JPS5534302A - Memory device diagnostic system - Google Patents
Memory device diagnostic systemInfo
- Publication number
- JPS5534302A JPS5534302A JP10547678A JP10547678A JPS5534302A JP S5534302 A JPS5534302 A JP S5534302A JP 10547678 A JP10547678 A JP 10547678A JP 10547678 A JP10547678 A JP 10547678A JP S5534302 A JPS5534302 A JP S5534302A
- Authority
- JP
- Japan
- Prior art keywords
- memory device
- refresh
- examined
- period
- 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
- Techniques For Improving Reliability Of Storages (AREA)
- Debugging And Monitoring (AREA)
Abstract
PURPOSE: To program the select of refresh period of the memory device, and make variable the period of refresh by the refresh counter, thereby detect the obstacles such as deterioration due to the change as the time passing in the memory device.
CONSTITUTION: In the memory device diagnosis device comprising a memory device 1 to be examined, and a refresh counter 21, and provided with a memory control device 2 and an diagnosis control device 7 for carrying out the controls such as access to the memory device 1 to be examined and refresh, a register 23 or a key is provided which can arbitrarily set the period of the refresh at times of integer of a normal value in the memory control device every memory device to be examined and the period setting register 23 is rewritten by the diagnostic program through the diagnostic control device 7 and thereafter the diagnosis of the memory device to be examined is carried out.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10547678A JPS5534302A (en) | 1978-08-31 | 1978-08-31 | Memory device diagnostic system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10547678A JPS5534302A (en) | 1978-08-31 | 1978-08-31 | Memory device diagnostic system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5534302A true JPS5534302A (en) | 1980-03-10 |
Family
ID=14408638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10547678A Pending JPS5534302A (en) | 1978-08-31 | 1978-08-31 | Memory device diagnostic system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5534302A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100336838B1 (en) * | 1999-06-17 | 2002-05-16 | 윤종용 | Dynamic random access memory device with refresh period selecting circuit and input/output bit width selecting circuit |
JP2010157276A (en) * | 2008-12-26 | 2010-07-15 | Fujitsu Ltd | Device and method for detecting lifetime of memory |
-
1978
- 1978-08-31 JP JP10547678A patent/JPS5534302A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100336838B1 (en) * | 1999-06-17 | 2002-05-16 | 윤종용 | Dynamic random access memory device with refresh period selecting circuit and input/output bit width selecting circuit |
JP2010157276A (en) * | 2008-12-26 | 2010-07-15 | Fujitsu Ltd | Device and method for detecting lifetime of memory |
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