JPS55153196A - Semiconductor memory - Google Patents

Semiconductor memory

Info

Publication number
JPS55153196A
JPS55153196A JP5890479A JP5890479A JPS55153196A JP S55153196 A JPS55153196 A JP S55153196A JP 5890479 A JP5890479 A JP 5890479A JP 5890479 A JP5890479 A JP 5890479A JP S55153196 A JPS55153196 A JP S55153196A
Authority
JP
Japan
Prior art keywords
timing
refresh
outputs
cm6b
rma5a
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
JP5890479A
Other languages
Japanese (ja)
Inventor
Hiroaki Ikeda
Hiroshi 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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5890479A priority Critical patent/JPS55153196A/en
Publication of JPS55153196A publication Critical patent/JPS55153196A/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
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
    • 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
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To prevent error information due to software from being stored by reading, checking, correcting and rewriting the contents of all MOS dynamic memory elements within a certain time. CONSTITUTION:On arrival of an external refresh request, timing generating circuit 1 outputs a series of timing signals 1A-1D. At timing 1A, refresh counter 2 outputs refresh addresses RA3A and RA3B of low-order bits and high-order bits. At timing 1B, decoder 4 outputs refresh memory address RMA5A and check memory address CMA5B. At timing 1C, refresh bit group RM6A in memory matrix 6 is selected on the basis of RMA5A and then refleshed. Then, CMA5B selects check bit group CM6B in RM6A. From CM6B, read data 7 are output and at timing 1D, error information detecting-correcting circuit 9 outputs rewrite data 8B to CM6B.
JP5890479A 1979-05-14 1979-05-14 Semiconductor memory Pending JPS55153196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5890479A JPS55153196A (en) 1979-05-14 1979-05-14 Semiconductor memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5890479A JPS55153196A (en) 1979-05-14 1979-05-14 Semiconductor memory

Publications (1)

Publication Number Publication Date
JPS55153196A true JPS55153196A (en) 1980-11-28

Family

ID=13097782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5890479A Pending JPS55153196A (en) 1979-05-14 1979-05-14 Semiconductor memory

Country Status (1)

Country Link
JP (1) JPS55153196A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61214298A (en) * 1985-03-20 1986-09-24 Toshiba Corp Semiconductor memory with error correcting function
JPS623498A (en) * 1985-06-28 1987-01-09 Mitsubishi Electric Corp Semiconductor memory device with on-chip ecc circuit
EP0424301A2 (en) * 1989-10-18 1991-04-24 International Business Machines Corporation Overlapped data scrubbing with data refreshing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127036A (en) * 1976-04-16 1977-10-25 Mitsubishi Electric Corp Diagnostic system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127036A (en) * 1976-04-16 1977-10-25 Mitsubishi Electric Corp Diagnostic system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61214298A (en) * 1985-03-20 1986-09-24 Toshiba Corp Semiconductor memory with error correcting function
JPS623498A (en) * 1985-06-28 1987-01-09 Mitsubishi Electric Corp Semiconductor memory device with on-chip ecc circuit
EP0424301A2 (en) * 1989-10-18 1991-04-24 International Business Machines Corporation Overlapped data scrubbing with data refreshing

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