# Patent

## Title
Electronic devices having integrated reset systems and methods thereof

## Abstract

Methods and devices for power cycling an electronic device are provided. Also provided are systems and kits.

## Background
RELATED APPLICATION
This application is a continuation of U.S. application Ser. No. 13/664,061 filed Oct. 30, 2012, which application claims priority to provisional application No. 61/553,942 filed Oct. 31, 2011, entitled “Electronic Devices Having Integrated Reset Systems and Methods Thereof”, the disclosures of which are incorporated herein by reference for all purposes.


BACKGROUND
In using electronic devices, such as computers, smart phones, PDAs, etc., a user may experience a situation in which the electronic device “hangs” or “crashes”. A hang, sometimes referred to as a “freeze”, occurs when the device ceases to respond to inputs. In the most commonly encountered scenario, the device's display becomes static and is unresponsive to any user input, e.g., clicking or movement of a mouse cursor, typing on a keyboard, or touching a touch screen, etc. Many modern operating systems provide the user with a means to terminate a hung program or device without rebooting or power cycling the device. In more severe hangs, however, the device may have to be power cycled, which is often accomplished with an on/off or reset button provided on the device. A crash, on the other hand, is a condition in which the electronic device or a program, either an application or part of the operating system, ceases to function properly, often exiting after encountering errors. This is different from a hang or freeze where the application or operating system continues to run without obvious response to input.
Often, the only way to recover from a hang or crash is to reboot or reset the device, usually by turning it off and then on again—called power cycling. Power cycling typically involves resetting or clearing any pending errors or events and then bringing the system to normal conditions or to an initial or default state in a controlled manner. Depending on the device configuration, a device may be able to automatically reset itself by means of an internal program which is triggered if a command times out. However, such a timing out does not always occur or is too lengthy, and even if pending, a user often has no way of knowing if and when the reset will happen. As such, most conventional electronic devices have a means to enable a user action for manually initiating a reset. One such common means is a reset button, the location of which is not always obvious (e.g., it may be recessed within the device housing) and may require an extra tool (e.g., paperclip or the like) to access. Alternatively, the power cycling or reset may require simultaneously or serially pressing or holding a designated combination of keys (e.g., user interface keys), the combination of which may be unknown or not readily available to a user. Other ways in which a device can be configured to be reset is by prolonged removal of the battery or batteries or by installing the batteries upside down (i.e., the positive side of the battery is connected to the positive contact in the battery receptacle, and the same for the negative). Often, these actions are neither obvious nor effortless for users, require extra electro-mechanical hardware and/or require additional device housing access points, all of which add to the cost of the device and increase the risk of electrostatic discharge (ESD) and liquid ingress issues.
Accordingly, it would be desirable and beneficial to provide means and methods of resetting or power cycling electronic devices which overcome the disadvantages of the prior art.
SUMMARY
Certain embodiments of the present disclosure include power cycling an electronic device having a data processor, enabling a reset circuit to provide a reset signal to the data processor, supplying power to the data processor while enabling the reset circuit, disabling the reset circuit while maintaining power to the data processor, enabling the reset circuit while maintaining power to the data processor, and removing power to the data processor while enabling the reset circuit.
Certain embodiments include a device housing that encases power cycling electronic components of the electronic device including a printed circuit board, a data processor, a power interface circuit that provides at least one power input line to the data processor, a reset circuit that provides a reset signal to the data processor via a reset line, a battery receptacle terminal configured to receive a battery pack including at least one cathode terminal, at least one anode terminal, and at least one reset pad electrically coupled to an input of the reset circuit, and a battery pack including a housing and at least one battery retained in the housing and positioned between at least one battery between the at least one cathode terminal and the at least one anode terminal, the battery configured as the supply voltage of the electronic device, wherein the reset circuit includes a reset switch positioned between the reset circuit and system ground.
Certain embodiments include power cycling an electronic device having a data processor including receiving an electrical short from at least one battery, receiving a first voltage input signal from one or more reset lines that is HI, receiving a second voltage input signal from one or more power lines that is LO, receiving a third voltage input signal from the one or more power lines that is HI, determining that the first voltage input signal from the one or more reset lines remains HI, receiving a fifth voltage input signal from the one or more reset lines that is LO, and determining that the third voltage input signal from the one or more power lines remains HI.
These and other embodiments, objects, advantages, and features of the disclosure will become apparent to those persons skilled in the art upon reading the details of exemplary embodiments of the disclosure as more fully described below.



BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the present disclosure are best understood from the following detailed description when read in conjunction with the accompanying drawings. It is emphasized that, according to common practice, the various features of the drawings are not to scale. On the contrary, the dimensions of the various features are arbitrarily expanded or reduced for clarity. Included in the drawings are the following figures:
FIG. 1 is a block diagram of a portion of a device's electronics including power cycling and/or reset circuitry of one or more embodiments of the present disclosure;
FIGS. 2A and 2B are top and side cutaway views, respectively, of certain structural embodiments of an electronic device having a configuration for power cycling and/or reset upon battery insertion into and/or removal from the device;
FIG. 2C is an enlarged view of the area noted in FIG. 2B;
FIGS. 3A and 3B are top and side cutaway views of the device of FIGS. 2A and 2B in a first stage of battery insertion (or, in reverse sequence, a third stage of battery removal) for implementing a power cycling or reset procedure of certain embodiments of the present disclosure;
FIGS. 4A and 4B are top and side cutaway views of the device of FIGS. 2A and 2B in a second stage of battery insertion (or, in reverse sequence, a second stage of battery removal) for implementing a power cycling or reset procedure of certain embodiments of the present disclosure;
FIGS. 5A and 5B are top and side cutaway views of the device of FIGS. 2A and 2B in a final stage of battery insertion (or, in reverse sequence, a first stage of battery removal) for implementing a power cycling or reset procedure of certain embodiments of the present disclosure; and
FIGS. 6A and 6B are graphs showing the status of the reset and power lines, respectively, of the device of FIGS. 2A and 2B during the various stages of battery insertion/removal of FIGS. 3A/3B, 4A/4B and 5A/5B.



DETAILED DESCRIPTION
Before the present disclosure is further described, it is to be understood that this disclosure is not limited to particular embodiments described, as such may, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting, since the scope of the present disclosure will be limited only by the appended claims.
As will be apparent to those of skill in the art upon reading this disclosure, each of the individual embodiments described and illustrated herein has discrete components and features which may be readily separated from or combined with the features of any of the other several embodiments without departing from the scope or spirit of the present disclosure.
Where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limit of that range and any other stated or intervening value in that stated range, is encompassed within the disclosure. The upper and lower limits of these smaller ranges may independently be included in the smaller ranges, and are also encompassed within the disclosure, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included in the disclosure.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present disclosure, exemplary methods and materials are now described. All publications mentioned herein are incorporated herein by reference to disclose and describe the methods and/or materials in connection with which the publications are cited.
As used herein and in the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. It is further noted that the claims may be drafted to exclude any optional element. As such, this statement is intended to serve as antecedent basis for use of such exclusive terminology as “solely,” “only” and the like in connection with the recitation of claim elements, or use of a “negative” limitation.
The publications discussed herein are provided solely for their disclosure prior to the filing date of the present application. Nothing herein is to be construed as an admission that the present disclosure is not entitled to antedate such publication by virtue of prior disclosure. Further, the dates of publication provided may be different from the actual publication dates which may need to be independently confirmed.
While the present disclosure has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the true spirit and scope of the disclosure. In addition, many modifications may be made to adapt a particular situation, material, composition of matter, process, process step or steps, to the objective, spirit and scope of the present disclosure. All such modifications are intended to be within the scope of the claims appended hereto.
Referring now to FIG. 1, there is shown a block diagram 10 of a portion of the electronics of a battery-powered electronic device including the power cycling/reset electronics in certain embodiments of the present disclosure. The electronic device may include, but is not limited to, for example, a blood glucose meter, a continuous glucose monitoring device, or an infusion device such as an insulin pump. The electronic device includes a data processor or microprocessor 20, which, in certain embodiments, is provided along with other integrated circuits (not shown) on a printed circuit board (PCB), for performing the device's data processing and/or data communication (i.e., data transmission and reception) functions. The device electronics further include circuitry for providing and regulating the supply of voltage to the various device components including data processor 20. Such circuitry includes a power interface circuit 30 which provides one or more power input lines 50 to data processor 20, and a source of power 40, i.e., one or more replaceable batteries described in greater detail below, positioned between power interface circuit 30 and system ground. Power interface circuit 30 may include a backup battery and/or one or more large capacitors which maintain power to data processor 20 and certain other circuits, e.g., a memory, in case of a loss of primary power 40, such as when the battery is being replaced or expires prior to replacement.
Referring still to FIG. 1, the power reset circuitry in certain embodiments of the present disclosure, which works cooperatively with the power components described above, includes a reset circuit 60 which provides a reset signal to data processor 20 via reset line 80. The power reset circuitry also includes a reset switch 70 positioned between reset circuit 60 and system ground. Reset switch 70, in certain embodiments, is structurally provided by a pair of contacts 110a, 110b which are, as shown in FIGS. 2A-2C, in certain embodiments, positioned side-by-side and marginally spaced apart from a front or distal side or end 106a of a battery contact pad 106, which is schematically represented in FIG. 1 by the negative terminal (or the positive terminal depending on the desired orientation) of battery 40. When a conductor is extended between contact points 110a and 110b, reset switch 70 is closed thereby grounding reset circuit 60 which in turn sends a reset signal via line 80 to data processor 20. Conversely, when the contact points are not electrically connected, reset switch 70 is open with no reset signal being provided by reset circuit 60 to data processor 20.
Referring now to FIGS. 2A-2C, an electronic device 100 is shown having, in certain embodiments, a device housing 102 which encases the device's electronic components, many of which are provided on PCB 104, including the circuitry of FIG. 1 as well as opposing, spaced apart battery receptacle contacts or terminals 106, 108 configured for receiving a replaceable battery therebetween. While a single replaceable battery may be employed as the system's supply voltage, the illustrated device embodiment is configured to operate with a battery pack 120 including a pair of batteries 114 retained within an insulated housing or tray 122, which is shaped and configured to mate in sliding or snap-fit engagement with a distal or receiving end of device housing 102. When fully engaged with each other, the combined housings 102, 122 may provide a hermetically resistant seal about the device. If used, a battery pack, in certain embodiments, includes two replaceable batteries of the same size that are held and positioned in tandem. Although any suitable battery type may be used depending on the subject electronic device, common battery types for providing a long service life, i.e., typically well over a year of continuous use, for small portable or hand-held electronic devices include but are not limited to coin or button cell batteries. In such batteries, the can 118 typically functions as the anode or positive terminal and the cap 116 typically functions as the cathode or negative terminal. Suitable anode materials include but are not limited to zinc and lithium, and suitable cathode materials include but are not limited to manganese dioxide, silver oxide, carbon monofluoride, cupric oxide and oxygen from the air. By way of example, a standard lithium battery, such as the CR2032 battery, which is rated at 3.0 V, can be used in the presently disclosed device. Referring again to FIGS. 2A-2C, each pair of battery receptacle terminals includes a cathode or negative terminal 106 and an anode or positive terminal 108. Each negative terminal 106 is in the form of a conductive pad having a shape corresponding to that of the can 118 of replaceable battery 114, and each positive or anode terminal 108 is in the form of a conductive lead that extends over and is spaced above negative or cathode terminal 106 a distance corresponding to the height or thickness of battery 114. The separation distance between leads 106 and 108 may be slightly less than the height of battery 114 wherein conductive lead 108 may be anchored with a slight spring bias to enable it to bend slightly upward upon receiving the front end of battery 114 and provide a snug fit therewith. When battery pack 120 is fully engaged with device housing 102, batteries 114 are seated between respective battery receptacle terminals 106 and 108, as best shown in FIG. 5B.
Reset contacts 110a, 110b are in the form of conductive pads or vias within PCB 104 where contact 110a is electrically coupled to system ground and contact 110b is electrically coupled to an input of reset circuit 60, as shown in FIG. 1. As best shown in FIG. 2C, the height of reset contacts 110a, 110b extends a distance D1 which is slightly higher than the top surface of battery receptacle terminal 106 and slightly above the battery insertion plane 125 traversed by batteries 114 as tray 122 is operatively coupled with device housing 102. Distance D1, in certain embodiments, may range from about 0.01 mm to 1.0 mm. Further, reset contacts 110a, 110b are laterally spaced a distance D2 from the peripheral leading edge 106a of battery receptacle contact pad 106. In certain embodiments, the reset contacts may be positioned adjacent to battery receptacle contact pad 108 in a similar manner. In either configuration, the separation between the reset contact points and the battery receptacle contact pads insulates them from each other. Distance D2 may range from about 0.01 mm to 10 mm in certain embodiments.
In the power reset circuitry described above with respect to FIG. 1, the relative height of reset contacts 110a, 110b and their structural juxtaposition to the device's battery receptacles collectively provide and enable a power reset cycle of the present disclosure which is implemented each time the batteries 114/battery pack 120 are inserted or removed from device 100. Such power reset cycle is described with reference to FIGS. 3A/3B, 4A/4B and 5A/5B as well as to the graphs of FIGS. 6A and 6B. As shown in FIGS. 3A and 3B, upon commencing insertion of batteries 114 into their corresponding battery receptacles 106, a battery 114 is slid over reset contacts 110a, 110b whereby the bottom or anode surface 118 of the battery physically bridges and electrically shorts the reset contacts. At this first stage of the power reset cycle (commencing at battery position 1), the batteries 114 have yet to contact their respective receptacles. As such, with reference to the voltage graphs of FIGS. 6A and 6B, the reset line 80 input to data processor 20 is set HI while the power line 50 input to data processor 20 is set LO. Midway through battery installation, as shown in FIGS. 4A and 4B, batteries 114 are positioned within their respective battery receptacle such that battery cap or anode 116 engages battery receptacle cathode 106 and battery can or cathode 118 engages battery receptacle anode 108. At this second stage of the power reset cycle (commencing at battery position 2), as shown in FIGS. 6A and 6B, power line 50 input to data processor 20 goes HI while the reset line 80 input to data processor 20 remains HI. As such, certain of the device's electronics are electronically reset. A reset event will initialize the electronic circuit to a known or default state, the nature of the state will depend on the circuit. During this reset stage, the device is powered by replaceable batteries 114 which guarantees that the reset signal is sensed or received by data processor 20 regardless of the state or existence of a backup battery or large powering capacitors. Finally, as battery pack 120 is completely advanced, as shown in FIGS. 5A and 5B, the batteries 114 moves off of reset contacts 110a, 110b and become fully seated within their respective battery receptacles. At this third and final stage of the battery insertion power reset cycle (commencing at battery position 3), as shown in FIGS. 6A and 6B, power line 50 input to data processor 20 remains HI while the reset line 80 input to data processor 20 goes LO. The separation distance D2 between the reset contact points 110a, 110b and the battery receptacle pad 106 ensures that device 100 is not held in a reset mode during normal operation. A multi-stage power reset cycle is also provided upon removal of batteries 114/battery pack 120 from device 100, but with the stages occurring in reverse order from the process just described.
The subject power reset system thus operates by using a single surface or pole of a battery and a pair of reset contact points as an electro-mechanical switch to trigger and cease a power cycling or reset state of the system. In certain embodiments, no additional user action is required to initiate such a reset. Further, in certain embodiments, no additional device housing access ports or switch receptacles are necessary, reducing manufacturing costs and minimizing the risk of liquid or electrostatic discharge (ESD) ingress into the device.
Certain embodiments of the present disclosure may include power cycling an electronic device having a data processor including enabling a reset circuit to provide a reset signal to the data processor, supplying power to the data processor while enabling the reset circuit, disabling the reset circuit while maintaining power to the data processor, enabling the reset circuit while maintaining power to the data processor, and removing power to the data processor while enabling the reset circuit.
In certain embodiments, enabling the reset circuit may include conductively grounding the reset circuit.
In certain embodiments, conductively grounding the reset circuit may include positioning one pole of a battery across two reset contact points.
In certain embodiments, supplying power to the data processor may include positioning the battery between ground and a power circuit of the device.
In certain embodiments, disabling the reset circuit may include removing the battery from the two reset contact points.
Certain embodiments of the present disclosure may include an electronic device including a device housing that encases power cycling electronic components of the electronic device comprising a printed circuit board including a data processor, a power interface circuit that provides at least one power input line to the data processor, a reset circuit that provides a reset signal to the data processor via a reset line, a battery receptacle terminal configured to receive a battery pack including at least one cathode terminal, at least one anode terminal, and at least one reset pad electrically coupled to an input of the reset circuit, and a battery pack including a housing and at least one battery retained in the housing and positioned between at least one battery between the at least one cathode terminal and the at least one anode terminal, the battery configured as the supply voltage of the electronic device, wherein the reset circuit includes a reset switch positioned between the reset circuit and system ground.
In certain embodiments, the data processor may include a microprocessor.
In certain embodiments, separation distance between the at least one cathode terminal and the at least one anode terminal may be less than the thickness of the at least one battery.
In certain embodiments, at least one anode terminal may be anchored with a spring bias that enables a bending of the at least one anode terminal upon receipt of the at least one battery between the at least one cathode terminal and the at least one anode terminal.
In certain embodiments, at least one reset pad may include a first reset pad electrically coupled to device ground and a second reset pad electrically coupled to an input of the reset circuit.
In certain embodiments, a height of the at least one reset pad may be greater than a top surface of the at least one cathode terminal.
In certain embodiments, the height of the at least one reset pad may be in a range of 0.01 mm to 1.0 mm.
In certain embodiments, at least one battery may be a replaceable battery.
In certain embodiments, the battery pack may be configured to engage with the battery receptacle terminal in a sliding or snap-fit manner.
In certain embodiments, at least one reset pad may be laterally spaced from a leading peripheral edge of the at least one cathode terminal.
In certain embodiments, the lateral spacing of the at least one reset pad from the leading peripheral edge of the at least one cathode terminal may be in a range of 0.01 mm to 10 mm.
Certain embodiments of the present disclosure may include power cycling an electronic device having a data processor including receiving, at one or more reset contact, an electrical short from at least one battery, receiving, at one or more data processors, a first voltage input signal from one or more reset lines that is HI, receiving, at the one or more data processors, a second voltage input signal from one or more power lines that is LO, receiving, at the one or more data processors, a third voltage input signal from the one or more power lines that is HI, determining, at the one or more data processors, that the first voltage input signal from the one or more reset lines remains HI, receiving, at the one or more data processors, a fifth voltage input signal from the one or more reset lines that is LO, and determining, at the one or more data processors, that the third voltage input signal from the one or more power lines remains HI.
While the present disclosure has been described with reference to the specific embodiments thereof, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the true spirit and scope of the disclosure. In addition, many modifications may be made to adapt a particular situation, material, composition of matter, process, process step or steps, to the objective, spirit and scope of the present disclosure. All such modifications are intended to be within the scope of the claims appended hereto.

## Claims

1. An electronic device, comprising
a data processor,
a reset circuit;
a power source; and
a memory comprising instruction that:
provides a reset signal to the data processor to initiate a first power reset cycle;
supplies power to the data processor while enabling the reset circuit to initialize the electronic device to a first state; and
disables the reset circuit while maintaining power to the data processor to operate the electronic device and to complete the first power reset cycle;
enables the reset circuit while maintaining power to the data processor to initiate a second power reset cycle;
removes power to the data processor while the reset circuit is enabled to perform the second power reset cycle; and
disables the reset circuit to complete the second power reset cycle.

2. The electronic device of claim 1, wherein the enabling the reset circuit comprises conductively grounding the reset circuit.

3. The electronic device of claim 2, wherein the conductively grounding the reset circuit comprises positioning one pole of a battery across two reset contact points.

4. The electronic device of claim 3, wherein the supplying power to the data processor comprises positioning the battery between ground and a power circuit of the device.

5. The electronic device of claim 4, wherein the disabling the reset circuit includes removing the battery from the two reset contact points.

6. The electronic device of claim 1, wherein the power source comprises a battery receptacle terminal configured to receive a battery pack including at least one cathode terminal and at least one anode terminal, and at least one reset pad electrically coupled to an input of the reset circuit.

7. The electronic device of claim 6, wherein the battery pack comprises a housing and at least one battery retained in the housing and positioned between at least one battery between the at least one cathode terminal and the at least one anode terminal, the battery configured to provide power to as the supply voltage of the electronic device, wherein the insertion of the battery pack into the battery receptacle triggers the reset circuit to initiate the power reset cycle of the electronic device, to initialize the electronic device to a known state, and to complete the initiated power reset cycle.

8. The electronic device of claim 1, wherein the data processor includes a microprocessor.

9. The electronic device of claim 7, wherein a separation distance between the at least one cathode terminal and the at least one anode terminal is less than a thickness of the at least one battery.

10. The electronic device of claim 6, wherein the at least one battery is a replaceable battery.

11. The electronic device of claim 6, wherein the battery pack is configured to engage with the battery receptacle terminal in a sliding or snap-fit manner.

12. The electronic device of claim 1, wherein the reset circuit that provides a reset signal to the data processor via a reset line, the reset circuit including a reset switch comprising at least one reset pad provided on a printed circuit board, the reset circuit configured to initiate a power reset cycle of the electronic device.

13. The electronic device of claim 12, wherein the at least one reset pad includes a first reset pad electrically coupled to device ground and a second reset pad electrically coupled to an input of the reset circuit.

14. The electronic device of claim 12, wherein a height of the at least one reset pad is greater than a top surface of the at least one cathode terminal.

15. The electronic device of claim 12, wherein the height of the at least one reset pad is in a range of 0.01 mm to 1.0 mm.

16. The electronic device of claim 12, wherein the electronic device is an analyte meter.

17. The electronic device of claim 12, wherein the analyte is glucose.