JPS57168351A - Malfunction preventing device of microprocessor - Google Patents

Malfunction preventing device of microprocessor

Info

Publication number
JPS57168351A
JPS57168351A JP56052912A JP5291281A JPS57168351A JP S57168351 A JPS57168351 A JP S57168351A JP 56052912 A JP56052912 A JP 56052912A JP 5291281 A JP5291281 A JP 5291281A JP S57168351 A JPS57168351 A JP S57168351A
Authority
JP
Japan
Prior art keywords
malfunction
circuit
cpu
electric power
power supply
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
JP56052912A
Other languages
Japanese (ja)
Inventor
Kaoru Seto
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56052912A priority Critical patent/JPS57168351A/en
Publication of JPS57168351A publication Critical patent/JPS57168351A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To prevent damage of various devices, its component parts, peripheral equipments, etc., by intercepting an electric power supply to a microprocessor, when a malfunction detecting circuit has detected a malfunction of the microprocessor within a prescribed time. CONSTITUTION:Electric power from a commerical AC power source 2 is supplied to a DC power supplying circuit 6 through an electric power supply switch 3 and a breaker 5 having a triple coil 4, and a constant-voltage output from its circuit 6 is supplied to a CPU 1. Also, as a malfunction preventive device of the CPU 1, a malfunction detecting circuit 10, a status displaying circuit 11 and a plate driving circuit 12 are provided. In this state, a program outputting a trigger signal for detecting a malfunction is stored in an ROM 7, and its trigger signal is supplied to the circuit 10. In this way, unless the trigger signal is generated within a prescribed time when the electric power supply has been turned to the CPU 1, it is detected that the CPU 1 is in a malfunction, and responding to its detecting output, the electric power supply to the CPU 1 is intercepted.
JP56052912A 1981-04-10 1981-04-10 Malfunction preventing device of microprocessor Pending JPS57168351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56052912A JPS57168351A (en) 1981-04-10 1981-04-10 Malfunction preventing device of microprocessor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56052912A JPS57168351A (en) 1981-04-10 1981-04-10 Malfunction preventing device of microprocessor

Publications (1)

Publication Number Publication Date
JPS57168351A true JPS57168351A (en) 1982-10-16

Family

ID=12928038

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56052912A Pending JPS57168351A (en) 1981-04-10 1981-04-10 Malfunction preventing device of microprocessor

Country Status (1)

Country Link
JP (1) JPS57168351A (en)

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