JPS56111199A - Periodical scanning control system in memory device - Google Patents

Periodical scanning control system in memory device

Info

Publication number
JPS56111199A
JPS56111199A JP1417480A JP1417480A JPS56111199A JP S56111199 A JPS56111199 A JP S56111199A JP 1417480 A JP1417480 A JP 1417480A JP 1417480 A JP1417480 A JP 1417480A JP S56111199 A JPS56111199 A JP S56111199A
Authority
JP
Japan
Prior art keywords
period
error
signal
periodic inspection
detection
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.)
Granted
Application number
JP1417480A
Other languages
Japanese (ja)
Other versions
JPS6022379B2 (en
Inventor
Shozo Taniguchi
Kiyokatsu Iijima
Takahiro Sakuraba
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55014174A priority Critical patent/JPS6022379B2/en
Publication of JPS56111199A publication Critical patent/JPS56111199A/en
Publication of JPS6022379B2 publication Critical patent/JPS6022379B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
    • G11C29/04—Detection or location of defective memory elements, e.g. cell constructio details, timing of test signals

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To enable the detection of error earlier without lowering the efficiency of information processing, by reducing the period of periodic inspection accompanied with error detection and returning the period through monitor to normal period after a given time. CONSTITUTION:The timing signal T1 with a given time interval is fed to a start signal generating circuit 2 via AND gate 9 and OR gate and also fed to an address counter 1 counting the address, allowing the periodic inspection of storage device at a given period. Further, with the error signal E with the production of error, the output of a NAND circuit 7 is inverted and FF4 is set to close and open the AND gates 9, 10. Thus, the timing signal T2 shorter in the time interval than the signal T1 is used in place of the signal T1 to reduce the period of periodic inspection. On the other hand, when the maximum count value of the counter 1 is counted at a maximum address calculation circuit 3, FF4 is reset via the circuit 3 to return the period to normal one, allowing to make earlier detection and processing of error without lowering the information processing efficiency.
JP55014174A 1980-02-07 1980-02-07 Periodic scan control method for storage devices Expired JPS6022379B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55014174A JPS6022379B2 (en) 1980-02-07 1980-02-07 Periodic scan control method for storage devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55014174A JPS6022379B2 (en) 1980-02-07 1980-02-07 Periodic scan control method for storage devices

Publications (2)

Publication Number Publication Date
JPS56111199A true JPS56111199A (en) 1981-09-02
JPS6022379B2 JPS6022379B2 (en) 1985-06-01

Family

ID=11853771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55014174A Expired JPS6022379B2 (en) 1980-02-07 1980-02-07 Periodic scan control method for storage devices

Country Status (1)

Country Link
JP (1) JPS6022379B2 (en)

Also Published As

Publication number Publication date
JPS6022379B2 (en) 1985-06-01

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