CPU clock control unit

Details CPU clock control unit CPU clock control unit

1993-12-29

1996-08-13

Kriess, Kevin A.

G06F 108

Patent

active

055465684

ABSTRACT:
The present invention relates to an apparatus and method for controlling a CPU clock in response to certain events with a system in order to conserve power usage. These events can be programmably enabled or disabled. The apparatus comprises a circuit for detecting enabled Stop Clock events requiring the CPU clock to temporarily cease operation. In combination therewith, the present invention includes a circuit for detecting enabled Stop Break events which are used to re-start the CPU clock. The present invention further comprises a Speedup circuitry to increase the CPU clock speed for enabled speedup events which are dependent on CPU clock speed.

REFERENCES:
patent: 4785416 (1988-11-01), Stringer
patent: 4851987 (1989-07-01), Day
patent: 5175853 (1992-12-01), Kardach et al.
patent: 5369771 (1994-11-01), Gettel
patent: 5390350 (1995-02-01), Chung et al.
patent: 5392437 (1995-02-01), Matter et al.
patent: 5428765 (1995-06-01), Moore
patent: 5430881 (1995-07-01), Ikeda

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