Multiprocessor system with reduced power mode and improved varia

Details Multiprocessor system with reduced power mode and improved varia Multiprocessor system with reduced power mode and improved varia

1996-01-26

1998-03-03

Ray, Gopal C.

Boots, shoes, and leggings

364707, 364492, G06F 132, G06F 126

Patent

active

057245916

ABSTRACT:
A multiprocessor system is provided with processor units which are grouped beforehand into some groups, a system status monitoring unit for monitoring a key input operation of a keyboard, a power demand monitoring unit for calculating the difference between the total power demand of the processor units at the present time and the total power demand of the processor units in a low power-demand mode which is measured beforehand, when the key input operation is not carried out in a normal operation mode for a predetermined time, and an operation clock controller for successively reducing or stopping operation clocks supplied to the respective processor units for each group in turn to shift the current mode to the low power-demand mode. With this construction, a power variation which occurs at the time of the switching operation between the normal operation mode and the low power-demand mode or at the time of power supply/power shut-off can be reduced.

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"Standards for reduction of power demand effects the design of computer"; Nikkei Electronics, No. 590, Sep. 13, 1993 pp. 103-134.

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