JPS57113497A - Error correction system - Google Patents

Error correction system

Info

Publication number
JPS57113497A
JPS57113497A JP55189116A JP18911680A JPS57113497A JP S57113497 A JPS57113497 A JP S57113497A JP 55189116 A JP55189116 A JP 55189116A JP 18911680 A JP18911680 A JP 18911680A JP S57113497 A JPS57113497 A JP S57113497A
Authority
JP
Japan
Prior art keywords
error
read
cycle
circuit
detected
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
JP55189116A
Other languages
Japanese (ja)
Inventor
Masateru Tagami
Ryoji Miwa
Masaharu Kawakami
Akihiro Takeuchi
Katsuhiko Yazawa
Akira Ikuta
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
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP55189116A priority Critical patent/JPS57113497A/en
Publication of JPS57113497A publication Critical patent/JPS57113497A/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)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Detection And Correction Of Errors (AREA)

Abstract

PURPOSE:To correct an error in the same cycle without delaying an access time, by extending a read-out cycle only in case when an eeor has been detected, and rewriting in its cycle. CONSTITUTION:As for a read-out data from a memory array 1, passing through a read-out register 4, whether an error exists or not is detected by an error detecting circuit 5 at the time of a read-out cycle. Subsequently, when a signal 31 which has detected an error is generated from the circuit 5, this signal 31 becomes a busy signal, and it read-out cycle is extended through a control part 3. In the same read-out cycle period which has been extended in this way, a data whose error has been corrected is rewritten in a memory 2 through an error correcting circuit 6, a write data register 7, an error correcting circuit 8, a write data switching circuit 9, etc. Accordingly, it is unnecessary to make allowance in advance for the correcting period at every read-out cycle, and an error is corrected in the same cycle without delaying an access time.
JP55189116A 1980-12-29 1980-12-29 Error correction system Pending JPS57113497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55189116A JPS57113497A (en) 1980-12-29 1980-12-29 Error correction system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55189116A JPS57113497A (en) 1980-12-29 1980-12-29 Error correction system

Publications (1)

Publication Number Publication Date
JPS57113497A true JPS57113497A (en) 1982-07-14

Family

ID=16235645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55189116A Pending JPS57113497A (en) 1980-12-29 1980-12-29 Error correction system

Country Status (1)

Country Link
JP (1) JPS57113497A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141743A2 (en) * 1983-11-07 1985-05-15 Digital Equipment Corporation Pipeline error correction
JPS6134634A (en) * 1984-07-26 1986-02-18 Seiko Epson Corp Parity error control device
JPS63298457A (en) * 1987-05-28 1988-12-06 Yokogawa Electric Corp Error detecting/correcting/recovering circuit
JPH01201735A (en) * 1988-02-08 1989-08-14 Yokogawa Electric Corp Microprocessor device
JP2007207481A (en) * 2006-01-31 2007-08-16 Chugoku Electric Power Co Inc:The Relay switch draw-out tool and relay switch draw-out device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141743A2 (en) * 1983-11-07 1985-05-15 Digital Equipment Corporation Pipeline error correction
JPS6134634A (en) * 1984-07-26 1986-02-18 Seiko Epson Corp Parity error control device
JPS63298457A (en) * 1987-05-28 1988-12-06 Yokogawa Electric Corp Error detecting/correcting/recovering circuit
JPH01201735A (en) * 1988-02-08 1989-08-14 Yokogawa Electric Corp Microprocessor device
JP2007207481A (en) * 2006-01-31 2007-08-16 Chugoku Electric Power Co Inc:The Relay switch draw-out tool and relay switch draw-out device

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