| 摘要 |
<p>PURPOSE:To realize the necessary processes after break of the power supply and without discontinuing the operation of the arithmetic processor in case the power source has a value lower than the fixed voltage level, by resetting assuredly the arithmetic processor when the power source is switched on. CONSTITUTION:The fact that the voltage applied to the DC stabilizing circuit 2 has turned to the 1st and 2nd voltages are detected by the 1st and 2nd detecting circuits 3 and 4 each. The initial resetting is carried out for the CPU9 by the output of the circuit 4. At the same time, the interruption signal is applied to the CPU9, and then the program start signal is led out after a fixed time to stop the operation of the oscillating circuit 12. Thus the CPU9 is cancelled for its reset state. When the voltage of the circuit 2 falls down to the 2nd voltage, the discontinuation of the CPU9 is avoided by the flip-flop 6. And immediately the shunting process is carried out by the memory 10 and the printer 11, etc.</p> |
