| 摘要 |
<p>PURPOSE:To reduce a burden on a program concerning a timer function by providing the counting-up circuit of a timer and a means to process and control the value of the counting-up circuit according to the program. CONSTITUTION:A timer 20 counts down the clock of 32.768kHz to 1/32768, and the output is imparted to a timer counting-up circuit 21. The timer couting-up circuit 21 is composed of a second counting-up part 21a, minute counting-up part 21b, hour counting-up part 21c and day counting-up part 21d. A control circuit 22 to start or reset the counting-up operation is connected to the timer counting-up circuit 21, and the control circuit 22 is connected through a bus 4 to a CPU 1. An interruption signal is impressed from the timer 20 through an interruption control circuit 28 to the CPU 1 and corresponding to this signal, the CPU 1 displays the numerical value of the timer counting-up circuit 21 at a display part.</p> |
