Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1995-06-05
1997-06-10
Schoop. Jr., William M.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307116, 364273, 3642731, 3642732, 3642733, 3642734, 3642735, 364707, 365229, H01H 4300
Patent
active
056379323
ABSTRACT:
A power consumption control apparatus for an information processing apparatus having multi-tasking control which executes a plurality of information processing operations in parallel by time-divisionally switching a plurality of tasks in an arithmetic processing unit. The power consumption controlled apparatus detects an event where there are no information processing operations to be executed, sets the arithmetic processing unit to a power-saving mode in response to the event and immediately clears the power-saving mode set in the arithmetic processing unit in response to an interrupt signal from an input/output device. Alternatively, the power consumption control apparatus after detecting the event stops supply of a clock to the arithmetic processing unit or lowers a frequency of the clock in response to the event. Thereafter, the power consumption control apparatus immediately resumes supply of the clock to the arithmetic processing unit or raises the frequency of the clock in response to an interrupt signal from an input/output device.
REFERENCES:
patent: 4481440 (1984-11-01), Yonezu et al.
patent: 5189647 (1993-02-01), Suzuki et al.
patent: 5222239 (1993-06-01), Rosch
Koreeda Hiroyuki
Kuwabara Tadashi
Nakane Keiichi
Nonaka Naomichi
Taniguchi Shigeki
Hitachi , Ltd.
Paladini Albert W.
Schoop. Jr. William M.
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