System and method for enumerating a USB device using low power

Details System and method for enumerating a USB device using low power System and method for enumerating a USB device using low power

2006-08-17

2009-11-24

Chen, Alan (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral monitoring

C710S008000, C710S016000, C710S018000, C710S019000, C713S300000, C713S340000

Reexamination Certificate

active

07624202

ABSTRACT:
System and method for enumerating and/or enumerating a device. The device may be a USB portable device which adheres to a first standard, e.g., the USB specification, and may engage in enumeration with respect to a USB hub/USB host device. Where a battery included in the device is sufficiently low, the device may engage in low power enumeration, e.g., to begin charging the device using enumerated power. Low power enumeration may allow the device to enumerate even when the device is incapable of powering on. Additionally, or alternatively, the device may determine whether the hub/host device is capable of providing high power charging. If it is, the device may begin charging the battery of the device using power provided by the hub/host device at a high power level.

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