JPS5824846U - Automotive microcomputer system - Google Patents

Automotive microcomputer system

Info

Publication number
JPS5824846U
JPS5824846U JP11864881U JP11864881U JPS5824846U JP S5824846 U JPS5824846 U JP S5824846U JP 11864881 U JP11864881 U JP 11864881U JP 11864881 U JP11864881 U JP 11864881U JP S5824846 U JPS5824846 U JP S5824846U
Authority
JP
Japan
Prior art keywords
voltage
outputs
microprocessing unit
power supply
circuit
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.)
Granted
Application number
JP11864881U
Other languages
Japanese (ja)
Other versions
JPS6132438Y2 (en
Inventor
池田　一男
勝美 栗田
Original Assignee
カルソニックカンセイ株式会社
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 カルソニックカンセイ株式会社 filed Critical カルソニックカンセイ株式会社
Priority to JP11864881U priority Critical patent/JPS5824846U/en
Publication of JPS5824846U publication Critical patent/JPS5824846U/en
Application granted granted Critical
Publication of JPS6132438Y2 publication Critical patent/JPS6132438Y2/ja
Granted 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) [Abstract] 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図は本考案からなる車載用マイクロコーンピユータ
シス゛テムの一実施例を示すブロック構成図、第２図は
第１図の要部各点の波形を示すタイムチャート図である
。 １・・・マイクロプロセッシングユニット、２・・・セ
ン今、３・・・外部機器、４・・・電源回路、５・・・
車載用バッテリ、６・・・アクセサリスイッチ、７・・
・電圧検出回路、８・・・制御信号発生回路。FIG. 1 is a block diagram showing an embodiment of the in-vehicle microcon computer system according to the present invention, and FIG. 2 is a time chart showing waveforms at various points in the main parts of FIG. 1... Microprocessing unit, 2... Sensor, 3... External device, 4... Power supply circuit, 5...
Vehicle battery, 6...Accessory switch, 7...
- Voltage detection circuit, 8... control signal generation circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ホールト機能及び外部リセット機能を有するマイクロプ
ロセッシングユニット１と、車載バッテリ５からの電力
供給を電源スィッチ６を介して受けて前記マイクロプロ
セッシングユニット１に規定の作動電圧を供給する電源
回路４と、該電源回路４の入力電圧が該電源回路４から
前記マイクロプロセッシングユニット１にその最低保証
作動電圧に対応する出力電圧を供給する所定の電圧レベ
ルを上廻っているか否かを検出する電圧検出回路７とヲ
備え、前記マイクロプロセッシングユニット１は、前記
電圧検出回路７から前記電源回路４の入力電圧が前記所
定の電圧レベルを下廻ったことを示す検出信号が出力さ
れたときに、前記車載バッテリ５等によって不揮発性化
されてなるメモリ１４に記憶すべき内容の処理及び書込
みを優先的になし、かつその後にホールト解除できる状
態になったことを示すホールト指示信号ｄを出力するよ
うに構成され、前記電源回路４は、前記電圧検出回路７
が前記電源回路４の入力電圧が前記所定の電圧レベルを
下廻ったことを示す検出信号を出力してから前記マイク
ロプロセッシングユニット１が前記ホールト指示信号ｄ
を出力するまでの間出力電圧が前記最低保証作動電圧を
下廻らないように保ｉするように構成されてなり、更に
、前記電圧検出回路７から前記電源回路４の入力電圧が
前記所定の電圧レベルを下廻ったことを水子検出信号が
出力されると共に前記マイクロプロセッシングユニット
１から前記ホールト指示信号ｄが出力されたときに、前
記マイクロプロセッシングユニット１をホールト制御す
る信号を出力し、かつ前記電圧検出回路７から前記電源
回路４の入力電圧が前記所定の電圧レベルを上廻ったこ
とを示す検出信号が出力されたときに、前記マイクロプ
ロ妄ツシングユニット１をホールト解除する信号を出力
すると共にそれに同期して前記マイクロプロセッシング
ユニット１をリセットする信号を出力する制御信号発生
回路８を設けたことを特徴とする車載用マイクロコンピ
ュータシステム。A microprocessing unit 1 having a halt function and an external reset function; a power supply circuit 4 that receives power from an on-vehicle battery 5 via a power switch 6 and supplies a specified operating voltage to the microprocessing unit 1; a voltage detection circuit 7 for detecting whether the input voltage of the circuit 4 exceeds a predetermined voltage level for supplying an output voltage corresponding to the minimum guaranteed operating voltage from the power supply circuit 4 to the microprocessing unit 1; When the voltage detection circuit 7 outputs a detection signal indicating that the input voltage of the power supply circuit 4 has fallen below the predetermined voltage level, the microprocessing unit 1 is configured to perform a non-volatile process using the vehicle battery 5 or the like. The power supply circuit is configured to process and write content to be stored in the encoded memory 14 on a priority basis, and then output a halt instruction signal d indicating that the halt state can be released. 4 is the voltage detection circuit 7
outputs a detection signal indicating that the input voltage of the power supply circuit 4 has fallen below the predetermined voltage level, and then the microprocessing unit 1 outputs the halt instruction signal d.
The output voltage is maintained so as not to fall below the minimum guaranteed operating voltage until the output voltage is output, and further, the input voltage from the voltage detection circuit 7 to the power supply circuit 4 is set to the predetermined voltage. When the microprocessing unit 1 outputs the halt instruction signal d at the same time as the water detection signal indicating that the voltage has fallen below the level, the microprocessing unit 1 outputs a signal for halt-controlling the microprocessing unit 1; When the detection circuit 7 outputs a detection signal indicating that the input voltage of the power supply circuit 4 exceeds the predetermined voltage level, outputs a signal for releasing the hold of the microprocessor switching unit 1; An on-vehicle microcomputer system comprising a control signal generation circuit 8 which outputs a signal for resetting the microprocessing unit 1 in synchronization with the control signal generation circuit 8.
JP11864881U 1981-08-10 1981-08-10 Automotive microcomputer system Granted JPS5824846U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11864881U JPS5824846U (en) 1981-08-10 1981-08-10 Automotive microcomputer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11864881U JPS5824846U (en) 1981-08-10 1981-08-10 Automotive microcomputer system

Publications (2)

Publication Number Publication Date
JPS5824846U true JPS5824846U (en) 1983-02-17
JPS6132438Y2 JPS6132438Y2 (en) 1986-09-20

Family

ID=29912771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11864881U Granted JPS5824846U (en) 1981-08-10 1981-08-10 Automotive microcomputer system

Country Status (1)

Country Link
JP (1) JPS5824846U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6240546A (en) * 1985-08-19 1987-02-21 Nippon Denso Co Ltd Control device for on-vehicle computer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6240546A (en) * 1985-08-19 1987-02-21 Nippon Denso Co Ltd Control device for on-vehicle computer

Also Published As

Publication number Publication date
JPS6132438Y2 (en) 1986-09-20

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