JPS57138089A - Check system for dynamic memory - Google Patents
Check system for dynamic memoryInfo
- Publication number
- JPS57138089A JPS57138089A JP56021493A JP2149381A JPS57138089A JP S57138089 A JPS57138089 A JP S57138089A JP 56021493 A JP56021493 A JP 56021493A JP 2149381 A JP2149381 A JP 2149381A JP S57138089 A JPS57138089 A JP S57138089A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- data
- time
- unit
- refresh
- 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
- Debugging And Monitoring (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE: To surely detect failures in refresh circuit sogether with the memory itself, by reading out the memory after a data storing time via a timer.
CONSTITUTION: When a check data is written in a dynamic RAM unit 23 providing a refresh memory via an ROM22 storing a process program and a CPU20, it is immediately read out and the presence of failure of the RAM23 is detected. The data written in the unit 23 with the CPU20 via a timer 27 the time of which is set more than the data storage time of the dynamic memory section of the unit 23 and which is set at the same time of the write-in, is read out, allowing to surely detect failures in the refresh memory.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56021493A JPS57138089A (en) | 1981-02-18 | 1981-02-18 | Check system for dynamic memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56021493A JPS57138089A (en) | 1981-02-18 | 1981-02-18 | Check system for dynamic memory |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57138089A true JPS57138089A (en) | 1982-08-26 |
Family
ID=12056491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56021493A Pending JPS57138089A (en) | 1981-02-18 | 1981-02-18 | Check system for dynamic memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57138089A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010157276A (en) * | 2008-12-26 | 2010-07-15 | Fujitsu Ltd | Device and method for detecting lifetime of memory |
-
1981
- 1981-02-18 JP JP56021493A patent/JPS57138089A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010157276A (en) * | 2008-12-26 | 2010-07-15 | Fujitsu Ltd | Device and method for detecting lifetime of memory |
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