JPH01178634U - - Google Patents

Info

Publication number
JPH01178634U
JPH01178634U JP7680788U JP7680788U JPH01178634U JP H01178634 U JPH01178634 U JP H01178634U JP 7680788 U JP7680788 U JP 7680788U JP 7680788 U JP7680788 U JP 7680788U JP H01178634 U JPH01178634 U JP H01178634U
Authority
JP
Japan
Prior art keywords
key switch
terminal
shorts
input terminal
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP7680788U
Other languages
Japanese (ja)
Other versions
JPH0615310Y2 (en
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 filed Critical
Priority to JP1988076807U priority Critical patent/JPH0615310Y2/en
Publication of JPH01178634U publication Critical patent/JPH01178634U/ja
Application granted granted Critical
Publication of JPH0615310Y2 publication Critical patent/JPH0615310Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の一実施例の構成を示す回路
図、第２図は同実施例の変形例を示す回路図、第
３図は従来のキースイツチ回路の構成例を示す回
路図、第４図はスキヤン信号出力端子Ｄ１〜Ｄ３
から出力されるキースキヤン信号の一例を示す波
形図、第５図は第３図の回路の改良例を示す回路
図、第６図は第５図の回路の問題点を説明するた
めの回路図である。 １……マイクロコンピユータ（制御回路）、８
……キースイツチ、２７……短絡回路、Ｄ１〜Ｄ
３……スキヤン信号出力端子、Ｋ１〜Ｋ３……オ
ン／オフ情報入力端子。 FIG. 1 is a circuit diagram showing the configuration of an embodiment of this invention, FIG. 2 is a circuit diagram showing a modification of the same embodiment, FIG. 3 is a circuit diagram showing an example of the configuration of a conventional key switch circuit, and FIG. The figure shows scan signal output terminals D1 to D3.
FIG. 5 is a circuit diagram showing an example of an improvement of the circuit in FIG. 3, and FIG. 6 is a circuit diagram for explaining problems with the circuit in FIG. 5. be. 1...Microcomputer (control circuit), 8
...Key switch, 27...Short circuit, D1-D
3...Scan signal output terminal, K1 to K3...On/off information input terminal.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] キースキヤン信号が繰り返し出力される複数の
出力端子と、キースイツチのオン／オフ情報を入
力するための入力端子とを有する制御回路に接続
されるキースイツチ回路において、キースイツチ
を常時短絡する部品に代えて前記出力端子および
前記入力端子間を最短距離で短絡する短絡回路を
設けてなるキースイツチ回路。 In a key switch circuit connected to a control circuit that has a plurality of output terminals to which key scan signals are repeatedly output and an input terminal for inputting key switch on/off information, the output terminal is used instead of a component that constantly shorts the key switch. A key switch circuit provided with a short circuit that shorts the shortest distance between a terminal and the input terminal.
JP1988076807U 1988-06-09 1988-06-09 Key switch circuit Expired - Lifetime JPH0615310Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988076807U JPH0615310Y2 (en) 1988-06-09 1988-06-09 Key switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988076807U JPH0615310Y2 (en) 1988-06-09 1988-06-09 Key switch circuit

Publications (2)

Publication Number Publication Date
JPH01178634U true JPH01178634U (en) 1989-12-21
JPH0615310Y2 JPH0615310Y2 (en) 1994-04-20

Family

ID=31301817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988076807U Expired - Lifetime JPH0615310Y2 (en) 1988-06-09 1988-06-09 Key switch circuit

Country Status (1)

Country Link
JP (1) JPH0615310Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012112576A (en) * 2010-11-24 2012-06-14 Harman Co Ltd Operation detection circuit for operation switch, and heating cooker using the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885229U (en) * 1981-11-30 1983-06-09 富士ゼロックス株式会社 key matrix circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885229U (en) * 1981-11-30 1983-06-09 富士ゼロックス株式会社 key matrix circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012112576A (en) * 2010-11-24 2012-06-14 Harman Co Ltd Operation detection circuit for operation switch, and heating cooker using the same

Also Published As

Publication number Publication date
JPH0615310Y2 (en) 1994-04-20

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