JPS60184137U

JPS60184137U - interface circuit

Info

Publication number: JPS60184137U
Application number: JP7191484U
Authority: JP
Inventors: 三輪　光雄
Original assignee: 日本電気株式会社
Priority date: 1984-05-18
Filing date: 1984-05-18
Publication date: 1985-12-06

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図は従来のインターフェース回路を含む通信装置側
回路並びに端末装置側回路を示す回路図、第２図は本考
案の実施例であるインターフェース回路を含む通信装置
側回路並びに端末装置側回路を示す回路図である。１・・・・・・通信装置側回路、２・・・・・・端末装
置側回路、３・・・・・・インターフェース回路、４・
・・・・−ＣＲ型イニシャル・リセット回路、５・・・
・・・コンデンサ、６・・・・・・マイクロプロセッサ
、７，８・・・・・・電源ライン、９・・・・・・信号
ライン、１０・・・・・・ダイオード、１１．１２・・
・・・・接続、魚　１３・・・・・・抵抗、１４・・曲
充電ライン。Fig. 1 is a circuit diagram showing a communication device side circuit including a conventional interface circuit and a terminal device side circuit, and Fig. 2 shows a communication device side circuit including an interface circuit and a terminal device side circuit according to an embodiment of the present invention. It is a circuit diagram. 1...Communication device side circuit, 2...Terminal device side circuit, 3...Interface circuit, 4.
...-CR type initial reset circuit, 5...
...Capacitor, 6...Microprocessor, 7,8...Power line, 9...Signal line, 10...Diode, 11.12.・
...Connection, fish 13...Resistance, 14...Song charging line.

Claims

[Scope of utility model registration request]

CR for microprocessors whose power is supplied from the main power supply
An interface that is provided in a communication device having a type initial reset circuit, and that sends and receives signals via a signal line to a terminal device that has an independent power source separate from the main electric drive and has a common ground line with the communication device. An interface circuit according to claim 1, further comprising a diode that prevents current from flowing from the independent power supply to the CR type initial nullset circuit through the signal line.