| 摘要 |
<p>PURPOSE:To realize the application and the disconnection of a power source by a time, by providing a timer, a calendar update means, and a power source control means in a system power control unit constituted of a one-chip microcomputer. CONSTITUTION:The system power control unit 12' constituted of the one-chip microcomputer is provided independently from a main CPU 11, and the timer, the calendar update means, and the power source control means are provided in the unit 12'. And at the time of disconnecting the power source, disconnection information is issued to the CPU 11,and a power disconnection instruction is supplied to a power source 14 after response is received, and the ON/OFF of a timer power is performed by using the calendar update means.</p> |
