| 摘要 |
A microcomputer in which an oscillating circuit provided therein is activated both when the microcomputer is in an activated state and when it is in a disabled state is provided with a changeover circuit for changing over a supply voltage of the oscillating circuit between when the microcomputer is in the activated state and in the disabled state. The changeover circuit supplies to the oscillating circuit a high voltage when the microcomputer is in the activated state and a low voltage when the microcomputer is in the disabled state. As a result, the starting characteristic when the power is turned on is not deteriorated. Further, the power consumption of the oscillating circuit when the microcomputer is in the disabled state is reduced.
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