JPS56155457A - Correcting circuit for runaway of microprocessor - Google Patents

Correcting circuit for runaway of microprocessor

Info

Publication number
JPS56155457A
JPS56155457A JP5896080A JP5896080A JPS56155457A JP S56155457 A JPS56155457 A JP S56155457A JP 5896080 A JP5896080 A JP 5896080A JP 5896080 A JP5896080 A JP 5896080A JP S56155457 A JPS56155457 A JP S56155457A
Authority
JP
Japan
Prior art keywords
circuit
microprocessor
runaway
signal generating
reset signal
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
Application number
JP5896080A
Other languages
Japanese (ja)
Inventor
Kunio Masuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu General Ltd
Gen Co Ltd
Original Assignee
Fujitsu General Ltd
Gen Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu General Ltd, Gen Co Ltd filed Critical Fujitsu General Ltd
Priority to JP5896080A priority Critical patent/JPS56155457A/en
Publication of JPS56155457A publication Critical patent/JPS56155457A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To detect and correct runaway of the microprocessor rapidly, by providing a runaway detecting circuit and a reset signal generating circuit. CONSTITUTION:Signal line 2 for the pulse signal indicating that microprocessor 1 outputs effective addresses is connected to runaway detecting circuit 4 through buffer amplifier 3. Runaway detecting circuit 4 consists of differentiating circuit 7, one- shot multivibrator 11 equipped with time constant circuit 10 of a time constant sufficiently larger than the period of clock pulses of microprocessor 1, and integrating circuit 14. The output of runaway detecting circuit 4 is applied to reset signal generating circuit 16 through buffer amplifier 15. Reset signal generating circuit 16 consists of differentiating circuit 19, one-shot multivibrator 20 equipped with time constant circuit 23, and inverter 24. The output of reset signal generating circuit 16 is inputted to the reset input side of microprocessor 1.
JP5896080A 1980-05-02 1980-05-02 Correcting circuit for runaway of microprocessor Pending JPS56155457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5896080A JPS56155457A (en) 1980-05-02 1980-05-02 Correcting circuit for runaway of microprocessor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5896080A JPS56155457A (en) 1980-05-02 1980-05-02 Correcting circuit for runaway of microprocessor

Publications (1)

Publication Number Publication Date
JPS56155457A true JPS56155457A (en) 1981-12-01

Family

ID=13099400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5896080A Pending JPS56155457A (en) 1980-05-02 1980-05-02 Correcting circuit for runaway of microprocessor

Country Status (1)

Country Link
JP (1) JPS56155457A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4925783A (en) * 1972-07-05 1974-03-07
JPS5557956A (en) * 1978-10-25 1980-04-30 Nissan Motor Co Ltd Malfunction prevention unit of microcomputer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4925783A (en) * 1972-07-05 1974-03-07
JPS5557956A (en) * 1978-10-25 1980-04-30 Nissan Motor Co Ltd Malfunction prevention unit of microcomputer

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