Apparatus of controlling supply of device drive clocks

Details Apparatus of controlling supply of device drive clocks Apparatus of controlling supply of device drive clocks

2006-02-21

2006-02-21

Cao, Chun (Department: 2115)

Electrical computers and digital processing systems: support

Clock control of data processing system, component, or data...

C713S500000

Reexamination Certificate

active

07003685

ABSTRACT:
The present invention relates to an apparatus of controlling supply of device drive clocks to supply device drive clocks individually to only operative devices among all devices connected to a data bus in a computer. The present apparatus consists of a clock generator generating a reference clock; a clock provider producing the device drive clocks, which are requisite for operations of a plurality of devices connected to a data bus, using the reference clock, and supplying the produced device drive clocks individually to the plurality of devices; and a controller monitoring operation states of the plurality of devices, and controlling the individual clock supply of said clock provider based on each monitored operation state. Owing to the present invention, the device drive clocks are not supplied to the operation-suspended devices, thereby reducing unnecessary power consumption in a portable computer.

REFERENCES:
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patent: 6021516 (2000-02-01), Okajima et al.
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patent: 6295566 (2001-09-01), Stufflebeam
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Andrew Tanenbaum, Structured Computer Organization, 1984, Prentice Hall, Second edition, pp. 10-12.

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