| 摘要 |
Disclosed is a power control circuit utilizable in an electronic device. The power control circuit includes a power on/off switch having first and second switches; a capacitive element connected to a power section via the first switch; a first switching element connected to the power section via the second switch; a microcomputer for controlling power on/off of the first switching element; and a second switching element provided between the power section and each of the microcomputer and a predetermined circuit block. The microcomputer is programmed to control the power control circuit such that, when supplying power to the microcomputer, the microcomputer holds a power-on state of the first switching element before the first switching element is turned off because of the discharge of the electric charge, and then, when the microcomputer detects that the predetermined circuit block has not operated for a given period of time, the microcomputer turns off the first switching element.
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