Power conservation method and apparatus activated by detecting s

Details Power conservation method and apparatus activated by detecting s Power conservation method and apparatus activated by detecting s

1996-05-20

1999-11-09

Sheikh, Ayaz R.

Electrical computers and digital processing systems: support

Computer power control

Power conservation

713320, G06F 100

Patent

active

059833556

ABSTRACT:
A method and apparatus is disclosed for controlling the application of a clock stopping signal in a processor to limit power consumption. The system controller receives addresses, signals indicative of primary and secondary system activity, and at least one nap timeout signal. Addresses are compared with fixed software interrupt addresses. Matching non-prefetched addresses trigger a nap mode. Upon nap mode triggering, the clock stopping signal may be throttled until a programmable NAP timer expires. Applying the clock stopping signal with programmable duty cycle during the throttling period ensures that processing necessary for the detection and servicing of primary and secondary activity may occur. A prefetch detect circuit ensures that fixed software interrupt addresses loaded in the middle of a prefetch do not trigger the clock stopping signal. The clock stopping signal is removed or inhibited when primary or secondary activity is detected or when a nap mode is terminated by a nap timer timing out.

REFERENCES:
patent: 4851987 (1989-07-01), Day
patent: 5189647 (1993-02-01), Suzuki et al.
patent: 5218704 (1993-06-01), Watts, Jr. et al.
patent: 5222239 (1993-06-01), Rosch
patent: 5237692 (1993-08-01), Raasch et al.
patent: 5239652 (1993-08-01), Seibert et al.
patent: 5317752 (1994-05-01), Jewett et al.
patent: 5377336 (1994-12-01), Eickmeyer et al.
patent: 5386552 (1995-01-01), Garney
patent: 5392435 (1995-02-01), Masui et al.
patent: 5396635 (1995-03-01), Fung
patent: 5404546 (1995-04-01), Stewart
patent: 5410714 (1995-04-01), Yorimoto et al.
patent: 5414860 (1995-05-01), Canova, Jr. et al.
patent: 5475848 (1995-12-01), Ikeda
patent: 5511203 (1996-04-01), Wisor et al.
patent: 5546037 (1996-08-01), Kenny et al.
patent: 5546568 (1996-08-01), Bland et al.
patent: 5548763 (1996-08-01), Combs et al.
patent: 5560017 (1996-09-01), Barrett et al.
patent: 5560024 (1996-09-01), Harper et al.
patent: 5590342 (1996-12-01), Marisetty
Pico.linevert split.Power A Cirrus Logic Division, VESUVIUS-LS, Pentium Processor PCI System Controller, Preliminary Data Book, Version 0.7, Sep. 1995.
"Pico Power VESIVOIS-LS Preliminary Data Book", National Semiconductor, version 1.0, pp. ii-xii, 1-32-1-34,1-60-1-77,1-130-1-210,3-320-3-343, Mar. 1996.
Cirrus Logic, Inc., VESUVIUS-LS Advanced Data Book Version 0.6; 3/95; pp. 54-67.
Shanley and Anderson; ISA System Architecture; pp. 331-366; MindShare, Inc.; 1991 and 1993.

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