| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit with low power consumption at high speed. SOLUTION: The semiconductor integrated circuit includes an arithmetic circuit (EXA) including registers, the registers maintaining their states even in a sleep state. Further, the semiconductor integrated circuit includes: logic gates connected to the registers; and a control circuit connected to the logic gates, each logic gate includes a first conduction type first MOS transistor and a second conduction type second MOS transistor connected in series, and a connecting point between them is used for an output node. The control circuit is connected to either of the MOS transistors, receives a control signal, allows a first current to flow through one source of the MOS transistors depending on a first state of the control signal, and limits a sub threshold current flowing through the one source of the MOS transistors to a value smaller than the first current according to a second state of the control signal. The semiconductor integrated circuit resumes an arithmetic operation stopped halfway when an active state is restored after the sleep state takes place. COPYRIGHT: (C)2004,JPO&NCIPI
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