Power conversation for devices on a shared bus using bus...

Details Power conversation for devices on a shared bus using bus... Power conversation for devices on a shared bus using bus...

2005-09-28

2010-10-19

Bae, Ji H (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

By external command

C713S300000, C713S323000, C710S100000

Reexamination Certificate

active

07818593

ABSTRACT:
A method of operating a shared bus comprises sending a wake-up signal on the shared bus. The wake-up signal comprises a sequence of signals, each signal of the sequence being one of a signal indicating the bus is free and a signal indicating the bus is busy. A microcontroller to effect this method is also contemplated. A wake-up device for a shared bus has a first latch to recognize a signal indicating one of said shared bus being free and said shared bus being busy and selectively output a recognition signal and a second latch to, after receipt of the recognition signal, recognize a signal indicating another of the shared bus being free and the shared bus being busy and selectively output a power-on signal. The latches may be D-type flip flops.

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