JPS5988748U - Runaway detection circuit for microcomputer - Google Patents
Runaway detection circuit for microcomputerInfo
- Publication number
- JPS5988748U JPS5988748U JP18149482U JP18149482U JPS5988748U JP S5988748 U JPS5988748 U JP S5988748U JP 18149482 U JP18149482 U JP 18149482U JP 18149482 U JP18149482 U JP 18149482U JP S5988748 U JPS5988748 U JP S5988748U
- Authority
- JP
- Japan
- Prior art keywords
- microcomputer
- output signal
- circuit
- detection circuit
- frequency
- 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
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
第１図は本考案によるマイクロコンピュータ用暴走検知
回路の一実施例を示す回路図、第２図ａ〜ｄは第１図に
示す回路の各部動作波形図、第３図は第１図に示すウィ
ンドコンパレータの特性図である。
１・・・・・・マイクロコンピュータ、３・・・・・・
微分回路、９・・・・・・モノマルチバイブレータ回路
、１３・・・・・・ローパスフィルタ、１９・・・・・
・ウィンドコンパレータ、２５・・・・・・スイッチン
グ回路。FIG. 1 is a circuit diagram showing an embodiment of the runaway detection circuit for a microcomputer according to the present invention, FIGS. 2 a to d are operation waveform diagrams of each part of the circuit shown in FIG. 1, and FIG. 3 is the same as that shown in FIG. 1. It is a characteristic diagram of a window comparator. 1...Microcomputer, 3...
Differential circuit, 9... Mono multivibrator circuit, 13... Low pass filter, 19...
・Window comparator, 25...Switching circuit.
Claims (1)
微分する微分回路と、この微分回路の出力信号を入力と
してその入力周波数に応じたレベルの出力信号を発生す
る周波数・電圧変換回路と、この周波数・電圧変換回路
の出力信号が予め定められている上下限値範囲を越えた
場合に前記マイクロコンピュータが暴走していることを
示す出力信号を発生して前記マイクロコンピュータに対
するリセット制御を行なうウィンドコンパレータとを備
えたマイクロコンピュータ用暴走検知回路。A differentiating circuit that differentiates a dead man signal generated from a microcomputer, a frequency/voltage converter circuit that receives the output signal of this differentiator circuit and generates an output signal at a level corresponding to the input frequency, and this frequency/voltage converter circuit. a window comparator that generates an output signal indicating that the microcomputer is out of control when the output signal of the microcomputer exceeds a predetermined upper and lower limit value range, and performs reset control on the microcomputer. Runaway detection circuit for computers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18149482U JPS5988748U (en) | 1982-11-30 | 1982-11-30 | Runaway detection circuit for microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18149482U JPS5988748U (en) | 1982-11-30 | 1982-11-30 | Runaway detection circuit for microcomputer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5988748U true JPS5988748U (en) | 1984-06-15 |
Family
ID=30393269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18149482U Pending JPS5988748U (en) | 1982-11-30 | 1982-11-30 | Runaway detection circuit for microcomputer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5988748U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6143348A (en) * | 1984-08-07 | 1986-03-01 | Hitachi Ltd | Fail-safe computer system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS576944A (en) * | 1980-06-13 | 1982-01-13 | Mitsubishi Electric Corp | Fault detecting device |
| JPS57182858A (en) * | 1981-05-06 | 1982-11-10 | Japan Electronic Control Syst Co Ltd | Monitor circuit for program runaway in computer |
| JPS57191762A (en) * | 1981-05-20 | 1982-11-25 | Toshiba Corp | Abnormality detecting device |
-
1982
- 1982-11-30 JP JP18149482U patent/JPS5988748U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS576944A (en) * | 1980-06-13 | 1982-01-13 | Mitsubishi Electric Corp | Fault detecting device |
| JPS57182858A (en) * | 1981-05-06 | 1982-11-10 | Japan Electronic Control Syst Co Ltd | Monitor circuit for program runaway in computer |
| JPS57191762A (en) * | 1981-05-20 | 1982-11-25 | Toshiba Corp | Abnormality detecting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6143348A (en) * | 1984-08-07 | 1986-03-01 | Hitachi Ltd | Fail-safe computer system |
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