KR920018568A - Micom's key input circuit - Google Patents

Micom's key input circuit Download PDF

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Publication number
KR920018568A
KR920018568A KR1019910004076A KR910004076A KR920018568A KR 920018568 A KR920018568 A KR 920018568A KR 1019910004076 A KR1019910004076 A KR 1019910004076A KR 910004076 A KR910004076 A KR 910004076A KR 920018568 A KR920018568 A KR 920018568A
Authority
KR
South Korea
Prior art keywords
key input
keyboard
microcomputer
input circuit
input signal
Prior art date
Application number
KR1019910004076A
Other languages
Korean (ko)
Other versions
KR930012131B1 (en
Inventor
김성은
Original Assignee
이헌조
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 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019910004076A priority Critical patent/KR930012131B1/en
Publication of KR920018568A publication Critical patent/KR920018568A/en
Application granted granted Critical
Publication of KR930012131B1 publication Critical patent/KR930012131B1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/20—Dynamic coding, i.e. by key scanning
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • H03K17/9622—Capacitive touch switches using a plurality of detectors, e.g. keyboard
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element
    • H03K17/98—Switches controlled by moving an element forming part of the switch using a capacitive movable element having a plurality of control members, e.g. keyboard

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

내용 없음No content

Description

마이컴의 키 입력회로Micom's key input circuit

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

제5도는 본 발명에 따른 마이컴의 키 입력회로도,5 is a key input circuit diagram of a microcomputer according to the present invention;

제6도는 제5도에 따른 키 신호의 시정수 파형도,6 is a time constant waveform diagram of a key signal according to FIG.

제8도는 제5도의 각 키 신호에 따른 슈미트 트리거 버퍼의 출력 타이밍도.8 is an output timing diagram of a Schmitt trigger buffer according to each key signal of FIG.

Claims (2)

스위치(S1-Sn)의 눌림에 따라 각기 다른 시정수를 갖는 키 입력신호를 출력하게 키보드(23)를 구성하여 마이컴측에서 그 키보드(23)의 키 입력신호를 한 라인으로 입력받아 키 입력신호의 시정수에 비례하는 구형파펄스로 변환한 후 그 구형파펄스에 비례하는 메인클럭(CLK)의 수를 카운트하여 그 카운트값에 의해 마이크로프로세서(21)가 상기 키보드(23) 스위치(S1-Sn) 눌림상태를 판별하도록 구성하여 된 것을 특징으로 하는 마이컴의 키 입력회로.The keyboard 23 is configured to output key input signals having different time constants as the switches S 1 to S n are pressed, and the key input signal of the keyboard 23 is input on the micom side as a line. After converting into a square wave pulse proportional to the time constant of the input signal, the number of main clocks CLK proportional to the square wave pulse is counted, and the microprocessor 21 switches the keyboard 23 switch S 1 based on the count value. -S n ) Key input circuit of the microcomputer, characterized in that configured to determine the pressed state. 제1항에 있어서, 키보드(23)는 다이오드(D21)의 캐소우드에 각 스위치(S1-Sn)의 일측고정단자를 공통접속하고, 각 타측고정단자를 공통으로 접지측에 접속하며, 각 가동단자를 용량이 순차적으로 다른 콘덴서(C1-Cn)를 각기 통해 접지측에 접속한 후, 상기 다이오드(D21)의 애노우드를 마이컴측에 연결하여 저항(R21)을 통해 전원 전압(Vcc)을 풀업받아 키 입력신호출력을 하도록 구성하여 된 것을 특징으로 하는 마이컴의 키 입력회로.2. The keyboard 23 according to claim 1, wherein the keyboard 23 connects one fixed terminal of each switch S 1 -S n to the cathode of the diode D 21 in common, and connects the other fixed terminal to the ground side in common. After connecting each of the movable terminals to the ground side through the capacitor (C 1 -C n ) having a different capacity in sequence, the anode of the diode (D 21 ) is connected to the microcomputer side through the resistor (R 21 ) A key input circuit of a microcomputer, characterized in that configured to perform a key input signal output by receiving a power-up voltage (Vcc). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910004076A 1991-03-14 1991-03-14 Keyboard for micro-computer KR930012131B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910004076A KR930012131B1 (en) 1991-03-14 1991-03-14 Keyboard for micro-computer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910004076A KR930012131B1 (en) 1991-03-14 1991-03-14 Keyboard for micro-computer

Publications (2)

Publication Number Publication Date
KR920018568A true KR920018568A (en) 1992-10-22
KR930012131B1 KR930012131B1 (en) 1993-12-24

Family

ID=19312098

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910004076A KR930012131B1 (en) 1991-03-14 1991-03-14 Keyboard for micro-computer

Country Status (1)

Country Link
KR (1) KR930012131B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104360752A (en) * 2014-11-10 2015-02-18 深圳市元征科技股份有限公司 MCU (micro control unit) keyboard circuit and implementation method for same

Also Published As

Publication number Publication date
KR930012131B1 (en) 1993-12-24

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