JPS6450132A - Watch dog timer - Google Patents
Watch dog timerInfo
- Publication number
- JPS6450132A JPS6450132A JP62206658A JP20665887A JPS6450132A JP S6450132 A JPS6450132 A JP S6450132A JP 62206658 A JP62206658 A JP 62206658A JP 20665887 A JP20665887 A JP 20665887A JP S6450132 A JPS6450132 A JP S6450132A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- inputted
- output
- watch dog
- dog timer
- 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
Landscapes
- Debugging And Monitoring (AREA)
- Multi Processors (AREA)
Abstract
PURPOSE:To suppress the increase of the hardware quantity, and to prevent the increase of a fault rate by monitoring plural information processors by one watch dog timer. CONSTITUTION:As for synchronizing signals 10, 11 generated from information processors 1, 2, its synchronizing state is deteriorated, when a fault is generated, and a watch dog timer 3 detects a faulty state thereby. FFs 301, 302 are set, when the signals 10, 11 are inputted to the respective terminals S, and an output is held in H. When a reset signal is inputted to the respective terminals R, said FFs are reset, and the output is held in L. When the reset signal 12 is inputted, a counter 303 is initialized, and starts time counting again. When the time counting value becomes higher than a prescribed value, the counter 303 sends out an overflow signal 13. When the signal 13 is inputted, and the output of the FF 301 is L, an AND circuit 305 sends out an abnormal signal 15, and when the signal 13 is inputted, and the output of the FF 302 is L, an AND circuit 306 sends out an abnormal signal 16.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62206658A JPS6450132A (en) | 1987-08-20 | 1987-08-20 | Watch dog timer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62206658A JPS6450132A (en) | 1987-08-20 | 1987-08-20 | Watch dog timer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6450132A true JPS6450132A (en) | 1989-02-27 |
Family
ID=16526995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62206658A Pending JPS6450132A (en) | 1987-08-20 | 1987-08-20 | Watch dog timer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6450132A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112018000271B4 (en) | 2017-01-20 | 2021-12-09 | Panasonic Intellectual Property Management Co., Ltd. | Imaging device |
-
1987
- 1987-08-20 JP JP62206658A patent/JPS6450132A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112018000271B4 (en) | 2017-01-20 | 2021-12-09 | Panasonic Intellectual Property Management Co., Ltd. | Imaging device |
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