JPS59134842U - One-chip microcontroller memory expansion device for in-vehicle electronic equipment - Google Patents

One-chip microcontroller memory expansion device for in-vehicle electronic equipment

Info

Publication number
JPS59134842U
JPS59134842U JP2727783U JP2727783U JPS59134842U JP S59134842 U JPS59134842 U JP S59134842U JP 2727783 U JP2727783 U JP 2727783U JP 2727783 U JP2727783 U JP 2727783U JP S59134842 U JPS59134842 U JP S59134842U
Authority
JP
Japan
Prior art keywords
electronic equipment
expansion device
vehicle electronic
chip microcontroller
data
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
JP2727783U
Other languages
Japanese (ja)
Inventor
眞一 春山
Original Assignee
日本電子機器株式会社
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 日本電子機器株式会社 filed Critical 日本電子機器株式会社
Priority to JP2727783U priority Critical patent/JPS59134842U/en
Publication of JPS59134842U publication Critical patent/JPS59134842U/en
Pending legal-status Critical Current

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  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (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) [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図は本考案の一実施例を示す回路構成図、第２図及
び第３図ｃｊそれぞれデータ読込み時及び書込み時のタ
イムチャート、第４図及び第５図はそれぞれデータ読込
み時及び書込み時のフローチャートである。 １・・・ワンチップマイコン（ＣＰＵ）、２・・・デー
タ・アドレスバス、３・・・外部メモリ、４…アドレス
ラッチ回路、５・・・アドレスバス、６・・・アドレス
デコーダ、７・・・）ツチ制御信号線、８・・・リード
／ライト信号線、９・・・チップ選択信号線。Fig. 1 is a circuit configuration diagram showing an embodiment of the present invention, Figs. 2 and 3 are time charts when reading and writing data, respectively, and Figs. 4 and 5 are timing charts when reading and writing data, respectively. This is a flowchart. 1... One-chip microcomputer (CPU), 2... Data/address bus, 3... External memory, 4... Address latch circuit, 5... Address bus, 6... Address decoder, 7...・) Tsuchi control signal line, 8... Read/write signal line, 9... Chip selection signal line.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] メモリ内蔵で外部アクセス端子の無いワンチップマイコ
ンにおいて、その入出力ポートにデータ・アドレスバス
を接続し、このデータ・アドレスバスを分岐して一方を
外部メモリのデータ入出力ポートに接続し、他方をアド
レスラッチ回路及びアドレスバスを介して外部メモリの
アドレスポートに接続したことを特徴とする車載電子機
器用のワンチップマイコンのメモリ拡張装置。In a one-chip microcontroller with built-in memory and no external access terminals, a data/address bus is connected to its input/output ports, this data/address bus is branched, one is connected to the data input/output port of the external memory, and the other is connected to the data/address bus. A one-chip microcomputer memory expansion device for in-vehicle electronic equipment, characterized in that it is connected to an address port of an external memory via an address latch circuit and an address bus.
JP2727783U 1983-02-28 1983-02-28 One-chip microcontroller memory expansion device for in-vehicle electronic equipment Pending JPS59134842U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2727783U JPS59134842U (en) 1983-02-28 1983-02-28 One-chip microcontroller memory expansion device for in-vehicle electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2727783U JPS59134842U (en) 1983-02-28 1983-02-28 One-chip microcontroller memory expansion device for in-vehicle electronic equipment

Publications (1)

Publication Number Publication Date
JPS59134842U true JPS59134842U (en) 1984-09-08

Family

ID=30158172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2727783U Pending JPS59134842U (en) 1983-02-28 1983-02-28 One-chip microcontroller memory expansion device for in-vehicle electronic equipment

Country Status (1)

Country Link
JP (1) JPS59134842U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02311942A (en) * 1989-05-26 1990-12-27 Nec Corp Cpu external access bus system
JPH04112209A (en) * 1990-09-03 1992-04-14 Fuji Electric Co Ltd Programmable controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02311942A (en) * 1989-05-26 1990-12-27 Nec Corp Cpu external access bus system
JPH04112209A (en) * 1990-09-03 1992-04-14 Fuji Electric Co Ltd Programmable controller

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