| 摘要 |
<p>PURPOSE:To surely turn a microcomputer to a standby mode when a power source is turned off and to prevent useless power consumption. CONSTITUTION:When the detection voltage of a voltage detection circuit 3 becomes equal to or less than the standby setting voltage of the microcomputer 7, under a state where a constant voltage circuit 8 can maintain a prescribed constant voltage, a reset circuit 12 is controlled so as not to let a reset signal supplied to the microcomputer 7 by a reset cancelling circuit 15. Thus, the microcomputer 7 is prevented front not being turned to the standby mode due to the erroneous recognition of the detection voltage of the microcomputer 7 accompanying the repetition of the reset of the reset circuit 12 when the power source is turned off.</p> |
