Patent ID: 7663338
Filing Date: 2010-02-16
Classification: G06F,H02J

Abstract:
1. A mobile device, comprising: a universal serial bus (USB) interface configured to be connectable to a USB host; a processing device operable to execute programs and to control operation of the mobile device, the processing device being further operable to receive an enumeration acknowledgement signal via the USB interface and generate an enable signal upon receiving the enumeration acknowledgement signal; a rechargeable battery for powering the processing device; a battery charger operable to receive a USB bus voltage from the USB interface and use the USB bus voltage to power the processing device and to charge the rechargeable battery, the battery charger being further operable to receive a charge enable signal that enables and disables the battery charger from powering the processing device and charging the rechargeable battery; a timing circuit operable to detect the USB bus voltage and to measure the passage of a pre-determined amount of time upon detecting the USB bus voltage; and a battery charger enabling circuit operable to generate the charge enable signal to control the battery charger, the battery charger enabling circuit enabling the battery charger until the timer has measured the passage of the pre-determined amount of time or the enable signal is received from the processing device.