JPS62100544U - - Google Patents
Info
- Publication number
- JPS62100544U JPS62100544U JP19338185U JP19338185U JPS62100544U JP S62100544 U JPS62100544 U JP S62100544U JP 19338185 U JP19338185 U JP 19338185U JP 19338185 U JP19338185 U JP 19338185U JP S62100544 U JPS62100544 U JP S62100544U
- Authority
- JP
- Japan
- Prior art keywords
- microcomputers
- pulse signals
- runaway detection
- microcomputer
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Debugging And Monitoring (AREA)
- Multi Processors (AREA)
Description
第１図はこの考案に係るマイクロコンピユータ
の暴走検知システムのブロツク接続図、第２図は
そのブロツク接続図各部の信号波形図、第３図は
従来の同様の暴走検知システムを示すブロツク接
続図である。
１，２……マイクロコンピユータ、３……外部
発振回路、４……暴走検知回路、６……リセツト
パルス発生回路。
Fig. 1 is a block connection diagram of the microcomputer runaway detection system according to this invention, Fig. 2 is a signal waveform diagram of each part of the block connection diagram, and Fig. 3 is a block connection diagram showing a similar conventional runaway detection system. be. 1, 2...Microcomputer, 3...External oscillation circuit, 4...Runaway detection circuit, 6...Reset pulse generation circuit.
Claims (1)
行う２つのマイクロコンピユータ１，２を備え、
これらのマイクロコンピユータ１，２は、夫々プ
ログラムが正常に動作しうる状態にあるときに、
その外部に設けられた外部発振回路３から入力さ
れるクロツク信号Ｓ０に基づいて、互いに論理が
反転関係にある２つのパルス信号Ｓ１，Ｓ２を夫
々所定の出力ポート１ａ，２ａから出力するプロ
グラムを有し、さらに上記各マイクロコンピユー
タ１，２の各出力ポート１ａ，２ａから出力され
る２つのパルス信号Ｓ１，Ｓ２を入力し、これら
のパルス信号Ｓ１，Ｓ２の論理が互いに反転関係
を保つているか否かを検出する暴走検知回路４を
備えたことを特徴とするマイクロコンピユータの
暴走検知システム。 (2) 暴走検知回路４はマイクロコンピユータ１
，２の各出力ポート１ａ，２ａから夫々出力され
る２つのパルス信号Ｓ１，Ｓ２の論理が互いに反
転関係を逸脱したことを検出したときに、上記各
マイクロコンピユータ１，２の各プログラムをリ
セツトせしめるリセツト信号Ｒ１を発生するか、
又は警報を発生する回路であることを特徴とする
実用新案登録請求の範囲第(1)項記載のマイクロ
コンピユータの暴走検知システム。[Claims for Utility Model Registration] (1) Equipped with two microcomputers 1 and 2 that perform predetermined system control according to a program,
When these microcomputers 1 and 2 are in a state where their respective programs can operate normally,
Based on a clock signal S0 inputted from an external oscillation circuit 3 provided outside, two pulse signals S1 and S2 whose logics are inverse to each other are outputted from predetermined output ports 1a and 2a, respectively. program, and further inputs two pulse signals S 1 and S 2 output from each output port 1a and 2a of each of the microcomputers 1 and 2, and the logic of these pulse signals S 1 and S 2 is mutually A runaway detection system for a microcomputer, comprising a runaway detection circuit 4 for detecting whether an inversion relationship is maintained. (2) The runaway detection circuit 4 is connected to the microcomputer 1
, 2, when it is detected that the logics of the two pulse signals S 1 and S 2 outputted from the output ports 1a and 2a of the microcomputers 1 and 2, respectively, deviate from the inversion relationship, the respective programs of the microcomputers 1 and 2 are executed. Generate a reset signal R1 to reset the
or a circuit for generating an alarm, the microcomputer runaway detection system according to claim (1) of the utility model registration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19338185U JPH0426915Y2 (en) | 1985-12-16 | 1985-12-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19338185U JPH0426915Y2 (en) | 1985-12-16 | 1985-12-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62100544U true JPS62100544U (en) | 1987-06-26 |
| JPH0426915Y2 JPH0426915Y2 (en) | 1992-06-29 |
Family
ID=31149351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19338185U Expired JPH0426915Y2 (en) | 1985-12-16 | 1985-12-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0426915Y2 (en) |
-
1985
- 1985-12-16 JP JP19338185U patent/JPH0426915Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0426915Y2 (en) | 1992-06-29 |