KR920022304U - 마이크로 컴퓨터의 키이신호 입력회로 - Google Patents

마이크로 컴퓨터의 키이신호 입력회로

Info

Publication number
KR920022304U
KR920022304U KR2019910006375U KR910006375U KR920022304U KR 920022304 U KR920022304 U KR 920022304U KR 2019910006375 U KR2019910006375 U KR 2019910006375U KR 910006375 U KR910006375 U KR 910006375U KR 920022304 U KR920022304 U KR 920022304U
Authority
KR
South Korea
Prior art keywords
microcomputer
signal input
input circuit
key signal
key
Prior art date
Application number
KR2019910006375U
Other languages
English (en)
Other versions
KR930008505Y1 (ko
Inventor
백복현
Original Assignee
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 주식회사 금성사 filed Critical 주식회사 금성사
Priority to KR2019910006375U priority Critical patent/KR930008505Y1/ko
Priority to JP1992029197U priority patent/JP2581051Y2/ja
Priority to US07/876,797 priority patent/US5521575A/en
Publication of KR920022304U publication Critical patent/KR920022304U/ko
Application granted granted Critical
Publication of KR930008505Y1 publication Critical patent/KR930008505Y1/ko

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/02—Input circuits
    • 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
    • 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
    • H03M11/22—Static coding
    • H03M11/24—Static coding using analogue means, e.g. by coding the states of multiple switches into a single multi-level analogue signal or by indicating the type of a device using the voltage level at a specific tap of a resistive divider

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
KR2019910006375U 1991-05-04 1991-05-04 마이크로 컴퓨터의 키이신호 입력회로 KR930008505Y1 (ko)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR2019910006375U KR930008505Y1 (ko) 1991-05-04 1991-05-04 마이크로 컴퓨터의 키이신호 입력회로
JP1992029197U JP2581051Y2 (ja) 1991-05-04 1992-05-01 マイクロコンピュータのキー信号入力回路
US07/876,797 US5521575A (en) 1991-05-04 1992-05-01 Key signal input circuit for microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019910006375U KR930008505Y1 (ko) 1991-05-04 1991-05-04 마이크로 컴퓨터의 키이신호 입력회로

Publications (2)

Publication Number Publication Date
KR920022304U true KR920022304U (ko) 1992-12-19
KR930008505Y1 KR930008505Y1 (ko) 1993-12-22

Family

ID=19313508

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019910006375U KR930008505Y1 (ko) 1991-05-04 1991-05-04 마이크로 컴퓨터의 키이신호 입력회로

Country Status (3)

Country Link
US (1) US5521575A (ko)
JP (1) JP2581051Y2 (ko)
KR (1) KR930008505Y1 (ko)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2291762B (en) * 1994-07-26 1999-04-07 Nokia Mobile Phones Ltd Mobile telephone
KR100203745B1 (ko) * 1996-05-27 1999-06-15 윤종용 에이디씨-키 패드 장치 및 그의 제어방법
US6424274B1 (en) * 1999-04-13 2002-07-23 Legerity, Inc. Keypad scanning with few pins
US6577250B1 (en) * 2000-05-19 2003-06-10 Microsoft Corporation Resistance based keyboard key discrimination
US6744386B2 (en) * 2000-06-02 2004-06-01 Thomson Licensing, S.A. Prevention of incompatible keyboard selections from being entered during power initialization
DE10044087A1 (de) * 2000-09-07 2002-04-04 Bosch Gmbh Robert Vorrichtung zur Aktivierung eines Steuergeräts
US6639523B2 (en) * 2001-01-17 2003-10-28 Nokia Corporation Resistive keyboard with status keys
US20040017302A1 (en) * 2002-07-23 2004-01-29 Kylink Communications Corp. Matrix keyboard circuit for attenuating electromagnetic interference
US7688230B2 (en) * 2006-07-13 2010-03-30 Emerson Electric Co. Switching device with critical switch detection
KR100758634B1 (ko) * 2006-07-21 2007-09-14 삼성전자주식회사 이동단말의 홀드기능 제어 방법 및 장치
TWI307520B (en) * 2006-09-15 2009-03-11 Novatek Microelectronics Corp Key system utilizing two operation nodes to detect the status of a plurality of keys
TWI491898B (zh) * 2014-05-16 2015-07-11 Primax Electronics Ltd 薄膜開關電路之測試系統
KR102264398B1 (ko) * 2015-12-08 2021-06-14 현대모비스 주식회사 가산 회로를 이용한 멀티 버튼 인식 장치 및 방법

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58213330A (ja) * 1982-06-07 1983-12-12 Victor Co Of Japan Ltd キ−入力判別装置
JPS59214940A (ja) * 1983-05-19 1984-12-04 Matsushita Electric Ind Co Ltd 信号伝送装置
JPS61196333U (ko) * 1985-05-29 1986-12-08
DE3784829T3 (de) * 1986-10-20 1997-04-17 Matsushita Electric Ind Co Ltd Eingangsvorrichtung mit Tasten.
US4918634A (en) * 1987-02-23 1990-04-17 Minolta Camera Kabushiki Kaisha Key input apparatus
JPH0628020B2 (ja) * 1988-01-22 1994-04-13 株式会社東芝 キー入力装置
JPH0216818A (ja) * 1988-07-04 1990-01-19 Nec Corp Ｋｅｙ入力方式
JPH02184121A (ja) * 1989-01-11 1990-07-18 Matsushita Electric Ind Co Ltd キー入力装置
US5182769A (en) * 1989-10-19 1993-01-26 Kabushiki Kaisha Toshiba Telephone set having a volatile memory

Also Published As

Publication number Publication date
JP2581051Y2 (ja) 1998-09-17
KR930008505Y1 (ko) 1993-12-22
US5521575A (en) 1996-05-28
JPH0675030U (ja) 1994-10-21

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