Supplying power from peripheral to host via USB

Details Supplying power from peripheral to host via USB Supplying power from peripheral to host via USB

2005-05-24

2008-11-04

Cao, Chun (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

C710S303000

Reexamination Certificate

active

07447922

ABSTRACT:
A method and system is provided for supplying power to a host via a USB port. The power is transmitted to the host using the standard VBUS and GND lines that are part of standard USB cables and connectors. The peripheral device includes a special USB descriptor block. During the standard enumeration process, the host reads this USB descriptor block and recognizes that the device can provide power to the host. A set feature command is used to start the power transmission to the host.

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USB Promoters Group, Universal Serial Bus specification, Revision 2.0, Apr. 27, 2000, pp. 1-650.

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