JPH0334143U

JPH0334143U -

Info

Publication number: JPH0334143U
Application number: JP9234689U
Authority: JP
Priority date: 1989-08-04
Filing date: 1989-08-04
Publication date: 1991-04-03

Description

[Brief explanation of drawings]

第１図は本考案のリセツト回路を示す回路図、
第２図は第１図の各部波形を示すタイミングチヤ
ートである。２，６……抵抗、３……第１のコンデンサ、４
……リセツト制御回路、５……マイクロコンピユ
ータ、７……第２のコンデンサ、８，９……トラ
ンジスタ。 FIG. 1 is a circuit diagram showing the reset circuit of the present invention.
FIG. 2 is a timing chart showing waveforms of various parts of FIG. 1. 2, 6...Resistor, 3...First capacitor, 4
...Reset control circuit, 5...Microcomputer, 7...Second capacitor, 8, 9...Transistor.

Claims

[Claims for Utility Model Registration] A first integrating circuit that includes a first capacitor and integrates a power supply voltage, and generates a reset release signal when the integrated output of the first integrating circuit is equal to or higher than a first level. a microcomputer that is reset by the reset release signal and outputs a pulse signal of a constant period when the reset is released and operates normally; and a second capacitor, a second integrating circuit that integrates the output; a first discharging circuit that discharges the charge stored in the first capacitor when the integrated output of the second integrating circuit is equal to or higher than a second level; a second discharging circuit that discharges the charge stored in the second capacitor when the pulse signal is output, and when the pulse signal of a certain period is no longer output from the microcomputer, the microcomputer The reset circuit is characterized in that the microcomputer is intermittently reset by the output of the reset control circuit until the pulse signal of a constant period is output from the computer.