| 摘要 |
<p>PURPOSE:To constitute a system where the time of power-off is reflected on software as the elapsed time. CONSTITUTION:A CPU 1 reads out the present time or the like from a calendar clock 5 as data through an interface 4 by execution of a program in a program memory 2. A timer interrupt 12 is outputted from the calendar clock 5 to the CPU 1, and the calendar clock requests an interrupt to the CPU 1 at intervals of a certain time. A backup power source 6 performs the backup operation through a backup power line 10 even if the power source of the system is turned off. The processing result is displayed as a graphic moving picture through a display interface 7.</p> |
