Patent ID: 8022753

Claim:
A semiconductor integrated circuit that carries out intermittent operation, the semiconductor integrated circuit comprising: a processor block; a logical operation block other than a processor; a first switch part configured to supply a normal operation voltage to the logical operation block other than a processor; a second switch part configured to supply the normal operation voltage to the processor block; a third switch part configured to supply a data holding voltage lower than the normal operation voltage to the processor block; and a fourth switch part configured to be turned on, when the second switch part is turned off and the third switch part is turned on, and supply the data holding voltage to the processor block, wherein the fourth switch part generates the data holding voltage by using a voltage drop, the second switch part is connected to a first power supply wire that supplies the normal operation voltage, and the third and fourth switch parts are serially connected, and are connected to a second power supply wire that supplies a voltage lower than the normal operation voltage and higher than the data holding voltage.