Patent ID: 8010721
Filing Date: 2011-08-30
Classification: G06F

Abstract:
1. A universal serial bus (USB) device, comprising: a USB interface; a storage unit comprising driving programs of the USB device stored therein; a microprocessor unit comprising function programs of the USB device stored therein, wherein when the USB device is connected to a computer via the USB interface, the storage unit transfers the driving programs to the computer to be installed, and the microprocessor unit executes the function programs of the USB device to allow the USB device to communicate with the computer; and a voltage converting unit to convert a voltage output from the USB interface of the USB device to provide to the microprocessor unit and the storage unit; wherein the microprocessor unit comprises a control chip, a first resistor, and a first capacitor, a power pin of the USB interface is connected to a detect pin of the control chip, data pins of the USB interface are correspondingly connected to data pins of the control chip, a voltage pin and a power pin of the control chip are connected to a voltage output from the voltage converting unit, a reset pin of the control chip is connected to the voltage output from the voltage converting unit via the first resistor and grounded via the first capacitor, input/output pins of the control chip are connected to the storage unit.