| 摘要 |
<p>PURPOSE:To prevent malfunction at the time of turning on a power supply by connecting switching circuits which enter a closed-circuit state after a microcomputer enters a stable operation area, between resistances connected to input and output terminals of the microcomputer and a power source. CONSTITUTION:This controller is equipped with the switching circuits 7 and 8 between the resistances 5 and 6 connected to the input and output terminals 2 - 4 of the microcomputer 1 and the power source V1. The input and output terminals 2 - 4 have high impedance until the power source of the microcomputer 1 is turned ON and settles, so the switching circuits is open. The switching circuit 8 is therefore open as well and no current flows to a load 9. After the voltage settles, the switching device 7 is energized through the operation of the input and output terminal 4. Thus, a current is supplied to neither of the resistances 5 and 6 when the power source is turned to prevent the load from malfunctioning.</p> |
