USB connector  155 , for detecting a USB charger or a PC attached to USB connector  155 .       

     Circuit  500  also includes an amplifier (not shown) for amplifying the output audio left signal and the output audio right signal at gain levels appropriate for (i) a headset jack  272  connected to enhanced function device  200 , (ii) left and right speakers  275  and  276  connected to enhanced function device  200 , and (iii) an earpiece  273  connected to enhanced function device  200 . 
     Circuit  500  is designed so that the same detection mechanisms are used to detect direct connection of a charger to wireless communication device  100  or to enhanced function device  200 , and to detect amplified enhanced function device speakers or amplified enhanced function device earpiece. Generally, when wireless communicator  100  is pouched with enhanced function device  200 , access to the wireless communicator&#39;s charger and the wireless communicator&#39;s audio connector is physically blocked, being covered by enhanced function device  200 . 
     In an embodiment of the present invention, when the wireless communicator  100  is in a middle of a phone conversation, and detects insertion into pouch of enhanced function device  200 , it mutes its embedded microphone to avoid disturbance on the other participant of the voice conversation. The microphone is muted until the insertion is complete and both pouch connectors  160  and  260  are fully mated, and the adaption to interoperation is complete. 
     8. SD Bridge Design 
     Embodiments of the present invention relate to a bi-directional data bus that connects a terminal A with a terminal B. The data bus may be an SD or MMC bridge, wherein terminal A is generally connected to enhanced function  200  device and terminal B is connected to wireless communicator  100 . The bridge of the present invention is capable of determining signal direction without the need for external directional signals, and without the need for decoding exact content of messages being transmitted over the bridge. 
     In one embodiment, the present invention employs two data buffers, a first buffer that drives signals in a data bus in a direction from a terminal A to a terminal B, and a second buffer that drives signals in the opposite direction. The buffers may be in an enabled or disabled state. When a buffer is enabled, it drives the signal direction. 
     Special logic is introduced to determine when to enable and disable each of the buffers, based on logical processing of sampled bits at terminals A and B. 
     Reference is now made to  FIG. 34 , which is a simplified diagram of an electrical circuit  600  that determines bus direction in bi-directional SD and MMC signal lines in accordance with an embodiment of the present invention. Circuit  600  connects two terminals, A and B, and carries signals in both directions; i.e., from A to B, and from B to A. 
     Generally, terminal A connects to enhanced function device  200 , Which is an SD host, and terminal B connects to wireless communicator  100 , which is an SD slave. In such case, there are multiple bi-directional data lines D0-D3 and CMD. The data lines D0-D3 are synchronized so that they change their signal directions simultaneously. 
     The voltages at terminals A and B may be the same, or may be different. To accommodate different voltages at the terminals, circuit  600  includes two level-shifter buffers,  610  and  615 , which drive signals from A to B and from B to A, respectively. Level shifting generates voltage drops across the buffers in order to drive the signal direction. Each buffer has two states; namely, enabled and disabled. When buffer  610  is enabled, signal data is transmitted from A to B, and when buffer  615  is enabled, signal data is transmitted from B to A. 
     Circuit  600  also includes four data flip flop (DFF) modules; namely, module  620  designated DFF_A, module  625  designated DFF_B, module  630  designated DFF_EnAB, and module  635  designated DFF_EnBA. Each DFF module has an input value, an output value and a clock value. The output of a DFF module delays the input by one clock count; i.e., a DFF module captures the input signal at the moment of a rising clock edge, when the clock goes high, and subsequent input changes to not influence the output until the next rising clock edge. 
     Modules  630  and  635  are used to enable buffers  610  and  615 , respectively. Specifically, when DFF_EnAB.out=0, buffer  610  is enabled, and when DFF_EnAB.out=1, buffer  610  is disabled. Similarly, when DFF_EnBA.out=0, buffer  615  is enabled, and when DFF_EnBA.out=1, buffer  115  is disabled. 
     Circuit  600  also includes respective by-pass lines  640  and  645 , so that previous signal values A and B, denoted A_Delayed and B_Delayed, respectively, are accessible, together with current signal values A and B. 
     Circuit  600  includes four logical processing units,  650 ,  655 ,  660  and  665 . Processing unit  650  has inputs A and A_Delayed; processing unit  655  has inputs B and B_Delayed; processing unit  660  has input DFF_EnBA.out in addition to the data coming from processing unit  650  into processing unit  660 ; and processing unit  665  has input DFF_EnAB.out in addition to the data coming from processing unit  655  into processing unit  665 . Operation of processing units  650 ,  655 ,  660  and  665  is described in the discussion of  FIG. 35  hereinbelow. 
     Circuit  600  includes two pull-up resistors,  670  and  675 , pull the circuit bus up to logical 1 when both sides of the SD or MMC link are not driving signals. 
     Reference is now made to  FIG. 35 , which is a simplified flowchart of a method for determining bus direction in bi-directional SD and MMC signal lines in accordance with an embodiment of the present invention. Specifically,  FIG. 35  summarizes a portion of the logic for enabling and disabling buffers  610  and  615  of  FIG. 30 . 
     The rationale for the logic illustrated in  FIG. 35  is based on three characteristics of SD and MMC buses; namely:
         1. The SD and MMC bus D0-D3 and CMD lines have pull-up resistors  670  and  675  connected thereto, which pull the bus up to logical 1 when both sides of the SD or MMC link are not driving signals.   2. Each SD and MMC transaction on the D0-D3 and CMD lines begins with a start bit of logical 0 and ends with a stop bit of logical 1.   3. Since the SD and MMC buses include direction transition, the side driving a signal stops driving a bus 2 clock cycles before the opposite side starts driving the bus.       

     The logic of  FIG. 35  begins at step  1705  where both buffers are set to their disabled states. At step  1710  the A and B signal values are initialized to logical 0. Steps  1715  and  1720  are iterative steps that save previous A and B signal values and sample new values. 
     As seen at steps  1725 - 1750 , when one side of circuit  600 , A or B, is sampled to have a logical 0 input, circuit  600  enables the buffer in the direction from that side to the opposite side, and locks the buffer in the enabled state. 
     As seen at steps  1755 - 1775 , circuit  600  disables the enabled buffer when two consecutive logical 1 bits are detected. The event of detecting two consecutive logical 1 bits may represent an end of transaction, or may be part of a transaction. In the former case, both buffers are disabled, and circuit  600  is ready to detect a next transaction, and switch direction as required. In the latter case, the SD or MMC bus remains in its correct logical level due to the pull-up resistors. Since the previous bit was a logical 1, no delay in bus signal stabilization is incurred, due to device and bus capacitance. 
     In order to avoid potential problems with transient conditions and synchronization to the SD_CLK signal, an embodiment of the present invention includes a sampling mechanism that delays transfer of bits from one direction to the other direction by a single clock, as indicated at steps  1720 ,  1735 ,  1750 ,  1770  and  1775  of  FIG. 35 . Such delays are implemented by DFF modules  620 ,  625 ,  630  and  635  of  FIG. 34 , and do not affect proper operation of the SD or MMC bus, since transaction starts are determined by start bits, and not based on exact timing. Internally in a transaction, the delay is fixed and thus no change to transaction content occurs. 
     Reference is now made to the Verilog pseudo-code presented herein, which summarizes one cycle of the logic for enabling and disabling buffers  610  and  615  of  FIG. 34 . Logical processing units  650  and  660  are used to evaluate the Boolean expression !(A &amp; A_Delayed) &amp;!DFF_EnBA.out, and logical processing units  655  and  665  are used to evaluate the Boolean expression !(B &amp; B_Delayed) &amp;!DFF_EnAB.out. 
     
       
         
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 DFF_A.in = A 
               
               
                   
                 DFF_A.clk = SD_CLK 
               
               
                   
                 A_Delayed = DFF_A.out 
               
               
                   
                 DFF_B.in = B 
               
               
                   
                 DFF_B.clk = SD_CLK 
               
               
                   
                 B_Delayed = DFF_B.out 
               
               
                   
                 BufferAtoB.in = A_Delayed 
               
               
                   
                 B = BufferAtoB.out 
               
               
                   
                 BufferBtoA.in = B_Delayed 
               
               
                   
                 A = BufferBtoA.out 
               
               
                   
                 DFF_EnAB.in = !(A &amp; A_Delayed) &amp;!DFF_EnBA.out 
               
               
                   
                 DFF_EnAB.clk = SD_CLK 
               
               
                   
                 BufferAtoB.enable = DFF_EnAB.out 
               
               
                   
                 DFF_EnBA.in = !(B &amp; B_Delayed) &amp;!DFF_EnAB.out 
               
               
                   
                 DFF_EnBA.clk = SD_CLK 
               
               
                   
                 BufferBtoA.enable = DFF_EnBA.out 
               
               
                   
                   
               
             
          
         
       
     
     The logic of  FIG. 35  applies to all bi-directional signals in an SD or MMC bus. However, since the D0-D3 data lines change direction simultaneously, it is only necessary to apply the logic of  FIG. 35  to one of these data lines. The buffer enable/disable signals derived for the one data line suffices to control the buffers for the other three data lines. 
     Reference is now made to  FIG. 36 , which is a sample simulation of the Verilog code for A and B signals 110010101110111 and 0010111, respectively, in accordance with an embodiment of the present invention. Each column in  FIG. 36  represents one clock cycle. As may be seen in  FIG. 36 , the signal direction goes from A to B, and Out A is a one clock delay of A, for bits 0010101 and for bits 01. During the time Out A is used, the buffer from A to B is locked (represented by logical 1), and the buffer from B to A is unlocked (represented by logical 0). Signal direction goes from B to A, and Out B is a one clock delay of B, for bits 00101. During the time Out B is used, the buffer from B to A is locked, and the buffer from A to B is unlocked. 
     It will be appreciated by those skilled in the art that although detection of two logical 1 bits triggers circuit  600  to disable the enabled buffer, as indicated in  FIGS. 35 and 36 , detection of three or more logical 1 bits may be used instead to trigger the disabling. 
     It will further be appreciated by those skilled in the art that circuit  600  may be used as a component of a more complex circuit that selectively connects terminal A with two terminals, B and C, or more than two terminals. To this end, reference is now made to  FIG. 37 , which is a simplified diagram of an electrical circuit  690  that determines bus direction in multiplexed directional SD and MMC signal lines in accordance with an embodiment of the present invention. Generally, terminal A is connected to a host device, and terminals B and C are connected to slave devices. 
     As shown in  FIG. 37 , circuit  690  includes two sub-circuits, each similar in operation to circuit  600 . The elements of one of the sub-circuits are labeled with numerals  610   b - 675   b , and the corresponding elements of the other sub-circuit are labeled with numerals  610   c - 675   c . Each of the sub-circuits is bi-directional, with one direction enabled and the other direction disabled, at any moment. 
     Circuit  690  includes a B/C_SELECT signal line  680 , for selecting terminal B or terminal C. B/C_SELECT line  680  originates from a controller for the host device connected to terminal A. 
     In distinction from logical processing unit  660  of circuit  600 , logical processing units  660   b  and  660   c  have four input lines. For each logical processing unit, two of its input lines carry signals from the sub-circuit in which the processing unit is located, one signal for examining two previous bits in the enabled direction and the other signal for examining a bit in the disabled direction. One of its input lines carries a signal from the other sub-circuit, for examining a bit in the disabled direction; and one of its input lines carries a signal from B/C_SELECT line  680 . Terminals A, B and C may have the same voltage levels, or different voltage levels. 
     9. Automated Consumer Electronic Appliance Reporting 
     Embodiments of the present invention enable automated generation and submission of reports about consumer electronic appliances. The reports may include technical information about an appliance, personal information about the owner of the appliance, and information describing the owner&#39;s usage of the appliance. According to an embodiment of the present invention, generation and submission of reports is enabled by pouching wireless communicator  100  to consumer electronic appliances. 
     The consumer electronic appliances supported by the present invention are of many types, including inter alia cameras, media players, computers, home entertainment systems, home appliances, kitchen appliances, and electric tools. 
     The consumer electronic appliance generally includes storage that stores technical and usage information about the appliance, and wireless communicator  100  stores information about the owner of the appliance in its storage  115 . When pouched with an appliance, wireless communicator  100  automatically generates and sends reports about the appliance and about the owner of the appliance and about the owner&#39;s usage behavior, to one or more appropriate recipients, including inter alia sellers and manufacturers of the appliance, and technical support centers. 
     Report generation and submission for an appliance may be automatically initiated when one or more pre-designated events involving the appliance occur, may be scheduled periodically, and may be manually initiated either by the owner of the appliance or by a remote recipient of the report. 
     Reports may be sent to recipients in the form of SMS messages, MMS messages, e-mail messages, voice messages, or other such GPRS or IP network messages. In addition, wireless communicator  100  may open voice channels, thereby enabling owners of appliances to speak directly with recipients. 
     The present invention applies to a wide variety of different types of reports, including inter alia registration of appliances, maintenance and diagnostic reports, and marketing-based consumer reports. 
     The present invention also applies to access control security, whereby an appliance only operates if an authorized wireless communicator  100  is pouched therewith. Moreover, if the appliance is reported as being missing or stolen, then it does not operate at all, even if an authorized wireless communicator  100  is pouched therewith. 
     Further aspects of the present invention apply to jacket covers for wireless communicator  100 . Using the present invention, reports may be automatically generated and submitted about jackets and their usages. 
     Wireless communicator  100  operates within a variety of wireless communication networks, including inter alia GSM, CDMA and WiFi. These exemplary networks are respectively illustrated in  FIGS. 38-40  hereinbelow. 
     Reference is now made to  FIG. 38 , which is a simplified illustration of an exemplary GSM communication network  700 , within which wireless communicator  100  transmits information about a consumer electronic appliance to remote sites, in accordance with an embodiment of the present invention. Being an embodiment of an enhanced function device, the appliance is denoted as enhanced function device  200  in  FIGS. 38-40 . 
     Communication network  700  is a General Packet Radio Service (GPRS) network. GPRS is a packet-switched service for the Global System for Mobile Communications (GSM), similar to the Internet. GPRS provides packet radio access for mobile GSM users. GPRS also supports Wireless Application Protocol (WAP) services. 
     Appliance  200  be any of a wide variety of devices. Appliance  200  may be an entertainment device, including inter alia a home entertainment center, a play station, a multimedia player, a television, an audio system and a DVD player. Appliance  200  may be a communication device, including inter alia a telephone, a fax machine and a cell phone. Appliance  200  may be a piece of office equipment including inter alia an office computer, and printer and a scanner. Appliance  200  may be a home appliance including inter alia a refrigerator, a microwave oven, a stove, a washing machine, a drying machine, an air conditioner. Appliance  200  may be a personal appliance including inter alia a personal computer, a personal data assistant (PDA), an automobile, a treadmill and a camera. 
     Wireless communicator  100  communicates with a base transceiver station (BTS)  715  via an over-the-air interface. Base transceiver stations are components of communication network  700  that terminate the over-the-air interface, over which subscriber traffic is communicated to and from wireless communicator  100 . Communication network  700  also includes a base station controller (BSC)  720 . Base station controllers are switching modules that provide handoff functions and power level control in base transceiver stations. 
     BSC  720  is controlled by a mobile switching center (MSC)  725 . MSC  725  performs functions of a landline network switching node, including search, signal path switching, and processing of supplementary services. When a request is made for connecting to a subscriber in a landline network, the request is forwarded by MSC  725  to the landline network over a switching path. 
     BSC  720  controls the interface between MSC  725  and BTS  715 , and, as such, controls BTS  715  in call set-up, signaling, and use of radio channels. BSC  720  also controls the interface between a serving GPRS support node (SGSN)  730  and BTS  715 . 
     SGSN  730  services wireless communicator  100  by sending or receiving packets via a base station subsystem (BSS), and more specifically via BSC  720 , in the context of GSM systems. SGSN  730  is responsible for delivery of data packets to and from wireless communicator  100 , within a service area. SGSN  730  also performs packet routing and transfer, mobility management, local link management, authentication and charging functions. 
     In order to accommodate a multitude of services, a provider of communication network  700  stores various types of data. The provider must know which subscribers are using communication network  700 , and which services the subscribers use. Subscriber profiles, such as the International Mobile Subscriber Identify Number (IMSI), of GPRS subscribers registered with SGSN  730 , are stored in a home location registry (HLR)  735 . The owner of wireless communicator  100  is such a GPRS subscriber. 
     To determine whether a subscriber is entitled to use communication network  700 , the network provider maintains an authentication center (AUC)  735 . Generally, AUC  735  includes algorithms and subscriber-related encryption keys, which are used for authentication. AUC  735  determines, inter alia, whether a subscriber has a valid service contract. 
     The provider of communication network  700  may optionally maintain an equipment identity registry (EIR)  735 , which includes details of mobile transceivers permitted on the network. Generally, EIR  735  stores a “white list”, a “grey list” and a “black list”. The white list includes mobile phones that function reliably, the grey list includes mobile phones that may be defective, and the black list includes mobile phones which are either faulty or have been reported missing or stolen. 
     In order to establish a connection to a subscriber&#39;s mobile phone, the network provider must determine where the subscriber is located and whether his mobile phone is turned on. Such information is stored in a visitor location registry (VLR)  740 . 
     While GSM forms the underlying technology, SGSN  730  is a network element introduced through GPRS technology. HLR/AUC/EIR  735  is also in communication with a gateway MSC  745 , which acts as a gateway to a public-switched telephone network (PSTN)  750 . 
     Another network element introduced in the GPRS context is the gateway GPRS support node (GGSN)  755 , which acts as a gateway to Internet  760  and to an external server  765 , respectively. External server  765  may be used by a manufacturer of appliance  200 , a seller of appliance  200 , a service provider for appliance  200 , or a combination of the above. 
     Reference is now made to  FIG. 39 , which is a simplified illustration of an exemplary Code Division Multiple Access (CDMA) communication network  800 , within which wireless communicator  100  transmits information about appliance  200  to remote sites, in accordance with an embodiment of the present invention. The specific communication network shown in  FIG. 39  conforms to the CDMA2000 1x standard. Communication network  800  includes several components of  FIG. 38 ; namely, wireless communicator  100 , appliance  200 , base station transceiver  715 , base station controller  720 , mobile switching center  1125 , HLR/AUC/EIR  735 , VLR  740 , gateway MSC  745 , PSTN  750 , Internet  760  and external server  765 . 
     In communication network  800 , BSC  720  is in communication with a packet control function (PCF)  805 . In turn, PCF  805  is in communication with a packet data serving node (PDSN)  810 , which is part of a packet core network (PCN)  815 . A packet core network generally includes a succession of interconnected routers, or such other communication nodes, that carry Internet protocol (IP) data traffic. 
     PDSN  810  provides both mobility management functions, similar to SGSN  730 , and packet routing functions, similar to GGSN  755 . PDSN  810  serves as a connection point between a radio access network and an IP network, and manages point-to-point sessions between a mobile phone and an IP address. 
     PCF  805  provides a relay from PDSN  810  to a mobile phone. PCF  805  tracks registration expiration, and ensure that sessions are renewed as necessary. PCF  805  also controls available radio resources, and buffers data received from PDSN  810  when radio resources are not available. PCF  805  also controls dormancy. 
     PCN  815  also includes a home agent (HA)  820 . Generally, HA  820  manages roaming and handoff of mobile data. HA  820  is used for registration of a mobile IP (MIP), and transfer of mobile packet data in PDSN  810 . Through tunneling, HA  820  transfers MIP data from a home network to PDSN  810 , and from PDSN  810  to the home network through a reverse tunnel. 
     PCN  815  also includes an authentication, authorization and accounting (AAA) server  825 . Generally, AAA server  825  is responsible for access control. AAA server  825  processes user requests for access to computer resources and, for enterprises, provides authentication, authorization and accounting services. Authentication is used to identify subscribers. Authorization is used to manage policies and service profiles that govern which resources and services a subscriber may access, and to manage and distribute security keys. Accounting services track usage of time and data resources, and manage billing. AAA server  825  interacts with network access and gateway servers, and with databases and directories containing user information. 
     In communication network  800 , MSC  725  is in communication with an interworking function (IWF)  830 . An interworking function provides an interface between wireless data networks and data packet networks such as Internet  760  or corporate intranets, and also between wireless data networks and wireline networks such as PSTN  750 . The interworking function converts and sends data to a data packet network or a wireline network, based on the data type. Generally, IWF  830  includes modems or data terminal adapters, or both, to convert data transmitted over a wireless network to a format suitable for recognition and carrying by a public telecommunications network. 
     Reference is now made to  FIG. 40 , which is a simplified illustration of an exemplary IEEE 802.11b WiFi communication network  900 , within which wireless communicator  100  transmits information about appliance  200  to remote sites, in accordance with an embodiment of the present invention. Communication network  900  includes several components of  FIGS. 38 and 39 ; namely, wireless communicator  100 , appliance  200 , Internet  760  and external server  765 . 
     A wireless router  905  communicates with a modem  910 , and modem  910  sends and receives data to and from Internet  760 . 
     It will be appreciated by those skilled in the art that although  FIGS. 38-40  illustrate operation of wireless communicator  100  in GSM network  700 , CDMA network  800  and WiFi network  900 , the present invention applies to other current and future technologies, including inter alia packet-switched and circuit-switched technologies, and 3G technologies. 
     Referring back to  FIG. 6 , storage  115  includes information about the owner of appliance  200 , such as information INF-3 listed below in TABLE V. Information INF-3 may include inter alia subscriber identification module (SIM) information for wireless communicator  100 . 
     Similarly, referring back to  FIGS. 7A and 7B , storage  215  includes technical and usage information about appliance  200 , such as information INF-1 listed below in TABLE VII. 
     In accordance with an embodiment of the present invention, wireless communicator  100  and appliance  200  communicate with one another via a pair of mailboxes within wireless communicator  100 . Specifically, pouching controller  110  includes two mailboxes, an outgoing mailbox that is written to by base band modem  120  and read from by appliance  200 , and an incoming mailbox that is written to by appliance  200  and read from by base band modem  120 . Pouching controller  110  initiates an interrupt to pouching controller  210  when base band modem  120  completes a write operation to the wireless communicator&#39;s outgoing mailbox. Such interrupt may be implemented as an SDIO interrupt on an SD bus, or as a dedicated signal. Similarly, pouching controller  210  initiates an interrupt to base band modem  120  when appliance  200  completes a write operation to the wireless communicator&#39;s incoming mailbox. 
     It will thus be appreciated by those skilled in the art that wireless communicator&#39;s incoming and outpoint mailboxes may be used for direct transfer of data between wireless communicator  100  and appliance  200 . In one embodiment of the present invention, each mailbox includes 512 bytes, of which the first two bytes are header bytes that store a message type, and the remaining bytes store the message itself. 
     Wireless communicator&#39;s incoming and outgoing mailboxes may be mapped to an SDIO register map on the modem side and on the appliance side, respectively. Alternatively, wireless communicator&#39;s incoming and outgoing mailboxes may be mapped to SD memory space. In such case an arbitration algorithm is used to resolve conflicts when both appliance  200  and wireless communicator  100  try to access SD storage at the same time. 
     Reference is now made to  FIG. 41 , which is a simplified flowchart of a method for automated reporting for appliance  200 , using wireless communicator  100 , in accordance with an embodiment of the present invention. At step  3705 , a manufacturer of appliance  200  stores information about the appliance, designated by INF-1, and contact information for a recipient, designated by INF-2, in appliance  200  storage  215 . 
     At step  1810 , a consumer purchases appliance  200 . At step  1815 , the consumer attaches wireless communicator  100  to appliance  200 . When wireless communicator  100  is attached to appliance  200 , wireless communicator  100  collects and monitors real-time information related to operation and usage of appliance  200 . In an embodiment of the present invention, wireless communicator  100  stores details about the user, designated by INF-3, in its local storage  115 . 
     In an embodiment of the present invention, INF-3 may be stored in SIM  190 . 
     At step  1820 , wireless communicator  100 , wishing to receive appliance information INF-1 and recipient contact information INF-2 from appliance  200 , writes an information request to the wireless communicator&#39;s outgoing mailbox. At step  1825  pouching controller  110  raises an interrupt to appliance  200 . At step  1830  host appliance  200  reads the request message, and at step  1835  host appliance  200  writes the requested information INF-1 and INF-2 to the wireless communicator&#39;s incoming mailbox. 
     At step  1840  pouching controller  210 , in turn, raises an interrupt to baseband modem  120 , and at step  1845  wireless communicator  100  reads the requested information INF-1 and INF-2. 
     At step  1850  wireless communicator  100  prepares an appropriate report for recipient  765 , based on INF-1 and INF-3. At step  1855  wireless communicator  100  sends the report to recipient  765  at the recipient&#39;s address as specified in INF-2. 
     The report may be sent to recipient  765  in the form of an SMS message, an MMS message, a voice message, a GPRS message, or such other message transmitted by wireless communicator  100 . Alternatively or in addition, the report may be transmitted as an e-mail message over an IP or alternate network. The report may be transmitted over a GDSM network, as in  FIG. 38 , over a CDMA network as in  FIG. 39 , over a WiFi network as in  FIG. 40 , or via WIMAX communication. 
     Steps  1815 - 1855  of  FIG. 41  are summarized in the following simplified pseudo-code. 
     
       
         
               
             
               
               
             
               
               
               
             
               
             
           
               
                   
               
             
             
               
                 //declarations for variables 
               
               
                 OWNER DETAILS = {NAME, CONTACT_INFO}; 
               
               
                 HOST_DETAILS = {HOST_TYPE, MODEL_NUM, 
               
               
                 SERIAL_NUMBER, MANUFACTURER, RECIPIENT_NUMBER}; 
               
             
          
           
               
                 IF (IS_CC_INSERTED) { 
                 // step 1815 
               
             
          
           
               
                   
                 CC_MAILBOX_WRITE(“INFO REQUEST”}; 
                 // step 1820 
               
               
                   
                 INTERRUPT_HOST( ); 
                 // step 1825 
               
               
                   
                 HOST_MAILBOX_READ_MAILBOX ( ); 
                 // step 1830 
               
               
                   
                 HOST_MAILBOX_WRITE(HOST_DETAILS); 
                 // step 1835 
               
               
                   
                 INTERRUPT_CC( ); 
                 // step 1840 
               
               
                   
                 CC_MAILBOX_READ(HOST_DETAILS); 
                 // step 1845 
               
               
                   
                 MESSAGE = 
                 // step 1850 
               
               
                   
                 PREPARE_MESSAGE(OWNER_DETAILS, 
                   
               
               
                   
                 HOST_DETAILS); 
                   
               
               
                   
                 SEND_TO_RECIPIENT(RECIPIENT_NUMBER, 
                 // step 1855 
               
               
                   
                 MESSAGE); 
               
             
          
           
               
                 } 
               
               
                   
               
             
          
         
       
     
     TABLE VII summarizes exemplary information data that is accessed by wireless communicator  100  in performing the method of  FIG. 41 . 
     
       
         
               
             
               
               
               
             
           
               
                 TABLE VII 
               
             
             
               
                   
               
               
                 Exemplary information accessed by wireless communicator 100 
               
               
                 for automated reporting of appliance 200 or of the communicator&#39;s jacket 200 
               
             
          
           
               
                 INF-1: Appliance information/ 
                 INF-2: Recipient contact 
                   
               
               
                 INF-1: Communicator jacket information 
                 information 
                 INF-3: Owner information 
               
               
                   
               
               
                 Manufacturer 
                 Phone number 
                 ID 
               
               
                 Type of appliance 
                 E-mail 
                 Membership number 
               
               
                 Model Number 
                 IP address 
                 Full name 
               
               
                 Serial Number 
                   
                 Address 
               
               
                 SKU 
                   
                 Phone number 
               
               
                 Date of purchase 
                   
                 Cell phone number 
               
               
                 Point of purchase 
                   
                 E-mail 
               
               
                 Capabilities - screen type 
                   
                 Web site 
               
               
                 Capabilities - screen size 
                   
                 SIM subscriber information 
               
               
                 Capabilities - user interface 
               
               
                 Usage-related information 
               
               
                   
               
             
          
         
       
     
     Generally, appliance information, INF-1, is controlled by the manufacturer or seller of the appliance, and is stored in the appliance itself. Appliance information, INF-1, may be updated by the manufacturer or seller up to the time when the appliance is sold. In another embodiment of the present invention, some or all of appliance information, INF-1, may be manually entered. Such information may be attached to or printed on the appliance, for reference. 
     Generally, owner information, INF-3, is controlled by the owner of appliance  200 , and is stored in wireless communicator  100 . Alternatively, some or all of owner information, INF-3, may be accessible on a network such as the Internet. In such case, wireless communicator  100  accesses the owner information from the network, prior to sending the report to recipient  765  at step  1850 . In another embodiment of the present invention, some or all of owner information, INF-3, may be manually entered. 
     The usage-related information listed in TABLE VII may include a variety of present and past usage information. Such usage-related information includes inter alia,
         wireless communicator insertion time;   wireless communicator extraction time;   battery status of the appliance;   battery status of the wireless communicator;   memory status of the appliance;   memory status of the wireless communicator;   geographical movement of the appliance;   mode of the appliance (e.g., silent, flight mode, meeting mode)   accessories connected to the appliance (e.g., earphones, speaker, charger);   accessories connected to the wireless communicator (e.g., PC);   software installed on the appliance (e.g., drivers, operation system, applications, codecs);   software and firmware versions on the appliance;   file types in memory of the appliance (e.g., audio, video, documents); and   file types in memory of the wireless communicator.       

     For purposes of illustration, the following is an exemplary simplified report that is submitted by wireless communicator  100  to recipient  765  at step  1855 . 
     
       
         
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 Device Details 
               
               
                   
                 Type: Digital Camera 
               
               
                   
                 Manufacturer: Olympus 
               
               
                   
                 Model: C-765 
               
               
                   
                 SKU: 12345-ABCDE 
               
               
                   
                 Additional Information (report specific) 
               
               
                   
                 Owner Details 
               
               
                   
                 Name: Jack Times 
               
               
                   
                 Phone: 123-456-7890 
               
               
                   
                 Cell Phone: 987-654-3210 
               
               
                   
                 E-mail: Jack.Times@mailserver.com 
               
               
                   
                   
               
             
          
         
       
     
     Reporting step  1855  may be performed either while wireless communicator  100  is pouched with appliance  200 , or while wireless communicator  100  is not pouched with appliance  200 , or both. When wireless communicator  100  is pouched with appliance  200 , automated reporting may be event driven. Events that may initiative the reporting include inter alia
         Attachment of the wireless communicator to the appliance   Detachment of the wireless communicator from the appliance   Performing a device-specific function, e.g., begin listening to a song on an audio player   Appliance is turned on   Appliance is turned off   Wireless Communicator is pouched with the appliance for the first time       

     Wireless communicator  100  may generate and save a usage history log in the wireless communicator storage  115  or in the appliance storage  215 . Wireless communicator  100  may generate and save a history log for a plurality of appliances. Information from the history log can be sent periodically to the recipient, such as daily or weekly. 
     Reporting step  1855  may be performed in real-time, or at a later time via a PC or via GPRS. Reporting step  1855  may be initiated by the owner of appliance  200 . For example, the owner may initiate generating a report and submitting the report to a service provider, if appliance  200  is malfunctioning. 
     Reporting step  1855  may be initiated by software or firmware running on appliance  200  or on wireless communicator  100 . Such software or firmware initiated reporting may occur as a one-time event, or as a recurring event. 
     Reporting step  1855  may be initiated remotely over a network. For example, recipient  765  may initiate generating a report and submitting it to the recipient. 
     Alternatively or in addition to step  1855 , wireless communicator  100  may open a voice channel for the user of appliance  200  and the recipient to speak with one another, or to leave voice messages for one another. Thus, when wireless communicator  100  is pouched with appliance  200  for the first time, the owner of appliance  200  and the recipient may be connected via a voice channel. The recipient may thereby introduce the owner to operation of appliance  200 , assist the owner in configuring appliance  200 , and offer the owner of CE appliance  200  a tutorial. In addition, incoming voice messages may be saved in a voice mailbox within wireless communicator  100 . 
     As described hereinabove, wireless communicator  100  may have one or more jackets  200 . In an embodiment of the present invention, distinct jackets  200  of wireless communicator  100  have distinct identification codes. The identification code of a jacket  200  may include some or all of information, INF-1. In this embodiment, the jacket identification code may be reported to the recipient at step  1855 . 
     In accordance with an embodiment of the present invention, reporting step  1855  may advantageously use a user-agent header, which prefaces transmissions from wireless communicator  100 . User-agent headers are text strings that are transmitted by a device, such as wireless communicator  100 , via an HTTP header, to identify the device that is sending data. User-agent headers generally include a wireless device model and manufacturer. User-agent headers may also include additional information such as the device&#39;s operation system version, browser version and Java capabilities. Examples of user-agent headers are: 
     Nokia 6230 
     User-Agent: Nokia6230/2.0 (03.14) Profile/MIDP-2.0 Configuration/CLDC-1.1 
     Sony Ericsson Z1010 
     User-Agent: SonyEricssonZ1010/R1A SEMC-Browser/4.0 
     Modu 
     User-Agent: Modu-A1.0/SKY Browser 1.1/Music 
     In accordance with an embodiment of the present invention, user-agent headers are modified according to capabilities of appliance  200 , so that recipient  765  may identify content and services that appliance  200  supports. User-agent headers are also modified according to properties of the wireless communicator&#39;s jacket, so that recipient  765  may identify the jacket. The user-agent headers are modified in the HTTP header upon pouching of wireless communicator  100  with appliance  200 , or upon pouching of wireless communicator  100  with its jacket. 
     Wireless communicator  100  also uses a user-agent profile (UAProf). Specifically, wireless communicator  100  sends a universal resource, identifier (URI) with a link to its UAProf, within an HTTP header or a Web Service Provider (WSP) header. The UAProf resides on the manufacturer&#39;s web site—either the manufacturer of wireless communicator  100  or the manufacturer of appliance  200  or the manufacturer of jacket  200 . The UAProf is maintained by the manufacturer, and is unique per communicator/appliance combination per communicator/jacket combination and per software version. The URI is updated when a UAProf parameter value is changed. 
     The system and method of the present invention illustrated in  FIGS. 38-41  may be used advantageously in many application areas where automated reporting is useful, including inter alia:
         medical reports;   police reports;   insurance reports;   driver and automobile safety reports;   taxi cab reports;   credit card reports;   ATM card reports;   registration of CE devices;   diagnostics and maintenance;   software/firmware updates;   warranties and guarantees;   access control security;   offer of services;   time-stamping;   advertising;   market segmentation;   understanding user behavior; and   networking.       

     The present invention is advantageous for automated registration, diagnostic testing and malfunction reporting for electrical appliances. In an embodiment of the present invention, when wireless communicator  100  is pouched with a new appliance, wireless communicator  100  automatically collects information about the appliance and its owner, and transmits the collected information to a remote manufacturer or seller for registering the appliance. 
     Wireless communicator  100  also includes program code for diagnostic testing of the appliance. When wireless communicator  100  is pouched with the appliance, the program code runs diagnostic maintenance tests on the appliance. Wireless communicator  100  automatically collects information about the appliance and its owner, and transmits the collected information along with a diagnostic report, to the seller or service provider for the appliance. In turn, if a malfunction is reported, the seller or service provider contacts the owner about repairing the appliance. In this way, the seller or service provider is able to maintain the appliance, and proactively repair appliance malfunctions before they become severe. 
     Reference is now made to  FIG. 42 , which is a simplified illustration of a communications network with wireless communicator  100  that wirelessly transmits registration information about appliance  200  to one or both of a remote manufacturer and a remote seller  300  in accordance with an embodiment of the present invention. When wireless communicator  100  is pouched with appliance  200 , wireless communicator  100  automatically registers appliance  200  by transmitting appropriate information  310  about the appliance, its purchase, and its owner to remote manufacturer or a seller  300 . 
     Referring back to  FIG. 6 , in accordance with an embodiment of the present invention, storage  115  stores information about the owner of appliance  200 , and appliance registration program code for registering appliance  200 . Similarly, referring back to  FIGS. 7A and 7B , storage  215  stores information about appliance  200  and its purchase. Such details may include inter alia a serial number for appliance  200 , a model number, a date of purchase and an identifier for the store where appliance  200  was purchased. 
     Wireless communicator  100  is used to send registration information about appliance  200  and its owner to one or more of manufacturer and seller  300 . 
     When wireless communicator  100  is pouched with appliance  200 , appliance  200  serves as an enhanced function host device. To register appliance  200 , the appliance registration program code programs wireless communicator  100  (i) to collect requisite appliance and purchase information from the appliance storage  215 , and owner information from the wireless communicator storage  115  or SIM  190 ; and (ii) to forward the collected information to the seller or to the manufacturer  300 , as appropriate, using modem  120 . Contact information for seller or manufacturer  300  may be available in the appliance storage  215 . Alternatively, contact information for seller or manufacturer  300  may be entered manually to wireless communicator  100 . Yet alternatively, contact information for seller or manufacturer  300  contact information may be available in wireless communicator storage  115 . Specifically, wireless communicator  100  may store a list of manufacturers and their appliances, and looks up the appropriate contact information based on appliance  200 . 
     In an alternative embodiment of the present invention, owner information does not reside in wireless communicator storage  115  or SIM  190 . Instead, wireless communicator  100  obtains the owner information from an external server. 
     In accordance with one embodiment of the present invention, connection to the seller or manufacturer  300  is initiated by wireless communicator  100 , and transmitted over GPRS (GSM mobile data service). Wireless communicator  100  creates a file or text message that includes the relevant registration data, shown as message  310  in  FIG. 42 . An example of such file or text message is as follows. 
     
       
         
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 Device details 
               
               
                   
                 Type: Audio Receiver 
               
               
                   
                 Brand: Yamaha 
               
               
                   
                 Model: RX-V2700 
               
               
                   
                 S/N: 12345-ABCDE 
               
               
                   
                 Purchase Details 
               
               
                   
                 Date of Purchase: 01/01/2007 
               
               
                   
                 Store: 1280 Lexington Ave., New York, NY 10028 
               
               
                   
                 Owner Details 
               
               
                   
                 Name: John Smith 
               
               
                   
                 Phone: 123-456-7890 
               
               
                   
                 Cell: 098-765-4321 
               
               
                   
                 Email: John.Smith@anonymous.com 
               
               
                   
                   
               
             
          
         
       
     
     In another embodiment of the present invention, wireless communicator  100  transmits the registration information via an SMS or MMS message. In yet another embodiment of the present invention, wireless communicator  100  places a voice call to the seller or manufacturer  300  with the information indicated in the text above, using text-to-speech conversion. 
     An alternate embodiment of the present invention, owner information is not stored in wireless communicator  100 . Instead, owner information is retrieved by the seller and manufacturer  300  after receipt of registration data sent from wireless communicator  100 . Alternatively or additionally, owner information, together with an optional owner log history, is stored within appliance  200  itself. 
     After wireless communicator  100  has registered appliance  200 , a corresponding flag is set in wireless communicator storage  115  or appliance memory  215 . Thereafter, when wireless communicator  100  is pouched with appliance  200  it knows not to register appliance  200  a second time. 
     Reference is now made to  FIG. 43 , which is a simplified illustration of a communications network with wireless communicator  100  that wirelessly transmits diagnostic information about appliance  200  to one or more of a remote seller, a remote manufacturer and a remote service provider  300  in accordance with an embodiment of the present invention. When wireless communicator  100  is pouched with appliance  200 , wireless communicator  100  (i) automatically runs diagnostic tests on appliance  200 , and (ii) automatically prepares diagnostic summary reports  320  for appliance  200  and transmits them to remote seller, manufacturer or service provider  300  for the appliance. 
     Referring back to  FIG. 6 , in an embodiment of the present invention the wireless communicator storage  115  stores information about the owner of wireless communicator  100 , and also store application diagnostic program code for reporting diagnostics of appliance  200 , as described hereinbelow. Similarly, referring back to  FIGS. 7A and 7B , the appliance storage  215  stores information about appliance  200  and its purchase. Such details may include inter alia a serial number for appliance  200 , a model number, a software/firmware version, a date of purchase and an identifier for the store where appliance  200  was purchased. 
     Further in accordance with an embodiment of the present invention, electrical appliance  200  includes sensors for use in diagnostics. A sensor is a type of transducer which converts a signal into a reading for the purpose of information transfer. There are direct-indicating sensors which are human-readable, e.g., a mercury thermometer. Other sensors that may be embedded in an electrical appliance are sensors that produce an output voltage or such other electrical output which is interpreted by another device. Most sensors are electrical or electronic, although other types exist. Sensors used in diagnostics of appliance  200  in accordance with the present invention include inter alia thermal sensors, electromagnetic sensors, mechanical sensors, chemical sensors, optical radiation sensors, ionizing radiation sensors and acoustic sensors. 
     Wireless communicator  100  is used to send information about electrical appliance  200  and its owner to one or more of seller, manufacturer service provider  300 . The information sent by wireless communicator  100  includes diagnostic reports for appliance  200 . 
     When wireless communicator  100  is pouched with appliance  200 , appliance  200  serves as an enhanced function host device. For maintenance and repair of appliance  200 , the appliance diagnostic program code programs wireless communicator  100  (i) to run diagnostic tests on appliance  200 ; and (ii) to forward the test results to seller, to manufacturer or service provider  300  for appliance  200 , as appropriate, using modem  120 . As above, wireless communicator  100  creates a file or text message that includes the relevant diagnostic monitoring data, shown as service report  320  in  FIG. 43 . An example of such file or text message is as follows. 
     
       
         
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 Device details 
               
               
                   
                 Type: Audio Receiver 
               
               
                   
                 Brand: Yamaha 
               
               
                   
                 Model: RX-V2700 
               
               
                   
                 S/N: 12345-ABCDE 
               
               
                   
                 Problem Diagnosed 
               
               
                   
                 Description: Over-heating 
               
               
                   
                 Owner Details 
               
               
                   
                 Name: John Smith 
               
               
                   
                 Phone: 123-456-7890 
               
               
                   
                 Cell: 098-765-4321 
               
               
                   
                 Email: John.Smith@anonymous.com 
               
               
                   
                   
               
             
          
         
       
     
     In another embodiment of the present invention, wireless communicator  100  transmits the service report using an SMS or MMS message. In yet another embodiment of the present invention, wireless communicator  100  places a voice call to seller, manufacturer or service provider  300  with the information indicated in the text above, using text-to-speech conversion. 
     In accordance with an embodiment of the present invention, diagnostic tests may be scheduled periodically, or initiated manually by the owner, or initiated remotely via wireless communicator  100 . 
     Reference is now made to  FIG. 44 , which is a simplified flowchart of a method for registering electrical appliances using wireless communicator  100  in accordance with an embodiment of the present invention. At step  1910  a buyer purchases an electronic appliance, which serves as a host device, such as appliance  200  of  FIG. 42 . At step  1920  the buyer pouches wireless communicator  100  with the appliance  200 . At step  1930  the wireless communicator pouching controller  110  recognizes its being pouched to appliance  200 . 
     At step  1940  pouching controller  110 , under program instruction from code stored on wireless communicator  100 , such as the appliance registration program code, collects appliance information and purchase information from the appliance storage  215 . Such appliance and purchase information includes inter alia a serial number, a model number, a date of purchase, and an identifier of a store where the appliance was purchased. At step  1950  pouching controller  110  collects information about the owner from wireless communicator storage  115  or SIM  190 . At step  1960  pouching controller  110  collects contact information for the seller or manufacturer of appliance  200 , with whom the appliance is to be registered. Such contact information may be stored in appliance  200 , or may be manually entered. Finally, at step  1970  wireless communicator  100  opens a connection to the seller or manufacturer, and transmits the registration information. Wireless communicator  100  may transmit the registration information as data transmitted over GPRS. Alternatively, wireless communicator  100  may transmit the information as a voice transmission by making a phone call to the seller or manufacturer. 
     Reference is now made to  FIG. 45 , which is a simplified flowchart of a method for reporting diagnostics for electrical appliances using wireless communicator  100  in accordance with an embodiment of the present invention. At step  2010  a consumer inserts wireless communicator  100  into appliance  200 , which serves as an enhanced function host device for wireless communicator  100 . At step  2020  wireless communicator  100  monitors appliance  200  by running diagnostic testing program code that is stored in the wireless communicator storage. At step  2030  a determination is made whether a problem has been detected. If not, the method returns to step  2020  to continue monitoring appliance  200  while wireless communicator  100  is pouched therewith. Such monitoring may be continuous monitoring or scheduled periodic monitoring. 
     Referring back to step  2030 , if a problem is detected, then at step  2040  the wireless communicator pouching controller  110  collects appliance information that is stored in appliance storage  215 . Such information includes inter alia an appliance serial number and a model number. Pouching controller  110  also identifies a malfunction type corresponding to the detected problem. At step  2050  pouching controller  110  collects owner data that is stored in wireless communicator storage  115 . At step  2060  pouching controller  110  collects contact information for the seller, manufacturer or service provider of appliance  200 . At step  2070  wireless communicator  100  contacts the seller, manufacturer or service provider and transmits an alert notification regarding the malfunction. Finally, at step  2080  the seller, manufacturer or service provider contacts the owner of appliance  200  regarding the malfunction. The present invention is advantageous for updating software and firmware. The generated report may include identifiers of versions of software and firmware for an enhanced function device, in response to which appropriate updated versions are remotely accessed. In accordance with an embodiment of the present invention, wireless communicator  100  maintains a history log of the various enhanced function devices it was pouched with. The history log includes the enhanced function devices&#39; current installed software and firmware versions. In an embodiment of the present invention, specific settings that were last defined or modified for the enhanced function devices are kept in a log file. When wireless communicator  100  reports its history log, appropriate software/firmware updates are made accessible for wireless communicator  100  to download. After downloading the updates, when wireless communicator  100  is subsequently pouched with one of the enhanced function devices in its history log, the software/firmware in these enhanced function devices is updated as appropriate. The updated software/firmware may be installed automatically when wireless communicator  100  is pouched with an enhanced function device, or may be prompted manually by a user. 
     According to an embodiment of the present invention, the settings for the enhanced function devices are restored on the enhanced function device from the log file on the wireless communicator when wireless communicator  100  is subsequently pouched with any of the enhanced function devices. 
     Reference is now made to  FIG. 46 , which is a simplified flow chart of a method for provisioning software and firmware updates to a plurality of jackets and appliances using the wireless communicator in accordance with an embodiment of the present invention. At step  2110  wireless communicator  100  is pouched in a plurality of jackets and appliances over time. At step  2120  wireless communicator collects information relating to the plurality of jackets and appliances over time, the collected information including versions of installed software/firmware and last defined or modified settings for the jackets and appliances. 
     At step  2130  wireless communicator  100  maintains a history log of the collected information. At step  2140 , wireless communicator  100  is connected to a PC, and the PC reports the history log to one or more remote update servers. At step  2150  the remote update servers transmit new versions of software/firmware to wireless communicator, as appropriate for the plurality of jackets and appliances. At step  2160 , upon subsequent pouching of wireless communicator  100  to any of the plurality of jackets and appliances, the updated versions of software/firmware are installed on the jacket or appliance. 
     10. SD Switch Box in the Wireless Communicator 
     Embodiments of the present invention enable the wireless communicator baseband modem  120  to bypass NOR flash memory when booting up, enable communication between baseband modem  120  and an enhanced function host device  200 , and enable baseband modem  120  to switch in and out of sleep mode without loss of state parameters and code image. 
     In accordance with an embodiment of the present invention, pouching controller  110  is used to couple enhanced function host device  200  with the Wireless communicator&#39;s baseband modem  120  and with the wireless communicator&#39;s storage  115  embodied as NAND flash memory. Pouching controller  110  serves as an SD switch box, which connects two SD devices, namely, the baseband modem  120  and enhanced function host device  200 , and enables switching access to SD storage between the two SD devices. 
     In an embodiment of the present invention, while pouching controller  110  operates as an SD switch, it is used for allowing two SD hosts embedded within the same housing to access the SD storage. Pouching controller  110  thus enables use of a single storage area accessible by multiple controllers in the same housing, such as modem  120  and an optional application processor. Similarly, pouching controller  110  enables use of a single storage area accessible by modem  120  and external controller  205 . 
     Pouching controller  110  includes a communication mechanism through which baseband modem  120  and enhanced function host device  200  communicate with one another. Such communication mechanism includes an outgoing communicator mailbox via which baseband modem  120  sends a message to enhanced function host device  200 , and an incoming communicator mailbox via which enhanced function host device  200  sends a message to baseband modem  120 . 
     The two mailboxes are used to resolve conflicts when both enhanced function host device  200  and the baseband modem  120  want to access SD memory at the same time. Baseband modem  120  sends an access request message to enhanced function host device  200  via the outgoing mailbox, and enhanced function host device  200  responds by sending an access granted message to baseband modem  120  via the incoming mailbox. 
     Pouching controller  110  is used to couple enhanced function host device  200  with baseband modem  120 . When enhanced function host device  200  and baseband modem  120  are coupled, they share use of the wireless communicator&#39;s NAND flash memory  115 . Pouching controller  110  serves as an SD switch box, which connects two SD devices, namely, baseband modem  120  and enhanced function host device  200 , and enables switching access to SD storage between the two SD devices. 
     Reference is now made to  FIG. 47 , which is a simplified block diagram of wireless communicator  100  with pouching controller  110  in accordance with a first embodiment of the present invention. Wireless communicator  100  includes baseband modem  120 , pouching controller  110 , a NAND controller  102   a , and NAND flash memory  115 . 
     Pouching controller  110  is connected to baseband modem  120  via both a UART port  106  and a baseband SD host port  107 . Correspondingly, modem  120  includes a UART interface  161  and an SD interface  162 , respectively. 
     Pouching controller  110  is connected to SD NAND controller  102   a  via an SD port  108 . During normal operation, baseband modem  120  accesses flash memory  115  via SD port  108 . 
     Pouching controller  110  also includes pouched connector  160  for pouching wireless communicator  100  to enhanced function host device  200 , which supports SD connections. When wireless communicator  100  is pouched with enhanced function host device  200 , enhanced function host device  200  accesses NAND flash memory  115  via pouching controller  110 . It is noted that access to NAND flash memory  115  is not required to pass through base band modem  120 . As such, baseband modem  120  may be in sleep mode or shutdown mode during operations between enhanced function host device  200  and NAND flash memory  115 . 
     For memory storage, wireless communicator  100  also includes an internal SRAM memory  163 , and an external memory interface (EMIF)  164  connected to an SDRAM memory  166 . 
     Reference is now made to  FIG. 48 , which is a simplified flowchart of a method for booting the wireless communicator&#39;s baseband modem  120 , and for performing subsequent operations in accordance with an embodiment of the present invention. At step  2210  the baseband modem is booted in peripheral mode. In general, when a baseband modem is booted in peripheral mode, the internal ROM code in the modem looks for code that is input via a peripheral interface, including inter alia a UART or a USB interface. The base band modem retrieves such code and transfers it to internal SRAM  163 , and then transfers control to SRAM  163 . 
     At step  2220  pouching controller  110  reads a secondary boot code image from NAND flash  115 , via NAND controller  102   a . At step  2230  pouching controller  110  loads the secondary boot code image via its UART port  106  to baseband modem  120 . 
     At step  2240  a boot loader of baseband modem  120  loads the secondary boot code to internal SRAM  163 , and begins executing the secondary boot code. At step  2250  the executing code loads the full code image from NAND flash  115  via the pouching controller&#39;s SD port  108 , to internal SRAM  123  or to external SDRAM  166 , or to both. At step  2260 , during operation, baseband modem  120  accesses NAND flash  115  via the pouching controller&#39;s SD port  108 , as a standard SD memory card. 
     In accordance with an embodiment of the present invention, baseband modem  120  communicates with enhanced function host device  200  via its controller  260 , using mailboxes implemented in pouching controller  110 . Specifically, pouching controller  110  includes two mailboxes, an outgoing communicator mailbox  117  that is written to by baseband modem  120  and read from by enhanced function host device  200 , and an incoming communicator mailbox  118  that is written to by enhanced function host device  200  and read from by baseband modem  120 . Pouching controller  110  initiates an interrupt to enhanced function device pouching controller  210  when modem  120  completes a write operation to mailbox  117 . Such interrupt may be implemented as an SDIO interrupt on an SD bus, or as a dedicated signal. Similarly, enhanced function device pouching controller  210  initiates an interrupt to baseband modem  120  when enhanced function host device  200  completes a write operation to mailbox  118 . 
     It will thus be appreciated by those skilled in the art that mailboxes  117  and  118  may be used for direct transfer of data between baseband modem  120  and enhanced function host device  200 . In one embodiment of the present invention, each mailbox  117  and  118  includes 512 bytes, of which the first two bytes are header bytes that store a message type, and the remaining bytes store the message itself. 
     Mailboxes  117  and  118  may be mapped to an SDIO register map on the base band modem side and on the enhanced function host device side. Alternatively, mailboxes  117  and  118  may be mapped to SD memory space. In such case an arbitration algorithm is used to resolve conflicts when both enhanced function host device  200  and baseband modem  120  try to access SD storage at the same time. 
     Reference is now made to  FIG. 49 , which is a simplified flowchart of a method for communicating between enhanced function host device  200  and the wireless communicator&#39;s baseband modem  120 , and accessing SD storage  115  in accordance with an embodiment of the present invention. At step  2310 , base band modem  120  requests access to SD storage  115  from enhanced function host device  200 , by writing an access request message to mailbox  117 . At step  2320  pouching controller  110  issues an interrupt to enhanced function host device  200 , to notify enhanced function host device  200  of the message that was written. At step  2330  enhanced function host device  200  reads the message from mailbox  117 . 
     At step  2340  enhanced function host device  200  grants the storage access request by writing an access granted message to mailbox  118 . The write operation at step  2340  is performed as a multiple block write operation. Multi-block writes are described in the SD specification, Part I: Physical Layer, Simplified Specification Version 2.00, Sep. 25, 2006. 
     At step  2340 , the first block of the multi-block write includes the grant of access message, and the rest of the blocks are dummy blocks that are filled with zeros. At step  2350  pouching controller  110  recognizes the first block of the message as a grant of access, and holds a busy state on the SD host bus before reading the second block, thereby forcing the enhanced function device pouching controller  210  to hold and not access the SD bus. 
     At step  2360  baseband modem  120  is notified that its access request was granted, via a dedicated interrupt line, by reading mailbox  118 . Baseband modem  120  can then proceed to access SD storage  115 . At step  2370  base band modem  120  performs its operations on SD storage  115 . At step  2380 , upon completion of using SD storage  115 , baseband modem  120  writes a free message to pouching controller  110 . Finally, at step  2390  pouching controller  110  removes the busy state from the SD host bus. 
     Generally there is a timeout of 250 msec for a busy period. As such, pouching controller  110  ensures that access to SD storage  115  is shorter than this time. 
     Reference is now made to  FIG. 50A , which is a simplified diagram illustrating a process of enabling a baseband modem to access SD storage, where pouching controller  110  coordinates between the baseband modem and enhanced function host device in accordance with a first embodiment of the present invention.  FIG. 50A  is arranged as a time line advancing from left to right. Three types of data flow are illustrated along the time line; namely, a logical arbitration state, communication between enhanced function host device  200  and pouching controller  110 , and communication between the wireless communicator&#39;s base band modem  120  and pouching controller  110 . 
     Logical arbitration involves a protocol for switching access to SD storage  115  between baseband modem  120  and enhanced function host device  200 , which share SD storage  115 . As described hereinabove with respect to  FIG. 49 , arbitration operates by means of access requests and access grants written to mailboxes  117  and  118 . 
     Communication between enhanced function host device  200  and Pouching controller  110 , and between the wireless communicator&#39;s baseband modem  120  and pouching controller  110 , occurs via command signals, data signals and interrupt signals. Data blocks are followed by CRC error checking codes. 
     As shown in  FIG. 50A , when the wireless communicator&#39;s baseband modem  120  wants to access SD storage  115 , it writes an access request message to the wireless communicator&#39;s outgoing mailbox  117 . Thereafter, pouching controller  110  issues an interrupt to enhanced function host device  200 , informing it that there is a message waiting in mailbox  117 . Enhanced function host device  200  then reads the access request message in mailbox  117 , and writes a multi-block access grant message to the wireless communicator&#39;s incoming mailbox  118 . Pouching controller  110  recognizes the first block of the multi-block as an access grant message, and holds a busy state. Pouching controller  110  issues an interrupt to baseband modem  120 , indicating that access to SD storage  115  is granted. Baseband modem  120  then accesses SD storage  115  and performs its requisite operations. Upon completion, baseband modem  120  writes a release message to pouching controller  110 , which then releases the busy state. In turn, enhanced function host device  200  is then able to write the second block (dummies) to the wireless communicator&#39;s incoming mailbox  118 . 
     Reference is now made to  FIG. 50B , which is a simplified diagram illustrating a process of enabling a baseband modem to access SD storage, where pouching controller  110  coordinates between the baseband modem and enhanced function host device in accordance with a second embodiment of the present invention. As shown in  FIG. 50B , an access grant write command is not needed, and the reading of the baseband modem access request suffices to trigger the busy state for enhanced function host device  200 . Whereas in the embodiment of  FIG. 50A  a multi-block write by enhanced function host device  200  is used to generate the busy state, in the embodiment of  FIG. 50B  a single-block read suffices to initiate the busy state. 
     Baseband modem  120  may be idle for a long period of time if no call or data exchange is underway and there is time to wait until a next signaling session with a cellular network. In such case, base modem  120  may drop to a sleep mode. Moreover, in order to conserve power consumption in sleep mode, baseband modem  120  may shut off SDRAM power, which results in losing the code image on SDRAM  166 . In order to enable proper operation, baseband modem  120  maintains state parameters in internal SRAM  163 . Alternatively, or in addition, base band modem  120  backs up state parameters in internal SRAM  163  prior to going to sleep. 
     In this regard, reference is now made to  FIG. 51 , which is a simplified flowchart of a method for a sleep mode in accordance with an embodiment of the present invention. At step  2410  baseband modem  120  is idle for a long period of time. At step  2420  base band modem  120  backs up state parameters in internal SRAM  163 . At step  2430  baseband modem  120  sets the secondary boot code that was loaded to SRAM  163  at step  2240  as the code to be executed upon resumption of power. At step  2440  baseband modem  120  sets a timer for resumption of power, halts internal controller operation, and then disconnects power to external SDRAM  166 . 
     Reference is now made to  FIG. 52 , which is a simplified flowchart of a method for resuming operation after a sleep mode in accordance with an embodiment of the present invention. At step  2510  the timer that was set at step  2440  expires. At step  2520  power is resumed. At step  2530  baseband modem  120  begins executing the secondary boot code, based on the setup defined at step  2430 . Finally, at step  2540  the secondary boot code loads the code image into external SDRAM  166 , and transfers control thereto. 
     In reading the above description, persons skilled in the art will realize that there are many apparent variations that can be applied to the methods and systems described. In particular, components of  FIG. 47  that are shown integrated may be separated, and components that are shown as separated may be integrated. In this regard, reference is now made to  FIG. 53 , which is a simplified block diagram of a cellular handset in accordance with a second embodiment of the present invention. In the embodiment illustrated in  FIG. 53 , an SD NAND controller  102   b  is integrated within pouching controller  110 . In distinction, SD NAND controller  102   a  is external to pouching controller  110  in  FIG. 47 . 
     When SD NAND controller  102   b  is integrated within pouching controller  110 , pouching controller  110  can directly access NAND flash  115 . As such, at step  2120  of  FIG. 48 , pouching controller  110  reads the boot code image directly from NAND flash  115 , without using an external NAND controller. 
     11. Power Management of the Wireless Communicator when its Battery Lapses 
     Embodiments of the present invention concern power management of wireless communicator  100 , so as to mitigate the problem of inability to turn on and use wireless communicator  100  even when wireless communicator  100  is connected to an external power source, by graduating power modes via an intermediate limited use mode prior to shut down mode. 
     More generally, aspects of the present invention concern power management for a mobile electronic device in order to preserve life of a battery, or a battery pack, within the device. The mobile device can run in standalone mode, or in an external power mode. When running in standalone mode the battery loses charge, and when running in external power mode the battery is re-charged by the external power source. 
     In order to prevent a shutdown of the device, without being able to turn the device back on, when the charge of the battery drops below a power-on reset (POR) threshold, a lockout power mode is enabled prior to the POR threshold being reached. The lockout power mode, referred to as a “provisional mode” and also as an “emergency mode”, enables the mobile device to be used only for limited actions and only for a pre-specified period of time. Thus a cellular telephone, for example, in provisional mode, may be turned on and used only for making emergency calls. This enables the user of the telephone to turn on the phone and call for help for a limited time period after his cell phone has shut down. In another scenario, the cellular telephone in provisional mode may be enabled for speed dial calls, thus enabling a child to turn on his phone and call his parents for a limited time period after the child&#39;s cell phone has shut down. 
     The present invention monitors the mobile device&#39;s battery voltage and places the mobile device in one of several power mode states, depending on the battery voltage and depending on whether the mobile device is running on its internal battery or connected to an external power source. The transitions between power mode states are controlled so that a user of the mobile device is able to make limited emergency-type actions for a limited time period after the mobile device has been shut down. 
     Multiple power modes for the mobile device are managed, including a fully operation power mode, a non-operational (shut-down) power mode, and a provisional power mode. The provisional power mode enables the device to be turned on for limited emergency-type use, for a short period of time. Transitions between power modes are governed by increases and decreases in battery voltage, and by the mobile device being connected to or disconnected from an external power source. 
     Reference is now made to  FIG. 54 , which is a simplified block diagram of a power management system, for preserving life of battery  145  in wireless communicator  100  in accordance with an embodiment of the present invention. Shown in  FIG. 54  is wireless communicator  100  and its baseband modem  120  for transmitting and receiving digital audio signals via its GSM antenna  140 . power amplifier  135  is used to amplify signals transmitted by antenna  140 . Wireless communicator  100  operates under control of its dedicated controller  105 . 
     Wireless communicator  100  uses its internal battery  145  for supplying power. In addition, wireless communicator  100  uses an external power adapter  146 , for connecting wireless communicator  100  to an external source such as an AC electrical socket, or to an external device, such as a computer, which is able to supply some of its own power to wireless communicator  100 . 
     Wireless communicator  100  may operate in a standalone mode, powered by battery  145 . Alternatively, wireless communicator  100  may operate in an external power mode, powered by an external source. In accordance with an embodiment of the present invention, battery  145  is a re-chargeable lithium ion battery, and generally when wireless communicator  100  operates in external power mode, some of the external power is used to charge battery  145 . 
     The voltage on battery  145 , denoted by VBat, changes continuously with time. Without being re-charged, VBat for a lithium ion battery typically decays according to a known discharge curve. Wireless communicator&#39;s power manager  125  ensures that wireless communicator  100  is shut down when VBat falls below a reset threshold, in order to avoid damage to battery  145  and to wireless communicator  100 . 
     In accordance with an embodiment of the present invention, power manager  125  includes logic for a lockout mechanism that is functional when LTOT&lt;VBat&lt;UTOT, for pre-defined lower and upper turn-on thresholds LTOT and UTOT, respectively, and when wireless communicator  100  is not connected to an external power source. The lockout mechanism serves to put wireless communicator  100  into a provisional mode, also referred to as an emergency mode, in which operation of wireless communicator  100  is limited to one or more emergency functions. Emergency functions may include inter alia making an emergency phone call, and making a speed dial phone call. 
     In an embodiment of the present invention, LTOT is a threshold below which wireless communicator  100  cannot be turned on, and UTOT is slightly higher than LTOT. Sample settings are LTOT=3.2V and UTOT=3.3V. The provisional mode of the present invention enables wireless communicator  100  to shut down methodically and in a controlled manner, so that it can be turned on for emergency calls after being shut down. 
     Power manager  125  controls wireless communicator  100  in accordance with TABLE VIII. As indicated in TABLE VIII, when VBat drops below 2.7V, referred to as a “power-on reset” (POR) threshold, then power manager  125  shuts down wireless communicator  100  and prevents it from being turned on. This protects battery  145  from suffering permanent damage. Generally, when VBat drops below 2.7V, power manager  125  asserts a reset signal. The reset remains asserted until a safety period after VBat rises above 2.7V. 
     When VBat is between 2.7V and 3.2V, then power manager  125  enables wireless communicator  100  to operate in external power mode, but not in standalone mode. The threshold of 3.2V is referred to as a “turn-on” threshold, and also referred to herein as the lower turn-on threshold (LTOT). When wireless communicator  100  is operating in standalone mode and VBat falls below 3.2V, then power manager  125  turns wireless communicator  100  off, and prevents it from being turned back on until VBat rises above 3.2V. 
     When VBat is above 3.2V then power manager  125  enables wireless communicator  100  to operate in external power mode, and when VBat is above 3.3V then power manager  125  enables wireless communicator  100  to also operate in standalone mode. The threshold of 3.3V is referred to herein as the upper turn-on threshold (UTOT). 
     However, when VBat is between 3.2V and 3.3V, then power manager  125  limits wireless communicator  100  to operate in provisional mode. In provisional mode wireless communicator  100  can be turned on for a pre-defined time period, such as 30 seconds, and can only be used for one or More emergency functions, such as making an emergency call. 
     It will be appreciated by those skilled in the art, from the nature of the steep decline at the end of battery discharge curves, that raising the turn-on threshold for cellular telephone  200  from 2.7V to 3.3V has negligible impact on usage time. The drop from 3.3V to 2.7V occurs in a few minutes. 
     
       
         
               
             
               
               
               
             
           
               
                 TABLE VIII 
               
             
             
               
                   
               
               
                 Power Management Logic for Wireless Communicator 
               
             
          
           
               
                 Battery Voltage (VBat) 
                 External Power Mode 
                 Standalone Mode 
               
               
                   
               
               
                 VBat ≦ 2.7 V 
                 Communicator cannot be 
                   
               
               
                   
                 turned on. 
               
               
                   
                 During operation, if the 
               
               
                   
                 voltage drops below this 
               
               
                   
                 threshold, then the 
               
               
                   
                 communicator is 
               
               
                   
                 automatically turned off. 
               
               
                 2.7 V &lt; VBat ≦ 3.2 V 
                 Communicator cannot be 
               
               
                   
                 turned on. 
               
               
                   
                 During operation, 
               
               
                   
                 communicator operates 
               
               
                   
                 normally unless the voltage 
               
               
                   
                 drops below POR threshold 
               
               
                   
                 (2.7 V) 
               
               
                 3.2 V &lt; VBat ≦ 3.3 V 
                 Communicator can be 
                 Communicator can be turned on 
               
               
                   
                 turned on. 
                 in provisional mode. 
               
               
                   
                 Communicator operates 
                 After a pre-defined time period, 
               
               
                   
                 normally. 
                 the communicator is 
               
               
                   
                   
                 automatically turned off. 
               
               
                 VBat &gt; 3.3 V 
                   
                 Communicator operates 
               
               
                   
                   
                 normally. 
               
               
                   
                   
                 During operation, if the voltage 
               
               
                   
                   
                 drops below the upper threshold 
               
               
                   
                   
                 (3.3 V), then the communicator 
               
               
                   
                   
                 is automatically turned off. 
               
               
                   
               
             
          
         
       
     
     It will further be appreciated by those skilled in the art that the parameter values POR=2.7V, LTOT=3.2V and UTOT=3.3V are example values, and that other values for these parameters are within the scope of the present invention. 
     Reference is now made to  FIG. 55 , which is a simplified flowchart of a method for preserving life of a battery in wireless communicator  100  in accordance with an embodiment of the present invention. At step  2605  wireless communicator  100  is turned on. At step  2610  the voltage of wireless communicator&#39;s battery  145  is continually monitored. At step  2615  a determination is made whether wireless communicator  100  is connected to an external power source. 
     If wireless communicator  100  is connected to an external power source, then its internal battery  145  is being charged. At step  2620  a further determination is made whether the battery voltage is higher than a lower turn-on threshold, denoted LTOT. If so, then at step  2625  wireless communicator  100  is power controlled so as to be fully operational. If not, then at step  2630  wireless communicator  100  is power controlled so as to be able to operate, but cannot be turned on after it has been turned off. 
     Referring back to step  2615 , if wireless communicator  100  is not connected to an external power source, then it is running in standalone mode and being powered by its internal battery. The charge on its internal battery is being drained. At step  2635  a determination is made whether the battery voltage is higher than an upper turn-on threshold, denoted UTOT. It so, then at step  2640  wireless communicator  100  is power controlled so as to be fully operational. If not, then at step  2645  a further determination is made whether the battery voltage is higher than the lower turn-on threshold, LTOT. If not, then at step  2650  wireless communicator  100  is power controlled so that it cannot be turned on. 
     Referring back to step  2645 , if the battery voltage is higher than LTOT, then at step  2655  wireless communicator  100  is power controlled so as to turn on to operate only in a limited provisional mode, and only for a pre-specified short period of time. When operating in provisional mode, only limited use of wireless communicator  100  is enabled. Generally, use of wireless communicator  100  is limited to one or more emergency actions. An emergency action may be making an emergency phone call. An emergency action may also be making a speed dial call. This would enable a child to call his parents, for example, if his cell phone battery runs low. 
     When wireless communicator  100  is operating in provisional mode, and a person uses wireless communicator  100  to make a phone call, a determination is made at step  2660  whether or not the call is an emergency call. If so, then the call is enabled at step  2665 . If not, wireless communicator  100  is shut down at step  2670 . 
     The voltage on wireless communicator&#39;s battery  145  continually changes. The battery&#39;s charge decreases when wireless communicator  100  is operating in standalone mode, and the charge increases when wireless communicator  100  is connected to an external power source. The flowchart of  FIG. 55  continually returns to step  2610  to monitor the voltage and power manage the telephone accordingly. 
     Reference is now made to  FIG. 56 , which is a simplified state transition diagram for power modes of wireless communicator  100  in accordance with an embodiment of the present invention. As shown in  FIG. 56 , wireless communicator  100  can be in one of four power modes; namely,
         a fully operational power mode  2610 , wherein wireless communicator  100  can be turned on and operates normally;   a provisionally operational mode  2620 , wherein wireless communicator  100  can be turned on for a pre-specified amount of time, such as 30 sec., and used for one or more emergency actions;   a critical mode  2630 , wherein wireless communicator  100  is operational, but cannot be turned on once it is turned off; and   a non-operational mode  2640 , wherein wireless communicator  100  is shut down and cannot be turned on.       

     State transitions from one power mode to another in  FIG. 56  occur when the battery voltage, VBat, drops below or rises above one of the thresholds POR, LTOT and UTOT. Voltage drops occur when wireless communicator  100  is operating in standalone mode, and the charge on battery  145  is being drained. Voltage rises occur when wireless communicator  100  is operating in external power mode, and battery  145  is being charged by an external power source. 
     State transitions in  FIG. 56  also occur when wireless communicator  100  is connected to or disconnected from an external power source. The state transitions summarized in  FIG. 56  are controlled by power manager  125  and correspond logically to the flowchart of  FIG. 55 . 
     In reading the above description, persons skilled in the art will realize that there are many apparent variations that can be applied to the methods and systems described. In particular, the power management system described hereinabove with reference to  FIG. 54 , and the power management method described hereinabove with reference to  FIG. 55  apply to a wide variety of other mobile electronic devices, in addition to wireless communicator  100 . Among the actions supported by such devices, certain actions among them are designated as being emergency actions. When the devices are placed into provisional power mode (step  2555  of  FIG. 55 ), only the emergency actions are enabled, and only for a pre-specified period of time. 
     12. Wireless Communicator Memory Expansion with Direct USB Connection 
     Embodiments of the present invention relate to wireless communicator  100  and a USB disk drive. The USB disk drive is situated within an enhanced function jacket, referred to herein as USB jacket  200 . USB jacket  200  includes a keypad, and attaches to wireless communicator  100 . 
     When wireless communicator  100  is pouched with USB jacket  200 , each device enhances the other. Wireless communicator  100  is enhanced by having additional storage and USB connectivity, and USB jacket  200  is enhanced by have wireless communication capability. Wireless communicator  100  may further enhance USB jacket  200  with additional capabilities including a music player and GPS location based services. 
     When wireless communicator  100  is pouched with USB jacket  200 ; the jacket&#39;s keypad  280  is used to input commands for wireless communicator  100 . Such commands for wireless communicator  100  include inter alia dialing a phone call, playing music, and commands for location based applications. 
     When wireless communicator  100  is not pouched with USB jacket  200 , the jacket&#39;s keypad  280  may be used to input commands for the USB disk drive. Such commands for the USB disk drive include inter alia locking and unlocking the USB disk drive using a password. 
     Reference is now made to  FIGS. 57A and 57B , which are illustrations of wireless communicator  100  pouched with USB jacket  200  in accordance with an embodiment of the present invention. USB jacket  200  has a storage and functions as a USB disk drive. USB jacket  200  has a USB connector  255  and, as such, USB jacket  200  is readily plugged into a personal computer, or such other device having a USB receptacle. 
     USB connector  255  is mechanically fastened so that it slides into USB jacket  200 . USB jacket  200  includes a strap  289  which, when pulled, causes USB connector  255  to slide back out. 
     In accordance with an embodiment of the present invention, when wireless communicator  100  is pouched with USB jacket  200 , USB jacket  200  enhances the capabilities of wireless communicator  100  by providing inter alia additional storage and USB connectivity. Similarly, wireless communicator  100  enhances USB jacket  200  with wireless communication, and may further enhance USB jacket  200  with GPS location based services, speaker capability, and headset support. 
     The USB jacket&#39;s keyboard  280  has dual functionality. When wireless communicator  100  is not pouched with USB jacket  200 , keyboard  280  is used to operate USB jacket  200 . For example, keyboard  280  may be used to lock the storage of USB jacket  200  using a password; i.e., the disk drive of USB jacket  200  may be locked and unlocked by entering a password using keyboard  280 . When wireless communicator  100  is pouched with USB jacket  200 , then keyboard  280  is used to operate wireless communicator  100 . 
     Reference is now made to  FIG. 58 , which is a simplified block diagram of wireless communicator  100  and USB jacket  200  in accordance with an embodiment of the present invention. Wireless communicator  100  is shown in  FIG. 58  with six primary components; namely, pouching controller  110 , storage  115 , modem  120 , power management subsystem  125 , power amplifier  135  and pouch connector  160 . Wireless communicator  100  is shown with four optional components; namely, audio subsystem  130 , keyboard  180 , display  185  and SIM  190 . 
     USB jacket  200  is shown in  FIG. 58  with six primary components; namely, storage controller  205 , pouching controller  210 , storage  215 , USB connector  255 , pouch connector  260  and keyboard  280 . USB jacket  200  is shown with an optional USB hub  257  and optional display  285 . 
     In the embodiment shown in  FIG. 58 , keyboard  280  is connected to storage controller  205 , which interprets the keyboard scan codes. Storage controller  205  mediates between keyboard  280  and a USB connected device, such as a personal computer, connected to USB connector  255 . 
     In general, a USB hub allows many USB devices to be connected to a single USB port. USB hub  257  is connected via a USB line to modem  120  or to pouching controller  110  of wireless communicator  100 , or to both of them. USB hub  257  enables a device connected to USB connector  255  to access both storage  215  and storage  115 . 
     In the embodiment shown in  FIG. 58 , access to storage  115  is made via USB hub  257 , without passing through pouching controller  210 . 
     In the embodiment shown in  FIG. 58 , keyboard  280  is connected to storage controller  205  and pouching controller  210 . When wireless communicator  100  is pouched with USB jacket  200 , pouching controller  210  scans the matrix keyboard for keyboard  280 , and passes the scan-code to wireless communicator  100 . To avoid ambiguity, only pouching controller  210  initiates the matrix keyboard scanning. 
     Reference is now made to  FIG. 59 , which is a simplified block diagram of wireless communicator  100  and USB jacket  200 , in accordance with a second embodiment of the present invention. The USB jacket shown in  FIG. 57  includes pouching controller  210 , USB connector  255 , pouch Connector  260  and keyboard  280 . 
     In addition, the USB jacket in  FIG. 59  includes a micro-SD card  296 , a single-pole double-throw (SPDT) switch  292 , and a USB2SD bridge  293  between USB to SD. The AU6336 SD/MMC card reader controller manufactured by Alcor Micro, Corp. of Taiwan, may be used for USB2SD bridge  293 . Micro-SD card  296  includes a controller  297  and a storage  298 . It is noted that in distinction, the jacket controller and storage are separate components in the embodiment shown in  FIG. 58 . SPDT switch  292  is controlled by pouching controller  210 , and enables connection of USB jacket  200  with wireless communicator  100  directly via modem  120  or via pouching controller  110 . A proprietary command over the USB channel, such as an SCSI transparent method, instructs pouching controller  210  to changes the state of SPDT  292 . 
     It will be appreciated by those skilled in the art that The system of  FIG. 9  enables a USB host device that is connected to USB Jacket  200  via USB interface  255  to directly access storage  298 , by translating the USB protocol into the SD protocol, and routing through pouching controller  210 , or to indirectly access storage  115 . 
     Pouching controller  210  dynamically routes access to appropriate storage  115  or  298  to the USB host device. Pouching controller  210  introduces the USB host device to both storage  115  and  298 , as a combined storage area or as two separate storage areas. 
     13. Modular Audio Player that Pouches with a Host Media Player 
     Embodiments of the present invention relate to a modular audio player, referred to herein as the “modular player”, that may be pouched with a digital media player, referred to herein as the “host” or the “host player”, such as an MP3 player that may be pouched with an MP3/MP4 player. Both players have memories for storing digital files, and the host&#39;s controller or the modular audio player&#39;s controller, or both controllers, are able to automatically or manually synchronize files stored in the two memories. 
     The host player has its own battery, its own non-volatile memory for storing media files, and its own controller. The host player generally includes a display, and includes user interface controls to organize, select, play and view metadata for songs or video files. 
     The modular player may be hosted by the host player when pouched therewith. The modular player is also a standalone audio player, but with limited features in comparison to the host player. The modular player includes its own battery sub-system, its own removable non-volatile memory for storing digital audio files, and its own controller. The modular player also includes a wireless modem, including inter alia a cellular modem, a WLAN modem or a WiMax modem, which enables download of digital media files from remote sources. The modular player generally does not have its own display, and generally has a limited user interface to play a song, to advance to a next song, and to return to the beginning of a song. 
     The modular player is used in circumstances where it is convenient for a user to handle a small player. When a user is jogging, for example, it is easier for him to carry a small player. 
     The media files played by either player may be obtained via the host&#39;s connection to remote media sources, via physical USB or SD connection, or via wireless connection. The media files may also be obtained via the modular player&#39;s wireless modem connection. Media files obtained via the modular player&#39;s wireless modem may be transferred to the host player. As such, the modular player may be used to download files intended for the host player, such as video files, which generally cannot be played on the modular player. 
     In one embodiment of the present invention the host controller synchronizes the media files stored on the host player and the modular player. In another embodiment of the present invention, the modular player&#39;s controller synchronizes the media files stored on the host player and the modular player. Synchronization of media files is based primarily on the media formats that each player supports. Generally, the modular player supports only audio formats, such as MP3 formats, where the host player supports also video formats, such as MP4 formats. As such, when the two players interact to synchronize their respective memories, only files supported by each player are stored in the player. 
     Additionally, synchronization is governed by user preferences. For example, a user may specify that those songs which are most often played or most recently played, or which have high rankings, are to be shared on both players. 
     Reference is now made to  FIGS. 60A and 60B , which are simplified block diagrams of a modular audio player pouched with a digital media player in accordance with an embodiment of the present invention. Shown in  FIGS. 60A and 60B  are a host media player  200   c  and a modular audio player  100 . Modular audio player  100  can be pouched with host media player  200   c . Modular audio player  100  slides in and out of host media player  200   c  along tracks  261   c . Host media player  200   c  and modular audio player  100  are Operative to play songs stored in digital audio files. Host player  200   c  is also operative to play video files. 
     Host media player  200   c  includes a player module  230   c . Host player  200   c  also includes a storage unit  215   c , which is generally HD or flash memory, for storing digital media files. Host media player  200   c  also includes a battery subsystem  225   c  for powering player module  230   c.    
     Modular audio player  100  includes a player module  130 . Modular audio player  130  also includes a storage unit  115 , which is generally a built-in flash memory such as NAND flash or a detachable memory card such as an SD card, or both, for storing digital audio files. 
     Modular audio player  100  is powered by a battery subsystem  125  that includes a small removable battery. Battery subsystem  125  is charged by battery subsystem  225   c , when modular audio player  100  is pouched with host player  200   c . When modular audio player  100  is not pouched with host player  200   c , it is powered by battery subsystem  125 , until the stored charge in battery subsystem  125  is exhausted. Battery subsystem  125  may also be charged from an external power source, via a charger, or via a USB connection. 
     Pouch connectors  160  and  260   c  are used to transfer data and power between host media player  200   c  and modular audio player  110 . 
     Incoming data may be transferred to host media player  200   c  via an external connector  255   c , such as a USB port or an SD connector, or both. Host media player  200   c  may optionally include a wireless modem  220   c , through which data is received from remote sources. 
     Modular audio player  100  includes a wireless modem  120   c , which is generally a cellular modem. 
     Host player  200   c  includes pouch controller  210   c , and removable audio player  100  includes pouch controller  110 . Controllers  110  and  210  are operative to store incoming digital files on either or both of host memory  215   c  and removable player memory  115 , automatically or manually as instructed by a user. Synchronization of files between the host media player  200   c  and modular audio player  100  is described hereinbelow with respect to  FIGS. 61 and 62 . 
     Host media player  200   c  is large enough to include a display  285   c , for displaying command menus and song metadata to a user, and for displaying videos. Host media player  200   c  also includes user interface controls  270   c , for organizing, playing and selecting media files. User interface controls  270   c  also enable a user to manage files stored in host memory  215   c  and removable player memory  115 . User interface controls  270   c  enable a user to select to which or both of memories  115  and  215   c  incoming files are to be saved. User interface controls  270   c  also enable a user to add and delete files from memories  115  and  215   c , and to copy media files from one memory to another. 
     As distinct from host media player  200   c , modular audio player  100  may not have a display at all, or may have a simple LCD display  185 . Modular audio player  100  includes limited user interface controls  170  including a small keyboard  180 . Keyboard  180  enables a user to perform basic functions, including inter alia playing a song, advancing to a next song, and returning to the beginning of a song. 
     Host media player  200   c  may or may not be operative to play media when modular player  100  is not pouched therewith. 
     It will be appreciated by those skilled in the art that the configuration illustrated in  FIGS. 60A and 60B  is but one of many possible implementations of the present invention, and that the various components in  FIGS. 60A and 60B  may be positioned and inter-connected differently than the specific configuration illustrated in  FIGS. 60A and 60B , within the scope of the present invention. 
     Reference is now made to  FIG. 61 , which is a simplified flowchart of a method for synchronizing media files between host media player  200   c  and modular audio player  100 , when the media files are received by modular audio player  100  in accordance with an embodiment of the present invention. At step  2805  new media files are downloaded via cellular wireless modem  120  of modular audio player  100 . At step  2810  the files are stored in a temporary allocated memory of storage  115 , and marked as new files. The new files are classified as being audio files or other files. 
     At step  2815  a determination is made whether or not modular audio player  100  is currently pouched with host media player  200   c . If so, then at step  2820  a determination is made whether there are more new files to process. If so, then at step  2825  processing advances to the next new file. At step  2830  a message is sent to host media player  200   c , indicating that there is a media update. At step  2835  a determination is made whether the new file currently being processed is an audio file. If so, then at step  2840  a duplicate copy of the file is written to storage  215   c  of host media player  200   c . Processing then advances to step  2820 , to process the next file. If all of the new files have already been processed, then the synchronization ends. If the new file currently being processed is not an audio file, as determined at step  2835 , then at step  2845  the file is copied to storage  215   c  of host media player  200   c , and at step  2850  the new files is erased from storage  115 . Processing then advances to step  2820 . 
     If modular audio player  100  is not currently pouched with host media player  200   c , as determined at step  2715 , then at step  2855  a determination is made whether there are more new files to process. If so, then at step  2860  processing advances to the next new file. At step  2865  a determination is made whether the new file currently being processed is an audio file. If not, then at step  2870  a determination is made, generally based on user preferences, whether or not to erase the new file from storage  115  or else to keep the new file in storage  115  until modular player  100  is subsequently attached to host player  200   c . If so, then at step  2875  the new file is erased. Otherwise, at step  2880  no operation is required. Processing then advances to step  2855 , to process the next file. If the new file currently being processed is an audio file, as determined at step  2865 , then at step  2880  no operation is required. When modular audio player  100  is subsequently attached to host media player  200   c , the new audio files in storage  115  may be transferred to host storage  215   c . Processing then advances to step  2855 . 
     Reference is now made to  FIG. 62 , which is a simplified flowchart of a method for synchronizing media files between host media player  200   c  and modular audio player  100 , when the media files are received by host player  200   c  in accordance with an embodiment of the present invention. At step  2905  new media files are received by host media player  200   c , via wireless modem  220   c  or external connector  255   c . At step  2910  the files are stored in host memory  215   c  and marked as new files. The new files are classified as being audio files or other files. 
     At step  2915  a determination is made whether modular audio player  100  is currently pouched with host media player  200   c . If so, then at step  2920  a determination is made whether there are more new media files to process. If so, processing advances to the next new media file at step  2925 . At step  2930  a determination is made whether the new media file currently being processed is an audio file. If so, then at step  2935  the new file is copied to storage  115 . Processing then advances to step  2920 , to process the next new file. If all of the new files have been processed, then the synchronization ends. If the new file currently being processed is not an audio file, as determined at step  2930 , then processing advances directly to step  2920 . 
     If modular audio player  100  is not currently pouched with host media player  200   c , as determined at step  2915 , then at step  2940  no operation is required, and the new files may be transferred to modular audio player  100  when it is subsequently pouched with host media player  200   c . The synchronization then ends. 
     Reference is now made to  FIG. 63 , which is a simplified flowchart of operations carried out when modular audio player  100  is pouched with host media player  200   c  in accordance with an embodiment of the present invention. At step  3005  modular audio player  100  is pouched with host media player  200   c . When the two players are pouched, host player  200   c  receives a corresponding interrupt, and is thus informed of the pouching at step  3010 . Such interrupt may be implemented as an SDIO interrupt on the SD bus, or via a dedicated signal. 
     At step  3020 , memories  115  and  215   c  are searched and a determination is made whether there are new media files in one or both of the memories. If so, then the host player are modular player are synchronized in accordance with  FIGS. 61 and 62 . Specifically, steps  2820 - 2850  are performed to copy new files from memory  115  to memory  215   c , and steps  2920 - 2935  are performed to copy new files from memory  215   c  to memory  115 . 
     Processing then proceeds to step  3025 , whereat the players are synchronized according to predefined user preferences. User preferences may indicate, for example, that all audio files are synchronized, subject to memory availability; or that audio files most often or more frequently listened to are synchronized, subject to memory availability; or that audio files with high user ratings are synchronized, subject to memory availability. 
     If there are no new media files in memories  115  and  215   c , as determined at step  3020 , the processing proceeds directly to step  3025 . After step  3025 , the synchronization ends. 
     In the foregoing specification, the invention has been described with reference to specific exemplary embodiments thereof. It will, however, be evident that various modifications and changes may be made to the specific exemplary embodiments without departing from the broader spirit and scope of the invention as set forth in the appended claims. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense.