JPS5847937U - Operation key detection device - Google Patents

Operation key detection device

Info

Publication number
JPS5847937U
JPS5847937U JP13981581U JP13981581U JPS5847937U JP S5847937 U JPS5847937 U JP S5847937U JP 13981581 U JP13981581 U JP 13981581U JP 13981581 U JP13981581 U JP 13981581U JP S5847937 U JPS5847937 U JP S5847937U
Authority
JP
Japan
Prior art keywords
detection device
operation key
key detection
resistor
keyboard
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.)
Pending
Application number
JP13981581U
Other languages
Japanese (ja)
Inventor
健二 小野木
知加也 伊香
Original Assignee
株式会社ニコン
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 株式会社ニコン filed Critical 株式会社ニコン
Priority to JP13981581U priority Critical patent/JPS5847937U/en
Publication of JPS5847937U publication Critical patent/JPS5847937U/en
Pending legal-status Critical Current

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  • Input From Keyboards Or The Like (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は本考案の一実施例を示す回路図である。 第２図は実施例におけるマイクロプロセッサのキー読み
込みのフローチャート図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention. FIG. 2 is a flowchart of key reading by the microprocessor in the embodiment.

Claims (1)

【実用新案登録請求の範囲】 キーボードの出力を極出し、マイクロプロセッサに割込
み信号を入力する検出回路を有する操作キーの検出装置
において； 前記キーボードの各キー・スキャン信号入力端子に第１
のそれぞれの抵抗を各して電圧を印加し、前記キーボー
ドの各出力端子を第２のそれぞれの抵抗を介して接地し
第２の抵抗は第１の抵抗より十分大きいことを特徴とす
る操作キー検出装置。[Claims for Utility Model Registration] In an operation key detection device having a detection circuit that extracts the output of the keyboard and inputs an interrupt signal to a microprocessor;
An operation key characterized in that a voltage is applied to each of the resistors, and each output terminal of the keyboard is grounded via a second respective resistor, the second resistor being sufficiently larger than the first resistor. Detection device.
JP13981581U 1981-09-22 1981-09-22 Operation key detection device Pending JPS5847937U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13981581U JPS5847937U (en) 1981-09-22 1981-09-22 Operation key detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13981581U JPS5847937U (en) 1981-09-22 1981-09-22 Operation key detection device

Publications (1)

Publication Number Publication Date
JPS5847937U true JPS5847937U (en) 1983-03-31

Family

ID=29932994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13981581U Pending JPS5847937U (en) 1981-09-22 1981-09-22 Operation key detection device

Country Status (1)

Country Link
JP (1) JPS5847937U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62130715U (en) * 1986-02-04 1987-08-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62130715U (en) * 1986-02-04 1987-08-18

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