JPH0292535U - - Google Patents
Info
- Publication number
- JPH0292535U JPH0292535U JP14589U JP14589U JPH0292535U JP H0292535 U JPH0292535 U JP H0292535U JP 14589 U JP14589 U JP 14589U JP 14589 U JP14589 U JP 14589U JP H0292535 U JPH0292535 U JP H0292535U
- Authority
- JP
- Japan
- Prior art keywords
- microprocessor
- signal
- reset
- supplying
- output
- 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
- 230000002265 prevention Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Debugging And Monitoring (AREA)
Description
第１図はこの考案に係るマイクロプロセツサの
暴走防止回路の一実施例を示すブロツク図、第２
図は第１図の動作を説明するための波形図、第３
図は従来のマイクロプロセツサの暴走防止回路の
一例を示すブロツク図である。
１０はマイクロプロセツサ、１１は出力回路、
１２は暴走検知回路、１６はリセツト発生回路。
FIG. 1 is a block diagram showing an embodiment of the microprocessor runaway prevention circuit according to this invention, and FIG.
The figure is a waveform diagram to explain the operation of figure 1,
The figure is a block diagram showing an example of a conventional microprocessor runaway prevention circuit. 10 is a microprocessor, 11 is an output circuit,
12 is a runaway detection circuit, and 16 is a reset generation circuit.
Claims (1)
定められた信号を供給して動作し、リセツト信号
が供給されることにより動作状態がリセツトされ
るマイクロプロセツサの暴走防止回路において、
該マイクロプロセツサから出力回路への出力線の
信号状態が予め設定された出力信号か否かを監視
する監視手段を設け、かつ前記設定状態と異なる
出力信号レベルが現われたとき前記マイクロプロ
セツサに対し、リセツト信号を供給するリセツト
発生手段を設けたことを特徴とするマイクロプロ
セツサの暴走防止回路。 In a runaway prevention circuit for a microprocessor, which operates by supplying a predetermined signal on an output signal line according to a predetermined program, and whose operating state is reset by supplying a reset signal,
A monitoring means is provided for monitoring whether the signal state of the output line from the microprocessor to the output circuit is a preset output signal, and when an output signal level different from the set state appears, the microprocessor is On the other hand, a runaway prevention circuit for a microprocessor is characterized in that it is provided with a reset generating means for supplying a reset signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14589U JPH0292535U (en) | 1989-01-06 | 1989-01-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14589U JPH0292535U (en) | 1989-01-06 | 1989-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0292535U true JPH0292535U (en) | 1990-07-23 |
Family
ID=31198914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14589U Pending JPH0292535U (en) | 1989-01-06 | 1989-01-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0292535U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008152544A (en) * | 2006-12-18 | 2008-07-03 | Hitachi Ltd | Verification device of control microcomputer and onboard control device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53148253A (en) * | 1977-05-30 | 1978-12-23 | Hitachi Ltd | Sequence check circuit |
| JPS61165159A (en) * | 1984-12-19 | 1986-07-25 | Fujitsu Ltd | Transition state checking circuit |
| JPS63123138A (en) * | 1986-11-12 | 1988-05-26 | Yamatake Honeywell Co Ltd | Detection circuit for out-of-control of microcomputer |
| JPS63136146A (en) * | 1986-11-26 | 1988-06-08 | Mitsubishi Electric Corp | Watchdog timer circuit |
-
1989
- 1989-01-06 JP JP14589U patent/JPH0292535U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53148253A (en) * | 1977-05-30 | 1978-12-23 | Hitachi Ltd | Sequence check circuit |
| JPS61165159A (en) * | 1984-12-19 | 1986-07-25 | Fujitsu Ltd | Transition state checking circuit |
| JPS63123138A (en) * | 1986-11-12 | 1988-05-26 | Yamatake Honeywell Co Ltd | Detection circuit for out-of-control of microcomputer |
| JPS63136146A (en) * | 1986-11-26 | 1988-06-08 | Mitsubishi Electric Corp | Watchdog timer circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008152544A (en) * | 2006-12-18 | 2008-07-03 | Hitachi Ltd | Verification device of control microcomputer and onboard control device |
| US7730354B2 (en) | 2006-12-18 | 2010-06-01 | Hitachi, Ltd. | Control microcomputer verification device and vehicle-mounted control device |
| JP4496205B2 (en) * | 2006-12-18 | 2010-07-07 | 日立オートモティブシステムズ株式会社 | Control microcomputer verification device and in-vehicle control device |
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