POWER SAVE CIRCUIT AND POWER SAVE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a power save circuit and method capable of reducing power consumption by realizing high integration and preventing the malfunction of a clock. SOLUTION: This power save circuit is provided with a program counter 1 for outputting an instruction address at the time of executing an instruction, an instruction memory 2 for storing an instruction code corresponding to the instruction address inputted from the program counter, plural instruction decoders 3-1, 3-2 and 3-N operating in response to the instruction code, plural units 4-1, 4-2 and 4-N operating in response to a signal from each decoder, a save signal generating circuit 7 for transmitting power save signals 8-1, 8-2 and 8-N to the units at the time of executing the instruction, and a register 5 for selecting the unit operating power save at the time of executing the instruction.