JPS58142733U - Input/output port multiplexing circuit for one-chip microcontroller for in-vehicle electronic equipment - Google Patents

Input/output port multiplexing circuit for one-chip microcontroller for in-vehicle electronic equipment

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Publication number
JPS58142733U
JPS58142733U JP3587282U JP3587282U JPS58142733U JP S58142733 U JPS58142733 U JP S58142733U JP 3587282 U JP3587282 U JP 3587282U JP 3587282 U JP3587282 U JP 3587282U JP S58142733 U JPS58142733 U JP S58142733U
Authority
JP
Japan
Prior art keywords
input
output port
electronic equipment
chip microcontroller
vehicle electronic
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
JP3587282U
Other languages
Japanese (ja)
Inventor
大楽　芳昭
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 JP3587282U priority Critical patent/JPS58142733U/en
Publication of JPS58142733U publication Critical patent/JPS58142733U/en
Pending legal-status Critical Current

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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図は従来例を示す回路図、第２図は本考案の一実施
例を示す回路図である。 １・・・ＭＣＵ、２・・・外部メモリ、３・・・アドレ
スライン、４・・・データライン、５ａ、　　５ｂ・・
・ゲート、＄ａ、　　５ｂ・・・外部信号ライン、７・
・・アウトプットコントロール出力端子。FIG. 1 is a circuit diagram showing a conventional example, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. 1...MCU, 2...External memory, 3...Address line, 4...Data line, 5a, 5b...
・Gate, $a, 5b...external signal line, 7・
...Output control output terminal.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 外部メモリ用のアドレス又はデータラインが接続される
ワンチップ会マイコンの入出力ポートに、ゲートを介し
て、外部信号ラインを接続し、前記ゲートによりアドレ
ス又はデータラインと外部信号ラインとを選択するよう
にしたことを特徴とする車載電子機器用ワンチップ・マ
イコンの入出力ポート多重化回路。An external signal line is connected via a gate to an input/output port of a one-chip microcomputer to which an address or data line for external memory is connected, and the gate selects the address or data line and the external signal line. An input/output port multiplexing circuit for a one-chip microcontroller for in-vehicle electronic equipment.
JP3587282U 1982-03-16 1982-03-16 Input/output port multiplexing circuit for one-chip microcontroller for in-vehicle electronic equipment Pending JPS58142733U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3587282U JPS58142733U (en) 1982-03-16 1982-03-16 Input/output port multiplexing circuit for one-chip microcontroller for in-vehicle electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3587282U JPS58142733U (en) 1982-03-16 1982-03-16 Input/output port multiplexing circuit for one-chip microcontroller for in-vehicle electronic equipment

Publications (1)

Publication Number Publication Date
JPS58142733U true JPS58142733U (en) 1983-09-26

Family

ID=30047334

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3587282U Pending JPS58142733U (en) 1982-03-16 1982-03-16 Input/output port multiplexing circuit for one-chip microcontroller for in-vehicle electronic equipment

Country Status (1)

Country Link
JP (1) JPS58142733U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597625A (en) * 1979-01-17 1980-07-25 Fanuc Ltd Bus connection system
JPS56103725A (en) * 1980-01-19 1981-08-19 Meidensha Electric Mfg Co Ltd Controlling method of bus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597625A (en) * 1979-01-17 1980-07-25 Fanuc Ltd Bus connection system
JPS56103725A (en) * 1980-01-19 1981-08-19 Meidensha Electric Mfg Co Ltd Controlling method of bus

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