| 摘要 |
A power-ON-clear circuit has a reset period when the power supply stops temporarily (or instantaneously) and then that power supply is restored. The power-ON-clear circuit 30 of a semiconductor integrated circuit 200 comprises: a capacitor C 31 of which one end is connected to the external power-supply voltage Vcc 1 ; an N-channel MOS transistor Q 31 of which the drain is connected to the other end of the capacitor C 31 , the source is connected to the ground potential, and the gate is connected to the external power-supply voltage by way of a resistor R 31 ; and an inverter INV 31 that is connected to the connecting point between the capacitor C 31 and MOS transistor Q 31 in a stage connection, and is connected to the power supply between the internal power-supply voltage Vcc 2 and the ground potential.
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