| 摘要 |
PURPOSE: A semiconductor integrated circuit device is provided to reduce a consumption power by preventing an unnecessary power consumption of a plurality of input circuits. CONSTITUTION: A semiconductor integrated circuit device comprises a power down generating circuit(38), a clock generating circuit(36), a chip select circuit(40), and input circuit(44). The power down generating circuit(38) generates a power down control signal on the basis of a signal for directing a power down, and the clock generating circuit(36) generates an internal clock in response to an external clock(CLK), and is disabled according to the power down control signal from the power down generating circuit(38). The chip select circuit(40) generates an input enable signal in response to an external chip select signal(/CS), and is disabled according to the power down control signal from the power down generating circuit(38). The input circuit(44) operates responsive to the input enable signal and the power down control signal, and receives an input signal in synchronization with the internal clock. The input circuit(44) is disabled by the input enable signal in a period where the power down control signal directs a power on.
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