KR920004181A - Program memory fetch circuit and its error checking method - Google Patents

Program memory fetch circuit and its error checking method Download PDF

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Publication number
KR920004181A
KR920004181A KR1019900011960A KR900011960A KR920004181A KR 920004181 A KR920004181 A KR 920004181A KR 1019900011960 A KR1019900011960 A KR 1019900011960A KR 900011960 A KR900011960 A KR 900011960A KR 920004181 A KR920004181 A KR 920004181A
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KR
South Korea
Prior art keywords
buzzer
input
program memory
processing unit
central processing
Prior art date
Application number
KR1019900011960A
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Korean (ko)
Inventor
심우정
Original Assignee
정용문
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 정용문, 삼성전자 주식회사 filed Critical 정용문
Priority to KR1019900011960A priority Critical patent/KR920004181A/en
Publication of KR920004181A publication Critical patent/KR920004181A/en

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Abstract

내용 없음No content

Description

프로그램 메모리 페치(Fetch)회로와 그의 이상유무 체크방법Program memory fetch circuit and its error checking method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제 1 도는 일반적인 전자식 타자기의 시스템 구성도.1 is a system configuration diagram of a general electronic typewriter.

제 4 도는 이 발명에 따른 프로그램 메모리 페치회로도.4 is a program memory fetch circuit diagram in accordance with the present invention.

제 5 도는 이 발명에 따른 프로그램 메모리 페치회로의 이상유무 체크방법의 일실시예를 나타낸 흐름도이다.5 is a flowchart illustrating an embodiment of a method for checking for an abnormality of a program memory fetch circuit according to the present invention.

Claims (2)

회로동작의 초기화를 수행하는 리셋회로(10)와, 상기 리셋회로에 연결된 중앙처리장치(CPU)와, 상기 중앙처리장치에 연결된 메모리 소자인 ROM과, 상기 중앙처리장치에 연결된 메모리 소자인 RAM과, 상기 중앙처리장치에 연결되어 입.출력 가능을 수행하는 입.출력장치(20)와, 상기 중앙처리장치에 연결된 입.출력 구동기(30)와, 상기 입.출력 구동기에 연결된 부하(40)를 포함하여 구성되는 전자식 타자기에 있어서, 상기 중앙처리장치의 포트(P2)에 연결되어 회로 이상시 동작되는 부져구동기(50)와; 상기 부져구동기(50)에 연결되어 상기 부져구동기(50)의 신호를 받아 구동하는 부져(60)와; 를 더 포함시킨 프로그램 메모리 페치회로.A reset circuit 10 for initializing the circuit operation, a central processing unit (CPU) connected to the reset circuit, a ROM as a memory element connected to the central processing unit, a RAM as a memory element connected to the central processing unit, An input / output device 20 connected to the central processing unit to perform input / output capability, an input / output driver 30 connected to the central processing unit, and a load 40 connected to the input / output driver. An electronic typewriter comprising: a buzzer driver (50) connected to a port (P2) of the central processing unit and operated when a circuit error occurs; A buzzer (60) connected to the buzzer driver (50) and driven to receive a signal from the buzzer driver (50); The program memory fetch circuit further includes. 시스템에 전원을 공급하는 스타트 스텝(S1)을 수행하고, 상기 스타트 스텝(S1) 수행 후, 프로그램 메모리 페치회로가 정상인가를 검사하는 프로그램 메모리 페치회로 검사스템(S2)을 수행하며, 상기 프로그램 메모리 페치회로 검사스템(S2) 수행 후, 이상이 없을 경우 잠시동안 부져를 울리는 부져"온" 스템(S3)을 수행하고, 상기 프로그램 메모리 페치회로가 정상이 아닌경우 전원이 오프될때까지 부져를 울리는 회로이상시 부져 "온" 스텝(S4)을 수행하며, 상기 부져 "온"스텝(S3) 수행 후, 잠시동안의 시간경과후 부져를 멈추는 부져 "오프" 스텝(S5)을 수행하고, 상기 부져 "오프" 스텝(S5) 수행 후, 입.출력장치의 칩을 인에이블 상태로 하는 입.출력 장치 인에이블 스텝(S6)을 수행하며, 상기 입.출력 장치 인에이블 스텝(S6) 수행 후 시스템을 초기화시키는 시스템 초기화 스텝(S7)을 수행하고, 상기 시스템 초기화 스텝(S7)수행 후 원하는 프로그램을 실행시키기 위한 키를 선택하여 입력시키고 이를처리시키는 스텝(S8),(S9),(S10)으로 이루어진 키 처리루틴(L1)을 순차적으로 수행하는 것을 특징으로 하는 프로그램 메모리 페치회로의 이상유무 체크방법.Perform a start step S1 for supplying power to the system, and after performing the start step S1, perform a program memory fetch circuit check system S2 for checking whether a program memory fetch circuit is normal, and perform the program memory After performing the fetch circuit inspection system (S2), if there is no abnormality, a buzzer “on” stem (S3) is executed for a while, and if the program memory fetch circuit is not normal, the buzzer rings until the power is turned off. In case of abnormality, the buzzer “on” step S4 is performed, and after the buzzer “on” step S3 is performed, the buzzer “off” step S5 is performed to stop the buzzer after a short time elapses, and the buzzer “ After performing the " off " step (S5), an input / output device enable step (S6) for enabling a chip of the input / output device is enabled, and the system is performed after the input / output device enable step (S6). Initialization system A key processing routine consisting of steps S8, S9 and S10 for performing a vaporization step S7 and selecting and inputting a key for executing a desired program after performing the system initialization step S7. A method for checking whether there is an error in a program memory fetch circuit, characterized by sequentially performing (L1). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900011960A 1990-08-03 1990-08-03 Program memory fetch circuit and its error checking method KR920004181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900011960A KR920004181A (en) 1990-08-03 1990-08-03 Program memory fetch circuit and its error checking method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900011960A KR920004181A (en) 1990-08-03 1990-08-03 Program memory fetch circuit and its error checking method

Publications (1)

Publication Number Publication Date
KR920004181A true KR920004181A (en) 1992-03-27

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KR1019900011960A KR920004181A (en) 1990-08-03 1990-08-03 Program memory fetch circuit and its error checking method

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KR (1) KR920004181A (en)

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