JPS62117649U - - Google Patents
Info
- Publication number
- JPS62117649U JPS62117649U JP232286U JP232286U JPS62117649U JP S62117649 U JPS62117649 U JP S62117649U JP 232286 U JP232286 U JP 232286U JP 232286 U JP232286 U JP 232286U JP S62117649 U JPS62117649 U JP S62117649U
- Authority
- JP
- Japan
- Prior art keywords
- time constant
- circuit
- microcomputer
- small
- charging time
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の一実施例を示すプログラム暴
走検知装置の回路図、第２図は同じくウオツチド
グパルスがＬレベルに固定された場合のタイミン
グチヤート、第３図は同じくウオツチドグパルス
がＨレベルに固定された場合のタイミングチヤー
トである。
１：マイクロコンピユータ、２：第一ＲＣ積分
回路、３：第二ＲＣ積分回路、４：排他的論理和
回路、５：リセツトパルス発生回路。
Fig. 1 is a circuit diagram of a program runaway detection device showing an embodiment of the present invention, Fig. 2 is a timing chart when the watchdog pulse is fixed at the L level, and Fig. 3 is the same timing chart when the watchdog pulse is fixed at the L level. This is a timing chart when is fixed at H level. 1: Microcomputer, 2: First RC integrating circuit, 3: Second RC integrating circuit, 4: Exclusive OR circuit, 5: Reset pulse generating circuit.
Claims (1)
ツチドグパルス出力機能が有せしめられ、充電時
定数が大で放電時定数が小なる第一ＲＣ積分回路
と、充電時定数が小で放電時定数が大なる第二Ｒ
Ｃ積分回路とが前記マイクロコンピユータのウオ
ツチドグパルスの出力端子に接続され、前記第一
ＲＣ積分回路および第二ＲＣ積分回路の出力の排
他的論理和をとる排他的論理和回路と、該排他的
論理和回路の出力信号により前記マイクロコンピ
ユータにリセツトパルスを発生するリセツトパル
ス発生回路とが設けられたことを特徴とするプロ
グラム暴走検知装置。 A microcomputer that performs various controls is equipped with a watchdog pulse output function, and a first RC integrating circuit has a large charging time constant and a small discharging time constant, and a second RC integrating circuit has a small charging time constant and a large discharging time constant. 2R
a C integrator circuit connected to the watchdog pulse output terminal of the microcomputer; 1. A program runaway detection device comprising: a reset pulse generation circuit for generating a reset pulse in the microcomputer based on the output signal of the logical OR circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP232286U JPS62117649U (en) | 1986-01-10 | 1986-01-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP232286U JPS62117649U (en) | 1986-01-10 | 1986-01-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62117649U true JPS62117649U (en) | 1987-07-25 |
Family
ID=30781056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP232286U Pending JPS62117649U (en) | 1986-01-10 | 1986-01-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62117649U (en) |
-
1986
- 1986-01-10 JP JP232286U patent/JPS62117649U/ja active Pending
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