JPS57147198A - Battery backup result judging system for volatile memory - Google Patents

Battery backup result judging system for volatile memory

Info

Publication number
JPS57147198A
JPS57147198A JP56032514A JP3251481A JPS57147198A JP S57147198 A JPS57147198 A JP S57147198A JP 56032514 A JP56032514 A JP 56032514A JP 3251481 A JP3251481 A JP 3251481A JP S57147198 A JPS57147198 A JP S57147198A
Authority
JP
Japan
Prior art keywords
volatile memory
data
detection signal
specific address
battery backup
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
JP56032514A
Other languages
Japanese (ja)
Inventor
Chuji Watabe
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 Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56032514A priority Critical patent/JPS57147198A/en
Publication of JPS57147198A publication Critical patent/JPS57147198A/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
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2015—Redundant power supplies

Abstract

PURPOSE:To prevent erroneous judgement due to the erroneous operation of an intermediate circuit by discriminating whether battery backup is performed normally or not by stored contents. CONSTITUTION:After breaking AC power supply 4, DC voltage supplied to each circuit in a CPU1 does not fall immediately to protect the electric power source and condensers in the circuits. A specific address of a volatile memory 2 is assigned to discriminate the backup result. When receiving a interruption detection signal, a memory data coincidence detector 8 writes data in the specific address of the volatile memory 2, reads out the from the specific address of the volatile memory 2 by a restore detection signal and compares the read data with a prescribed write data; when both the data are inconsistent, the circuit applies an error detection signal 9 to the CPU1.
JP56032514A 1981-03-09 1981-03-09 Battery backup result judging system for volatile memory Pending JPS57147198A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56032514A JPS57147198A (en) 1981-03-09 1981-03-09 Battery backup result judging system for volatile memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56032514A JPS57147198A (en) 1981-03-09 1981-03-09 Battery backup result judging system for volatile memory

Publications (1)

Publication Number Publication Date
JPS57147198A true JPS57147198A (en) 1982-09-10

Family

ID=12361077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56032514A Pending JPS57147198A (en) 1981-03-09 1981-03-09 Battery backup result judging system for volatile memory

Country Status (1)

Country Link
JP (1) JPS57147198A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60262229A (en) * 1984-06-08 1985-12-25 Fuji Electric Co Ltd Lifetime discriminating method of memory backup battery
US4979143A (en) * 1987-07-09 1990-12-18 Oki Electric Industry Co., Ltd. Recovery from power-down mode

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119637A (en) * 1977-03-28 1978-10-19 Nissin Electric Co Ltd Data checking system
JPS5562600A (en) * 1978-11-02 1980-05-12 Mitsubishi Electric Corp Availability decision method of power failure security in volatile semiconductor memory

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119637A (en) * 1977-03-28 1978-10-19 Nissin Electric Co Ltd Data checking system
JPS5562600A (en) * 1978-11-02 1980-05-12 Mitsubishi Electric Corp Availability decision method of power failure security in volatile semiconductor memory

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60262229A (en) * 1984-06-08 1985-12-25 Fuji Electric Co Ltd Lifetime discriminating method of memory backup battery
US4979143A (en) * 1987-07-09 1990-12-18 Oki Electric Industry Co., Ltd. Recovery from power-down mode

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