Patent ID: 7523338
Filing Date: 2009-04-21
Classification: G06F

Abstract:
1. A handheld communication device, wherein said handheld communication device ( 300 ) communicates with a remote universal serial bus (USB) host controller via an integrated power and data port, said handheld communication device comprising: (a) a microprocessor communicating with a power management integrated circuit (IC), wherein said microprocessor requires greater than 100 mA to be enumerated with said USB host controller; (b) a multiplexer communicating with at least said integrated power and data port and said power management integrated circuit (IC); (c) a USB charger IC communicating with said USB host controller via said integrated power and data port; (d) a rechargeable battery communicating with said USB charger IC; and (e) a USB microcontroller communicating with said USB host controller via said multiplexer and integrated power and data port; wherein said USB microcontroller requires less than 100 mA to be enumerated with said USB host controller, wherein, if a current available from said rechargeable battery is below a specified threshold required to power up said microprocessor, then said USB microcontroller performs USB enumeration with said USB host controller.