Title:
SYSTEM, APPARATUS, AND METHOD FOR FAST STARTUP OF USB DEVICES
Document Type and Number:
WIPO Patent Application WO/2010/083257
Kind Code:
A3
Abstract:
Exemplary embodiments are directed to fast enumeration of a device in a USB system including a USB device and a USB host. The USB device includes two device descriptors, a memory for holding firmware for operation of the USB device, and a controller for executing the firmware. A first device descriptor is for enumerating the USB device in a firmware-loading mode and a second device descriptor is for enumerating the USB device in an operational mode. The USB host controls a first enumeration of the USB device using the first device descriptor. After the first enumeration, the USB host receives a re-enumerate indicator from the USB device and controls a second enumeration of the USB device using the second device descriptor.
Inventors:
HARRIS STEVEN F (US)
Application Number:
PCT/US2010/020949
Publication Date:
September 23, 2010
Filing Date:
January 13, 2010
Export Citation:
Assignee:
QUALCOMM INC (US)
HARRIS STEVEN F (US)
HARRIS STEVEN F (US)
International Classes:
G06F9/445
Domestic Patent References:
| WO2004008313A1 | 2004-01-22 |
Foreign References:
| US20030046447A1 | 2003-03-06 | |||
| US20070228139A1 | 2007-10-04 |
Attorney, Agent or Firm:
MOBARHAN, Ramin (5775 Morehouse DriveSan Diego, CA, US)
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