| 摘要 |
The present invention provides a semiconductor device that achieves high speed and low power consumption and can be used in a real-time system by preventing the held data from disappearing at the time of power shutdown and turning power on sharply while preventing a through-current at the time of power resumption. During normal operation, the switch is on, and the clock generating circuit and the data holding circuit are operated with the first power supply voltage, and when data holding is required at the time of power shutdown, the switch is turned off, and the clock generating circuit and the data holding circuit are operated with the second power supply voltage, and the first power supply voltage supplied to the logic circuit is shut down.
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