Power supply controlling apparatus of a device connected to...

Details Power supply controlling apparatus of a device connected to... Power supply controlling apparatus of a device connected to...

2008-01-15

2008-01-15

Perveen, Rehana (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

C713S320000, C713S323000, C713S324000, C713S340000

Reexamination Certificate

active

07320077

ABSTRACT:
The present invention relates to an apparatus and method of a Universal Serial Bus (USB) device to control power supply for USB devices coupled to a host through a USB and to control power supply for the coupled USB devices based on whether the USB devices are operative. A power supply controlling apparatus and method can interrupt power supply for an USB internal circuitry and other coupled USB devices if a state of signals on corresponding data lines coupled to a host represents inoperative state of the host or individual USB to reduce or prevent overall power consumption.

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