JPS5532110A - Check circuit for error correcting circuit - Google Patents

Check circuit for error correcting circuit

Info

Publication number
JPS5532110A
JPS5532110A JP10451878A JP10451878A JPS5532110A JP S5532110 A JPS5532110 A JP S5532110A JP 10451878 A JP10451878 A JP 10451878A JP 10451878 A JP10451878 A JP 10451878A JP S5532110 A JPS5532110 A JP S5532110A
Authority
JP
Japan
Prior art keywords
circuit
check
check bit
read
memory
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
JP10451878A
Other languages
Japanese (ja)
Inventor
Miyoshi Kikuchi
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 JP10451878A priority Critical patent/JPS5532110A/en
Publication of JPS5532110A publication Critical patent/JPS5532110A/en
Pending legal-status Critical Current

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  • Detection And Correction Of Errors (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To make it possible to check each error correcting circuit by comparing a check bit read from the memory with the check bit stored in the register.
CONSTITUTION: Write data WD based on test data SD and check data WDC corresponding to write data WD are written in the whole addresses of memory 1. After entering Data RD read from memory 1 into check circuit 2 and check bit PDC into inversion circuit 3, inverting the check bit on the basis of the output of control circuit 13 and generating artificial errors, the read data are rewritten. A series of the operation is repeated. After completing the operation twice, the contents of the whole addresses of memory 1 are read out one by one, the read check bit is compared with the check bit stored in register 11 in coincidence circuit 12 and then each error correcting circuit is checked on the basis of the output of coincidence circuit 12.
COPYRIGHT: (C)1980,JPO&Japio
JP10451878A 1978-08-28 1978-08-28 Check circuit for error correcting circuit Pending JPS5532110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10451878A JPS5532110A (en) 1978-08-28 1978-08-28 Check circuit for error correcting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10451878A JPS5532110A (en) 1978-08-28 1978-08-28 Check circuit for error correcting circuit

Publications (1)

Publication Number Publication Date
JPS5532110A true JPS5532110A (en) 1980-03-06

Family

ID=14382703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10451878A Pending JPS5532110A (en) 1978-08-28 1978-08-28 Check circuit for error correcting circuit

Country Status (1)

Country Link
JP (1) JPS5532110A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138099A (en) * 1981-02-18 1982-08-26 Nec Corp Information processor
JPS58207155A (en) * 1982-05-27 1983-12-02 Hitachi Ltd Diagnosing system of error correcting circuit
JPS5956852A (en) * 1982-09-25 1984-04-02 Toshiba Corp Insulating method for enclosure of coil
JPS61139857A (en) * 1984-12-12 1986-06-27 Fujitsu Ltd Inspection system for memory circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138099A (en) * 1981-02-18 1982-08-26 Nec Corp Information processor
JPS6232821B2 (en) * 1981-02-18 1987-07-16 Nippon Electric Co
JPS58207155A (en) * 1982-05-27 1983-12-02 Hitachi Ltd Diagnosing system of error correcting circuit
JPS5956852A (en) * 1982-09-25 1984-04-02 Toshiba Corp Insulating method for enclosure of coil
JPH0444503B2 (en) * 1982-09-25 1992-07-21 Tokyo Shibaura Electric Co
JPS61139857A (en) * 1984-12-12 1986-06-27 Fujitsu Ltd Inspection system for memory circuit

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