| 摘要 |
<p>When each timer is separately provided, a total electric current consumption becomes big. An RTC2 is used for a timer. An imaginary time of "0:00, 11 January, 2000" is stored at a register of the RTC2. Concretely, an imaginary time of "0:30, 11 January, 2000" arriving after "0:00, 11 January, 2000" is stored at a register of the RTC2. "1" is set in an enable bit of an alarm in the RTC2. An interruption at every 21-day period is set at a constant period interruption bit of the RTC2.</p> |
