JPS59161191U - electronic musical instruments - Google Patents

electronic musical instruments

Info

Publication number
JPS59161191U
JPS59161191U JP5636483U JP5636483U JPS59161191U JP S59161191 U JPS59161191 U JP S59161191U JP 5636483 U JP5636483 U JP 5636483U JP 5636483 U JP5636483 U JP 5636483U JP S59161191 U JPS59161191 U JP S59161191U
Authority
JP
Japan
Prior art keywords
timer
key
central processing
processing unit
electronic musical
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
JP5636483U
Other languages
Japanese (ja)
Inventor
小池　立簡
Original Assignee
ヤマハ株式会社
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 ヤマハ株式会社 filed Critical ヤマハ株式会社
Priority to JP5636483U priority Critical patent/JPS59161191U/en
Publication of JPS59161191U publication Critical patent/JPS59161191U/en
Pending legal-status Critical Current

Links

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) [Summary] 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図はこの考案の一実施例の構成を示すブロック図、
第２図イ９口は各々第１図におけるＣＰＵ　ｌにおいて
行われるメインルーチンおよび割込処理ルーチンの各フ
ローチャートである。　　　　　　−１・・・・・・中
央処理装置（ＣＰＵ）、４・・・・・・トーンジェネレ
ータ、６・・・・・・電源オフ指令検出回路、７・・・
・・・電源回路、８・・・・・・キースイッチ回路、１
０・・・・・・夕　　　。 イマ。FIG. 1 is a block diagram showing the configuration of an embodiment of this invention.
FIG. 2B is a flowchart of a main routine and an interrupt processing routine executed in CPU I in FIG. 1, respectively. -1...Central processing unit (CPU), 4...Tone generator, 6...Power off command detection circuit, 7...
...Power supply circuit, 8...Key switch circuit, 1
0...Evening. Now.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 鍵盤と、この鍵盤の各キーに対応して設けられたキー操
作検出用のキースイッチと、楽音を形成する楽音形成部
と、前記各キースイッチのオン／オフ状態を検出し、こ
の検出結果に基づいて前記楽音形成部を駆動するプログ
ラムコントロールによる中央処理装置と、前記中央処理
装置によって制御されミ所定のタイマ時間が経過した時
点で前記中央処理装置へ割込信号を出力するタイマとを
具備し、前記中央処理装置は、いずれかのキースイッチ
が操作されたことを検出したとき前記タイマをリセット
し、前記タイマから割込信号が供給されたとき電源部へ
電源オフ指令を出力することを特徴とする電子楽器。A keyboard, a key switch for detecting key operations provided corresponding to each key of the keyboard, a musical tone forming section that forms a musical tone, and the on/off state of each of the key switches are detected, and based on the detection result. and a timer that is controlled by the central processing unit and outputs an interrupt signal to the central processing unit when a predetermined timer period has elapsed. , wherein the central processing unit resets the timer when detecting that any key switch has been operated, and outputs a power off command to the power supply unit when an interrupt signal is supplied from the timer. An electronic musical instrument.
JP5636483U 1983-04-15 1983-04-15 electronic musical instruments Pending JPS59161191U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5636483U JPS59161191U (en) 1983-04-15 1983-04-15 electronic musical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5636483U JPS59161191U (en) 1983-04-15 1983-04-15 electronic musical instruments

Publications (1)

Publication Number Publication Date
JPS59161191U true JPS59161191U (en) 1984-10-29

Family

ID=30186687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5636483U Pending JPS59161191U (en) 1983-04-15 1983-04-15 electronic musical instruments

Country Status (1)

Country Link
JP (1) JPS59161191U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04274489A (en) * 1991-03-01 1992-09-30 Yamaha Corp Power supply device of electronic musical instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04274489A (en) * 1991-03-01 1992-09-30 Yamaha Corp Power supply device of electronic musical instrument

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