JPH0382953U

JPH0382953U -

Info

Publication number: JPH0382953U
Application number: JP14479089U
Authority: JP
Priority date: 1989-12-14
Filing date: 1989-12-14
Publication date: 1991-08-23

Description

[Brief explanation of drawings]

第１図は、本考案にかかわるキー接続部の概略
ブロツク図である。第２図は、第１図のキーイン
ターフエース回路の詳細ブロツク図、第３図は、
従来のキーインターフエース回路の詳細ブロツク
図である。ａ，ｂ，ｃ……キーボード２入力信号、ｃ，ｄ
，ｆ……キーボード１入力信号。 FIG. 1 is a schematic block diagram of a key connection section according to the present invention. Fig. 2 is a detailed block diagram of the key interface circuit of Fig. 1, and Fig. 3 is a detailed block diagram of the key interface circuit of Fig. 1.
1 is a detailed block diagram of a conventional key interface circuit; FIG. a, b, c...Keyboard 2 input signal, c, d
, f...Keyboard 1 input signal.

Claims

[Scope of utility model registration request]

A telephone semiconductor integrated circuit consisting of a key interface circuit that generates multiple key interrupts in response to key input, a CPU core that controls the key interface circuit, and peripheral circuits and an oscillation circuit connected to the CPU core. .