Microprocessor including microcode unit that only changes the value of control signals required for the current cycle operation for reduced power consumption and method therefor
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United States of America Patent
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Sep 19, 2006
Grant Date -
Jul 26, 2001
app pub date -
Mar 14, 2001
filing date -
Aug 3, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A microprocessor, method and signal-bearing medium for storing a program for executing the method, includes a microcode unit for outputting control signals, for each of a plurality of instructions, required by the microprocessor for executing the instructions. The microcode unit includes an instruction address input for receiving an instruction address, a control variable input for receiving a control variable corresponding to a current state of the microprocessor, a control signal input for receiving all of the control signals output by the microcode unit for an immediately preceding instruction, and a plurality of embedded logic circuits each dedicated for evaluating one unique type of instruction received by the microcode unit.
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