JPS5750397A - Memory circuit capable of production of error correction code and correction of error - Google Patents

Memory circuit capable of production of error correction code and correction of error

Info

Publication number
JPS5750397A
JPS5750397A JP55124876A JP12487680A JPS5750397A JP S5750397 A JPS5750397 A JP S5750397A JP 55124876 A JP55124876 A JP 55124876A JP 12487680 A JP12487680 A JP 12487680A JP S5750397 A JPS5750397 A JP S5750397A
Authority
JP
Japan
Prior art keywords
bits
stage
error
constitution
circuit
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
JP55124876A
Other languages
Japanese (ja)
Other versions
JPS6232823B2 (en
Inventor
Hidehiko Kobayashi
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 JP55124876A priority Critical patent/JPS5750397A/en
Publication of JPS5750397A publication Critical patent/JPS5750397A/en
Publication of JPS6232823B2 publication Critical patent/JPS6232823B2/ja
Granted 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

Abstract

PURPOSE:To simplify the constitution of a memory circuit without using a parity producing matrix, by reading out the check bits along with the information bits out of a memory and then delivering these bits directly or after a correction if necessary. CONSTITUTION:Information bits RD0-RD7 read out from a memory array which is reversed by an externally written data WD in the writing mode are designated through gate circuits 4- of the first stage to logical integral circuits 2- of the fourth stage having a 6-stage circuit constitution of a circuit which is capable of producing an error correction code and correcting errors. Then check bits RC0- RC3 read out from the memory array along withthe bits RD0-RD7 receive a reverse correction in accordance with the data WD and through exclusive OR circuits 1'- of the fifth stage. Furthermore, if a 1'-bit error exists in the bits RC0- RC3, the check bit is delivered through exclusive OR circuits 1- of the sixth stage after reversed according to syndromes S0-S3 and with no use of a parity producing matrix. Thus the constitution can be simplified for a circuit which is capable of producing an error correction code and correcting errors.
JP55124876A 1980-09-09 1980-09-09 Memory circuit capable of production of error correction code and correction of error Granted JPS5750397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55124876A JPS5750397A (en) 1980-09-09 1980-09-09 Memory circuit capable of production of error correction code and correction of error

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55124876A JPS5750397A (en) 1980-09-09 1980-09-09 Memory circuit capable of production of error correction code and correction of error

Publications (2)

Publication Number Publication Date
JPS5750397A true JPS5750397A (en) 1982-03-24
JPS6232823B2 JPS6232823B2 (en) 1987-07-16

Family

ID=14896275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55124876A Granted JPS5750397A (en) 1980-09-09 1980-09-09 Memory circuit capable of production of error correction code and correction of error

Country Status (1)

Country Link
JP (1) JPS5750397A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6458197A (en) * 1987-08-28 1989-03-06 Nippon Telegraph & Telephone Method for constituting line setting section

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5298434A (en) * 1976-02-14 1977-08-18 Hitachi Ltd Correction for memory error

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5298434A (en) * 1976-02-14 1977-08-18 Hitachi Ltd Correction for memory error

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6458197A (en) * 1987-08-28 1989-03-06 Nippon Telegraph & Telephone Method for constituting line setting section

Also Published As

Publication number Publication date
JPS6232823B2 (en) 1987-07-16

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