JPS57134757A - Self-diagnosis system for microcomputer - Google Patents

Self-diagnosis system for microcomputer

Info

Publication number
JPS57134757A
JPS57134757A JP56019877A JP1987781A JPS57134757A JP S57134757 A JPS57134757 A JP S57134757A JP 56019877 A JP56019877 A JP 56019877A JP 1987781 A JP1987781 A JP 1987781A JP S57134757 A JPS57134757 A JP S57134757A
Authority
JP
Japan
Prior art keywords
pulse
output
outputted
period
microcomputer
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
JP56019877A
Other languages
Japanese (ja)
Inventor
Masahiro Watanabe
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56019877A priority Critical patent/JPS57134757A/en
Publication of JPS57134757A publication Critical patent/JPS57134757A/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

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 improve the response to failures, by providing a shift register which inputs a pulse train having a period within a prescribed range as clock and a watchdog pulse as a reset signal. CONSTITUTION:If the period of a pulse train is longer than an interruption routine execution time and no failure takes place in the operation of a microcomputer, one time watchdog timer pulse is outputted in one period of pulse train. A shift register 2 is reset with this pulse to obtain a pulse output with the same period as that of the inputted pulse train for Q1 output (output of the 1st stage). A Qn output (output of the final stage) is kept at 0 and no alarm signal is outputted. On the other hand, a microcomputer 1 runs away and no watchdog timer pulse is outputted, then the Q1 output is kept at 1 and the Qn alarm output 1 is outputted at the input of the (n-1)-th or the n-th pulse from the start of runaway.
JP56019877A 1981-02-12 1981-02-12 Self-diagnosis system for microcomputer Pending JPS57134757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56019877A JPS57134757A (en) 1981-02-12 1981-02-12 Self-diagnosis system for microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56019877A JPS57134757A (en) 1981-02-12 1981-02-12 Self-diagnosis system for microcomputer

Publications (1)

Publication Number Publication Date
JPS57134757A true JPS57134757A (en) 1982-08-20

Family

ID=12011433

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56019877A Pending JPS57134757A (en) 1981-02-12 1981-02-12 Self-diagnosis system for microcomputer

Country Status (1)

Country Link
JP (1) JPS57134757A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59223860A (en) * 1983-06-02 1984-12-15 Mitsubishi Electric Corp Fault diagnosis method of data processor
JPS60144841A (en) * 1984-01-09 1985-07-31 Yamatake Honeywell Co Ltd Monitor circuit of processor
JPS62157953A (en) * 1985-12-28 1987-07-13 Honda Motor Co Ltd Microcomputer provided with abnormality detecting function
JPH01140739A (en) * 1987-11-27 1989-06-01 Fuji Electric Co Ltd Wafer centering and positioning apparatus of semiconductor wafer transfer equipment
JPH01260550A (en) * 1988-04-12 1989-10-17 Victor Co Of Japan Ltd Microcomputer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129844A (en) * 1979-03-29 1980-10-08 Fujitsu Ltd Watch dog timer system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129844A (en) * 1979-03-29 1980-10-08 Fujitsu Ltd Watch dog timer system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59223860A (en) * 1983-06-02 1984-12-15 Mitsubishi Electric Corp Fault diagnosis method of data processor
JPS6342297B2 (en) * 1983-06-02 1988-08-23 Mitsubishi Electric Corp
JPS60144841A (en) * 1984-01-09 1985-07-31 Yamatake Honeywell Co Ltd Monitor circuit of processor
JPH0465410B2 (en) * 1984-01-09 1992-10-20 Yamatake Honeywell Co Ltd
JPS62157953A (en) * 1985-12-28 1987-07-13 Honda Motor Co Ltd Microcomputer provided with abnormality detecting function
JPH01140739A (en) * 1987-11-27 1989-06-01 Fuji Electric Co Ltd Wafer centering and positioning apparatus of semiconductor wafer transfer equipment
JPH0691151B2 (en) * 1987-11-27 1994-11-14 富士電機株式会社 Wafer centering positioning device for semiconductor wafer transfer equipment
JPH01260550A (en) * 1988-04-12 1989-10-17 Victor Co Of Japan Ltd Microcomputer

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