| 摘要 |
<p>PROBLEM TO BE SOLVED: To shorten work time for recognizing an operation at the time of manufacturing an electronic unit by detecting the level change of an operation signal, which is generated by means of the operation of a power key, and executing power-on control. SOLUTION: When a battery 12 is connected to a power connection terminal 11, CPU 6 becomes an operation state and the input port of CPU 6, which corresponds to the power key 9, becomes a high level. Since a control signal is not supplied from CPU 6 in such state, power voltage is not supplied to respective circuit parts except, for CPU 6. When the power key 9 is depressed, the input port of CPU 6 corresponding to the power key 9 changes to a low level from the high level and a power control signal is correspondingly supplied from CPU 6 to a power switch 10. The power switch 10 is turned off and power voltage is supplied from the battery 12 to the respective circuit parts through the power switch 10 and power is turned on. When an operation key is operated, the corresponding circuit operates.</p> |
