JPS59126334U

JPS59126334U - keyboard circuit

Info

Publication number: JPS59126334U
Application number: JP1910383U
Authority: JP
Inventors: 裕之橋本
Original assignee: 株式会社ケンウッド
Priority date: 1983-02-14
Filing date: 1983-02-14
Publication date: 1984-08-25

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

[Brief explanation of the drawing]

第１図は従来のキーボード回路を示す回路図、第２図は
本考案に係るキーボード回路の実施例を示す回路図であ
る。１・・・押釦、２・・・第１の入力ポート、３・・・第
２の入力ポート、４・・・電源供給線、５・・・交点、
Ａ□〜Ａ、・・・横方向の共通線、Ｂ□〜Ｂ、・・・縦
方向の共通線、ＣＰＵ・・・中央演算処理装置。FIG. 1 is a circuit diagram showing a conventional keyboard circuit, and FIG. 2 is a circuit diagram showing an embodiment of the keyboard circuit according to the present invention. 1... Push button, 2... First input port, 3... Second input port, 4... Power supply line, 5... Intersection,
A□~A,... horizontal common line, B□~B,... vertical common line, CPU... central processing unit.

Claims

[Scope of utility model registration request]

A keyboard circuit having push buttons arranged vertically and horizontally by matrix wiring, the first input port having a common line common to each push button arranged in the horizontal direction arranged in each row; It consists of a second input port in which a common line common to each of the arranged pushbuttons is arranged in each column, and a power supply line common to all the pushbuttons, and each pushbutton corresponds to its arrangement position. A keyboard circuit characterized in that it is configured such that a power supply line can be connected to two vertical and horizontal common lines.