JPS6184902U - - Google Patents
Info
- Publication number
- JPS6184902U JPS6184902U JP16937084U JP16937084U JPS6184902U JP S6184902 U JPS6184902 U JP S6184902U JP 16937084 U JP16937084 U JP 16937084U JP 16937084 U JP16937084 U JP 16937084U JP S6184902 U JPS6184902 U JP S6184902U
- Authority
- JP
- Japan
- Prior art keywords
- microcomputer
- reset
- runaway
- vehicle
- 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.)
- Pending
Links
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
Landscapes
- Safety Devices In Control Systems (AREA)
Description
第１図は、本考案の好適な実施例を示す電気回
路図である。第２図は、第１図に示す電気回路の
各部の信号波形を示すタイムチヤートである。第
３図は、第１図に示すＣＰＵのサブルーチンを示
すフローチヤートである。
１……ウオツチドツグリセツト記憶回路、２…
…ＣＰＵ、３……ＲＡＭ、４……ＲＯＭ、５……
マルチプレクサ、６……ウオツチドツグ回路、７
……リセツト回路、８……ＲＡＭ記憶保持回路、
９……ＲＡＭ用電源、１０……定電圧電源、１１
……イグニシヨンスイツチ。
FIG. 1 is an electrical circuit diagram showing a preferred embodiment of the present invention. FIG. 2 is a time chart showing signal waveforms at various parts of the electric circuit shown in FIG. FIG. 3 is a flowchart showing a subroutine of the CPU shown in FIG. 1... Watchdog reset memory circuit, 2...
...CPU, 3...RAM, 4...ROM, 5...
Multiplexer, 6...Watchdog circuit, 7
...Reset circuit, 8...RAM memory retention circuit,
9...RAM power supply, 10... Constant voltage power supply, 11
...Ignition switch.
Claims (1)
クロコンピユータをリセツトするウオツチドツグ
回路を備えた車両用マイクロコンピユータ装置に
於いて、前記マイクロコンピユータがリセツトさ
れた時当該マイクロコンピユータとの協働により
車両の電源スイツチのオン、オフ作用によりリセ
ツトかマイクロコンピユータの暴走によるリセツ
トかを検知し、暴走によるリセツトの場合は無条
件で読み書き可能なＲＡＭをクリアしマイクロコ
ンピユータ装置の異常動作を防止すべく構成され
たウオツチドツグリセツト記憶回路を備えてなる
車両用マイクロコンピユータ装置のリセツト補償
回路。 In a vehicle microcomputer device equipped with a watchdog circuit that detects runaway of the microcomputer and resets the microcomputer, when the microcomputer is reset, the device cooperates with the microcomputer to turn on the power switch of the vehicle. The watchdog is configured to detect whether the reset is due to an off action or a runaway of the microcomputer, and if the reset is due to a runaway, it unconditionally clears the read/write RAM to prevent abnormal operation of the microcomputer. A reset compensation circuit for a vehicle microcomputer device comprising a reset memory circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16937084U JPS6184902U (en) | 1984-11-08 | 1984-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16937084U JPS6184902U (en) | 1984-11-08 | 1984-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6184902U true JPS6184902U (en) | 1986-06-04 |
Family
ID=30727109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16937084U Pending JPS6184902U (en) | 1984-11-08 | 1984-11-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6184902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6449444A (en) * | 1987-08-20 | 1989-02-23 | Oki Electric Ind Co Ltd | Reset signal discrimination circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725002A (en) * | 1980-12-17 | 1982-02-09 | Yokogawa Hokushin Electric Corp | Contol device using microcomputer |
-
1984
- 1984-11-08 JP JP16937084U patent/JPS6184902U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725002A (en) * | 1980-12-17 | 1982-02-09 | Yokogawa Hokushin Electric Corp | Contol device using microcomputer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6449444A (en) * | 1987-08-20 | 1989-02-23 | Oki Electric Ind Co Ltd | Reset signal discrimination circuit |
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