JPS61131135A - Runway detector of microprocessor - Google Patents

Runway detector of microprocessor

Info

Publication number
JPS61131135A
JPS61131135A JP59253069A JP25306984A JPS61131135A JP S61131135 A JPS61131135 A JP S61131135A JP 59253069 A JP59253069 A JP 59253069A JP 25306984 A JP25306984 A JP 25306984A JP S61131135 A JPS61131135 A JP S61131135A
Authority
JP
Japan
Prior art keywords
signal
microprocessor
processor
ale
int
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
JP59253069A
Other languages
Japanese (ja)
Inventor
Atsushi Kikuchi
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.)
Toshiba TEC Corp
Original Assignee
Tokyo Electric 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 Tokyo Electric Co Ltd filed Critical Tokyo Electric Co Ltd
Priority to JP59253069A priority Critical patent/JPS61131135A/en
Publication of JPS61131135A publication Critical patent/JPS61131135A/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 attain normal system operation by detecting a state that an output of an address latch enable signal is not given even after a prescribed time is elapsed by a runaway detection circuit so as to apply an interruption signal and an acknowledge signal to a microprocessor. CONSTITUTION:When the microprocessor 1 outputs an address data to a memory and an I/O port circuit section at accessing, the processor 1 also outputs an address latch enable signal (ALE). The signal ALE is outputted normally in a period of several mus several ms by a program, and if the signal ALE does not exist over a prescribed time longer the said period, a low level signal EACK is outputted. In this case, the interruption signal (INT) and the acknowledge signal ACK0 are fed to the processor 1. When the signal INT is applied, the processor 1 executes a runaway detection program to restore the system operation normally. When the signal ACK0 is inputted from an OR circuit 3, the busy state is released.
JP59253069A 1984-11-30 1984-11-30 Runway detector of microprocessor Pending JPS61131135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59253069A JPS61131135A (en) 1984-11-30 1984-11-30 Runway detector of microprocessor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59253069A JPS61131135A (en) 1984-11-30 1984-11-30 Runway detector of microprocessor

Publications (1)

Publication Number Publication Date
JPS61131135A true JPS61131135A (en) 1986-06-18

Family

ID=17246055

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59253069A Pending JPS61131135A (en) 1984-11-30 1984-11-30 Runway detector of microprocessor

Country Status (1)

Country Link
JP (1) JPS61131135A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0216645A (en) * 1988-07-05 1990-01-19 Seikosha Co Ltd Abnormality detecting circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0216645A (en) * 1988-07-05 1990-01-19 Seikosha Co Ltd Abnormality detecting circuit

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