KR850005113A - 4-wire keyboard communication method - Google Patents

4-wire keyboard communication method Download PDF

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Publication number
KR850005113A
KR850005113A KR1019830006383A KR830006383A KR850005113A KR 850005113 A KR850005113 A KR 850005113A KR 1019830006383 A KR1019830006383 A KR 1019830006383A KR 830006383 A KR830006383 A KR 830006383A KR 850005113 A KR850005113 A KR 850005113A
Authority
KR
South Korea
Prior art keywords
keyboard
terminal
communication method
line
logic board
Prior art date
Application number
KR1019830006383A
Other languages
Korean (ko)
Inventor
최병구
Original Assignee
허신구
주식회사 금성사
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.)
Filing date
Publication date
Application filed by 허신구, 주식회사 금성사 filed Critical 허신구
Priority to KR1019830006383A priority Critical patent/KR850005113A/en
Publication of KR850005113A publication Critical patent/KR850005113A/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units

Abstract

내용 없음No content

Description

4선에 의한 키보드 통신방식4-wire keyboard communication method

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

제1도는 본 발명의 4선에 의한 키보드통신방식의 회로.1 is a circuit of the keyboard communication system according to the four wires of the present invention.

제2도는 제1도의 키보드 제어신호에 따른 로직보드의 인에이블 상태도.2 is an enabled state diagram of a logic board according to the keyboard control signal of FIG.

* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

1:공통선, 2:제어선, 3:전원공급선, 4:접지선, 10:로직보드, 20:키보드, 11′,11″,21′,21″:오픈콜랙터, 12:지연반전회로.1: Common line, 2: Control line, 3: Power supply line, 4: Ground line, 10: Logic board, 20: Keyboard, 11 ', 11 ", 21', 21": Open collector, 12: Delayed reverse circuit.

Claims (1)

키보트(20)와 로직보드(10)와의 사이에 데이타를 전송하는 통신방식에 있어서, 키보드(20)의 출력데이타 단자(G)의 출력데이타는 오픈콜렉터(21′), 공통선(1) 및 오픈 콜렉터(11″)를 통하여 로직보드(10)의 입력단자(B)에 인가되게 하고, 로직보드(10)의 출력데이타단자(A)의 출력데이타는 오픈콜렉터(11'), 공통선(1) 및 오픈콜렉터(21")를 통하여 키보드(20)의 입력데이타단자(H)에 인가되게하며, 키보드(20)의 제어신호 출력단자(I)의 제어신호는 제어선(2)을 통하여 로직보드(10)의 송신 인에이블 단자(D)에는 직접인가되고, 수신 인에이블 단자(C)에는 지연반전회로(12)를 통하여 인가되게 하여, 공통선(1), 제어선(2), 전원공급선(3) 및 접지선(4)의 4선만으로 데이타를 전송할 수 있게함을 특징으로 4선에 의한 키보드 통신방식.In the communication method for transferring data between the keyboard 20 and the logic board 10, the output data of the output data terminal G of the keyboard 20 is an open collector 21 'and a common line 1. And an open collector 11 ″ to be applied to the input terminal B of the logic board 10, and the output data of the output data terminal A of the logic board 10 is an open collector 11 ′, a common line. (1) and the open collector 21 "to be applied to the input data terminal H of the keyboard 20, and the control signal of the control signal output terminal I of the keyboard 20 is connected to the control line 2; Through the delay enable circuit 12 is applied directly to the transmit enable terminal (D) of the logic board 10 through the delay inversion circuit 12, the common line (1), the control line (2) , 4 lines of keyboard communication method characterized in that the data can be transmitted only by the four wires of the power supply line (3) and ground line (4). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019830006383A 1983-12-31 1983-12-31 4-wire keyboard communication method KR850005113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019830006383A KR850005113A (en) 1983-12-31 1983-12-31 4-wire keyboard communication method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019830006383A KR850005113A (en) 1983-12-31 1983-12-31 4-wire keyboard communication method

Publications (1)

Publication Number Publication Date
KR850005113A true KR850005113A (en) 1985-08-21

Family

ID=55177218

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019830006383A KR850005113A (en) 1983-12-31 1983-12-31 4-wire keyboard communication method

Country Status (1)

Country Link
KR (1) KR850005113A (en)

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