JPS57211652A - Data processing device - Google Patents

Data processing device

Info

Publication number
JPS57211652A
JPS57211652A JP56095948A JP9594881A JPS57211652A JP S57211652 A JPS57211652 A JP S57211652A JP 56095948 A JP56095948 A JP 56095948A JP 9594881 A JP9594881 A JP 9594881A JP S57211652 A JPS57211652 A JP S57211652A
Authority
JP
Japan
Prior art keywords
wcm2
timer
microprogram
transferred
storage device
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
JP56095948A
Other languages
Japanese (ja)
Inventor
Hisaharu Inayama
Koichi Koike
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP56095948A priority Critical patent/JPS57211652A/en
Publication of JPS57211652A publication Critical patent/JPS57211652A/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 detect an abnormal operation of the microprogram stored in a writable control storage device, by providing a timer which monitors the execution of microprogram control instructions stored in this storage device. CONSTITUTION:A read-only control storage device CM1 and a writable control storage device WCM2 are constituted in parallel with the output signal of an address generating circuit 3. In case that the processing is transferred from the device CM1 to the device WCM2, the processing is transferred to the device WCM2 after starting a timer 5 by a microprogram control instruction of the device CM1. When the timer 5 is reset periodically by microprogram control instructions stored in the device WCM2, the timer 5 detects overflow, and the processing is transferred from the device WCM2 to the device CM1. In this case, the operation of microprogram control instructions stored in storage devices is monitored by the timer 5.
JP56095948A 1981-06-23 1981-06-23 Data processing device Pending JPS57211652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56095948A JPS57211652A (en) 1981-06-23 1981-06-23 Data processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56095948A JPS57211652A (en) 1981-06-23 1981-06-23 Data processing device

Publications (1)

Publication Number Publication Date
JPS57211652A true JPS57211652A (en) 1982-12-25

Family

ID=14151476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56095948A Pending JPS57211652A (en) 1981-06-23 1981-06-23 Data processing device

Country Status (1)

Country Link
JP (1) JPS57211652A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61296443A (en) * 1985-06-24 1986-12-27 Mitsubishi Electric Corp Watchdog timer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61296443A (en) * 1985-06-24 1986-12-27 Mitsubishi Electric Corp Watchdog timer
JPH0519738B2 (en) * 1985-06-24 1993-03-17 Mitsubishi Electric Corp

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