JPH03113439U - - Google Patents
Info
- Publication number
- JPH03113439U JPH03113439U JP2198690U JP2198690U JPH03113439U JP H03113439 U JPH03113439 U JP H03113439U JP 2198690 U JP2198690 U JP 2198690U JP 2198690 U JP2198690 U JP 2198690U JP H03113439 U JPH03113439 U JP H03113439U
- Authority
- JP
- Japan
- Prior art keywords
- microcomputer
- internal data
- readout circuit
- bus
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 238000000034 method Methods 0.000 claims 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 230000005856 abnormality Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
Landscapes
- Debugging And Monitoring (AREA)
Description
第1図は本考案の一実施例を内蔵するコンピユ
ータ・システムの電気回路ブロツク図、第2図は
暴走監視回路のデコード機能説明図、をそれぞれ
示している。
10……CPU、20……ROM、30……R
AM、40a,40b〜40n……入出力外部機
器、50……入出力インターフエイス、60a…
…アドレスバス、60b……データバス、60c
……コントロールバス、70……暴走監視回路。
FIG. 1 shows an electric circuit block diagram of a computer system incorporating an embodiment of the present invention, and FIG. 2 shows an explanatory diagram of a decoding function of a runaway monitoring circuit. 10...CPU, 20...ROM, 30...R
AM, 40a, 40b to 40n...Input/output external device, 50...Input/output interface, 60a...
...Address bus, 60b...Data bus, 60c
...Control bus, 70...Runaway monitoring circuit.
Claims (1)
ドが実行されることにより、該マイクロコンピユ
ータが所定の手順から遊離した無作為の動作モー
ドとなる暴走状態に陥つたことを検出するマイク
ロコンピユータの暴走検出回路において、 前記マイクロコンピユータのアドレスバス、デ
ータバス及びコントロールバスに存在する内部デ
ータを読み出す内部データ読み出し回路と、 該内部データ読み出し回路の読み出した内部デ
ータと前記マイクロコンピユータの実行すべき所
定の手順に基づき決定された基準データとを比較
し、前記内部データの異常を判断する異常判断回
路と、 を備えたことを特徴とするマイクロコンピユータ
の暴走検出回路。[Claims for Utility Model Registration] A microcomputer that detects when an incorrect command is executed in a microcomputer, causing the microcomputer to run away from a predetermined procedure and enter a random operating mode. The runaway detection circuit includes: an internal data readout circuit that reads internal data present in an address bus, a data bus, and a control bus of the microcomputer; and an internal data readout circuit that reads internal data that is read by the internal data readout circuit and a predetermined command to be executed by the microcomputer. A runaway detection circuit for a microcomputer, comprising: an abnormality determination circuit that compares the internal data with reference data determined based on the procedure and determines whether the internal data is abnormal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2198690U JPH03113439U (en) | 1990-03-05 | 1990-03-05 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2198690U JPH03113439U (en) | 1990-03-05 | 1990-03-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03113439U true JPH03113439U (en) | 1991-11-20 |
Family
ID=31525014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2198690U Pending JPH03113439U (en) | 1990-03-05 | 1990-03-05 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03113439U (en) |
-
1990
- 1990-03-05 JP JP2198690U patent/JPH03113439U/ja active Pending
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