Microprocessor including controller for reduced power consumption and method therefor
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Aug 3, 1998
filing date -
Aug 3, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A microprocessor for a portable computer, for reducing power consumption, includes a plurality of microcode units, the microcode units for outputting control signals, for each of a plurality of instructions, requires by the microprocessor for executing the instructions. A unit is provided for maintaining selected control signals to values the same as in an immediately previous instruction cycles. Further, there is a unit for passing a control variable to one of the microcode units. Power conservation is provided during the decoding of instructions by the microcode unit by maintaining control signals during the execution of an instruction at the values/levels determined during the decode of a preceding instruction if it is not necessary to change the level of the control signals to execute the instruction.
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