JPS5532110A - Check circuit for error correcting circuit - Google Patents
Check circuit for error correcting circuitInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1978
- 1978-08-28 JP JP10451878A patent/JPS5532110A/en active Pending
Cited By (6)
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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