JPS5542354A - Diagnostic system for memory unit - Google Patents
Diagnostic system for memory unitInfo
- Publication number
- JPS5542354A JPS5542354A JP11564578A JP11564578A JPS5542354A JP S5542354 A JPS5542354 A JP S5542354A JP 11564578 A JP11564578 A JP 11564578A JP 11564578 A JP11564578 A JP 11564578A JP S5542354 A JPS5542354 A JP S5542354A
- Authority
- JP
- Japan
- Prior art keywords
- write
- write data
- registers
- data
- memory unit
- 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
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE: To detect definitely the malfunction of an address system by sequentially storing assigned addresses and write data in several address registers and write data registers.
CONSTITUTION: Write operation is repeated n times to write write data WD1WWDn in memory regions of a memory unit assigned by addresses A1WAn and at the point in time when the operation ends, addresses A1WAn are stored in address registers AR1-nWAR1-1 while write data WD1WWDn are stored in write registers WDR2-nWWDR2-1. Next, data are read out in sequence from the memory unit on the basis of the contents of AR1-nWAR1-1 and comparator 7 makes comparisons between read data and write data and sends an error signal in case of a dissidence. Consequently, malfunction of the address system can accurately be detected without fail.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11564578A JPS5542354A (en) | 1978-09-20 | 1978-09-20 | Diagnostic system for memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11564578A JPS5542354A (en) | 1978-09-20 | 1978-09-20 | Diagnostic system for memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5542354A true JPS5542354A (en) | 1980-03-25 |
Family
ID=14667763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11564578A Pending JPS5542354A (en) | 1978-09-20 | 1978-09-20 | Diagnostic system for memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5542354A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5826400A (en) * | 1981-08-07 | 1983-02-16 | Nec Corp | Storage element with storage check function |
JPS5853094A (en) * | 1981-09-24 | 1983-03-29 | Fujitsu Ltd | Test method for storage device |
-
1978
- 1978-09-20 JP JP11564578A patent/JPS5542354A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5826400A (en) * | 1981-08-07 | 1983-02-16 | Nec Corp | Storage element with storage check function |
JPS5853094A (en) * | 1981-09-24 | 1983-03-29 | Fujitsu Ltd | Test method for storage device |
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