Patent ID: 9201827
Filing Date: 2015-12-01
Classification: G06F,Y02D

Abstract:
1. A method for use in a portable communication device, the method comprising: establishing, by the portable communication device, a non-USB connection for communication with an accessory using a first set of pins and using a non-USB protocol; determining, by the portable communication device, whether a mode-selecting command is received from the accessory via the non-USB connection, wherein the mode-selecting command includes a command code and a parameter specifying whether the portable communication device is to operate in a first mode or a second mode of an asymmetric communication protocol; and in the event that the mode-selecting command is received from the accessory, initializing, by the portable communication device, a connection on a second set of pins for communication with the accessory in the mode of the asymmetric communication protocol indicated by the received mode-selecting command, wherein the non-USB protocol is a device-specific protocol, the method further comprising: initiating an authentication operation with the accessory using the second set of pins according to the device-specific protocol; determining whether the authentication operation is successful; and in the event that the authentication operation is not successful, blocking the accessory from using at least one function associated with the asymmetric communication protocol.