| 摘要 |
<p>PURPOSE:To suppress the consumption of a battery by making a flip-flop into a setting condition by a key operation, lasting an integrating action and surely transiting a microcomputer from a stand-by condition to an action condition. CONSTITUTION:When a microcomputer 1 is in the stand-by condition and either of keys in a key matrix 2 is operated, the key input is performed from the key matrix 2, a flip-flop 9 is set, and an integrating circuit 10 starts to integrate the output of an output terminal Q. When the integrating voltage exceeds a threshold voltage V1, the microcomputer 1 starts the clock oscillation of a clock transmitter 7, and when the voltage further exceeds a threshold voltage V2, the microcomputer 1 is transited from the standby condition to the program operation condition. Then, when a key is depressed during some time, to enter the abnormal condition of the clock oscillation only is eliminated, and the worry that the battery is dead even for equipment operated by the battery is eliminated.</p> |
