KR930020252A

KR930020252A - Micom's reset malfunction prevention device

Info

Publication number: KR930020252A
Application number: KR1019920005015A
Authority: KR
Inventors: 조수덕
Original assignee: 이헌조; 주식회사 금성사
Priority date: 1992-03-26
Filing date: 1992-03-26
Publication date: 1993-10-19

Abstract

본 발명은 마이콤의 오동작을 방지하기 위한 것으로, 자체의 메인 프로그램에 의해 구형파가 출력되도록 하는 마이콤과, 상기 마이콤의 리셋단자에 리셋신호를 인가하는 리셋회로와, 상기 마이콤의 구형파 출력을 인가받아 적분된 아날로그 신호로 변환하는 디지탈/아날로그 변환기와, 상기 디지탈/아날로그 변환기의 출력신호를 인가받아 그 신호가 소정의 기준전압의 범위에 존재하는 지의 여부를 판별하여 그에 따르는 출력을 상기 마이콤의 리셋 오동작 방지장치이다.The present invention is to prevent the malfunction of the microcomputer, the microcomputer to output the square wave by its main program, the reset circuit for applying a reset signal to the reset terminal of the microcomputer, and the square wave output of the microcomputer to receive the integral A digital / analog converter for converting an analog signal and an output signal of the digital / analog converter are determined to determine whether the signal is within a predetermined reference voltage range, and to prevent the microcom reset from malfunctioning. Device.

Description

Micom's reset malfunction prevention device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명 마이콤의 리셋 오동작 방지장치 블록도.2 is a block diagram of the reset malfunction prevention apparatus of the present invention.

제3도는 본 발명 마이콤 구형파 출력의 발생과정을 나타낸 흐름도.Figure 3 is a flow chart showing the generation process of the present invention microcomputer square wave output.

제4도는 본 발명의 비교회로 실시예의 회로도.4 is a circuit diagram of a comparative circuit embodiment of the present invention.

Claims

A microcomputer for outputting a square wave by its main program, a digital / analog converter for converting the square wave output of the microcomputer into an integrated analog signal, and an output signal of the digital / analog converter for receiving the predetermined signal. And a comparison circuit for determining whether or not the voltage is within the reference voltage range and applying the corresponding output to the reset terminal of the microcomputer.

2. The comparison circuit of claim 1, wherein the comparison circuit includes a first comparator to which an input voltage is applied to an inverting input terminal and an upper reference voltage is applied to the non-inverting input terminal, and an input voltage is applied to the non-inverting input terminal and is lower to the inverting input terminal. A second comparator to which a reference voltage is applied, and split resistors for setting a reference voltage range, wherein the first and second comparators are operated by a single power supply, and a common connection point of the output terminals of the comparator Micom reset malfunction prevention device characterized in that the output voltage is output at the same time as being connected to another power supply of the same size.

※ Note: The disclosure is based on the initial application.