JPS5693191A - Memory error correction and automatic diagnosis system - Google Patents

Memory error correction and automatic diagnosis system

Info

Publication number
JPS5693191A
JPS5693191A JP16859179A JP16859179A JPS5693191A JP S5693191 A JPS5693191 A JP S5693191A JP 16859179 A JP16859179 A JP 16859179A JP 16859179 A JP16859179 A JP 16859179A JP S5693191 A JPS5693191 A JP S5693191A
Authority
JP
Japan
Prior art keywords
memory
register
error
writing
bit error
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
JP16859179A
Other languages
Japanese (ja)
Inventor
Yasunori Hiraoka
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 JP16859179A priority Critical patent/JPS5693191A/en
Publication of JPS5693191A publication Critical patent/JPS5693191A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To secure an effective correction at a multiplex bit error detection as well as a detection for the position of a faulty memory cell, by writing a fixed pattern into the address of a memory where the multiplex bit error is caused.
CONSTITUTION: A normal writing data is written into the memory 2 via the self- diagnosis control circuit 6 and the writing register 1. The reading data of the memory 2 is set to the reading register 3 via the input control circuit 11 and then checked by the ECC circuit 4. The patterns of all "0" and all "1" are written to the address of the memory 2 where an error is caused when the multiplex bit error is detected. Each of these patterns which is read out and inverted 23 and the contents of the register 3 are applied to exclusive logic sum 10 to correct the fixed faulst. At the same time, the position of the error bit is detected 4 to be informed to outside via the normal made/self-diagnosis mode switching circuit 5.
COPYRIGHT: (C)1981,JPO&Japio
JP16859179A 1979-12-25 1979-12-25 Memory error correction and automatic diagnosis system Pending JPS5693191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16859179A JPS5693191A (en) 1979-12-25 1979-12-25 Memory error correction and automatic diagnosis system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16859179A JPS5693191A (en) 1979-12-25 1979-12-25 Memory error correction and automatic diagnosis system

Publications (1)

Publication Number Publication Date
JPS5693191A true JPS5693191A (en) 1981-07-28

Family

ID=15870887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16859179A Pending JPS5693191A (en) 1979-12-25 1979-12-25 Memory error correction and automatic diagnosis system

Country Status (1)

Country Link
JP (1) JPS5693191A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8607120B2 (en) 2009-03-19 2013-12-10 Samsung Electronics Co., Ltd. Semiconductor memory device for performing additional ECC correction according to cell pattern and electronic system including the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8607120B2 (en) 2009-03-19 2013-12-10 Samsung Electronics Co., Ltd. Semiconductor memory device for performing additional ECC correction according to cell pattern and electronic system including the same

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