JPS5786956A - Runaway stopping system of microcomputer - Google Patents
Runaway stopping system of microcomputerInfo
- Publication number
- JPS5786956A JPS5786956A JP55161918A JP16191880A JPS5786956A JP S5786956 A JPS5786956 A JP S5786956A JP 55161918 A JP55161918 A JP 55161918A JP 16191880 A JP16191880 A JP 16191880A JP S5786956 A JPS5786956 A JP S5786956A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- level
- runaway
- microcomputer
- computer
- 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0751—Error or fault detection not based on redundancy
- G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
- G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Debugging And Monitoring (AREA)
Abstract
PURPOSE:To achieve initialization during a runaway by receiving a trigger pulse from a microcomputer, by outputting a pulse, which has longer width than that of the input pulse, from a pulse generator, and by connecting it to the reset terminal of the computer through a gate circuit. CONSTITUTION:When the power switch 2 of a microcomputer 1 is closed, a time constant circuit 3 consisting of a resistance (r), a capacitor (c), and a diode D rises to send a signal R having a level H to a reset terminal 5 through an NAND gate 4. Simultaneously, the computer 1 operates to send a trigger pulse T from an output terminal 6 to a pulse generator 7 such as a monostable multivibrator. Then, the generator 7 outputs a pulse M which has longer width than that of the pulse T, so the pulse M holds itself at the level H and the signal R falls down to a level L. If the pulse T is ceased owing to the runaway, etc., of the computer 1, the pulse M is inverted to the level L and the signal R rises up to the level H. Thus, initialization is performed in case of the runaway to restart the operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55161918A JPS5786956A (en) | 1980-11-19 | 1980-11-19 | Runaway stopping system of microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55161918A JPS5786956A (en) | 1980-11-19 | 1980-11-19 | Runaway stopping system of microcomputer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5786956A true JPS5786956A (en) | 1982-05-31 |
Family
ID=15744497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55161918A Pending JPS5786956A (en) | 1980-11-19 | 1980-11-19 | Runaway stopping system of microcomputer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5786956A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS596254U (en) * | 1982-06-30 | 1984-01-14 | 株式会社チノ− | reset circuit |
| JPS5949250U (en) * | 1982-09-22 | 1984-04-02 | 株式会社チノ− | Central processing unit reset circuit |
| JPS6133148U (en) * | 1984-07-30 | 1986-02-28 | ヤマト科学株式会社 | Software runaway monitoring circuit |
-
1980
- 1980-11-19 JP JP55161918A patent/JPS5786956A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS596254U (en) * | 1982-06-30 | 1984-01-14 | 株式会社チノ− | reset circuit |
| JPS5949250U (en) * | 1982-09-22 | 1984-04-02 | 株式会社チノ− | Central processing unit reset circuit |
| JPS6133148U (en) * | 1984-07-30 | 1986-02-28 | ヤマト科学株式会社 | Software runaway monitoring circuit |
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