JPS5698800A - Memory device - Google Patents
Memory deviceInfo
- Publication number
- JPS5698800A JPS5698800A JP147780A JP147780A JPS5698800A JP S5698800 A JPS5698800 A JP S5698800A JP 147780 A JP147780 A JP 147780A JP 147780 A JP147780 A JP 147780A JP S5698800 A JPS5698800 A JP S5698800A
- Authority
- JP
- Japan
- Prior art keywords
- address
- register
- data
- diagnostic
- memory element
- 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
Abstract
PURPOSE: To detect an error of an address system easily by fetching readout data from a memory element normally and by fetching and checking an address to which access is attained in a fault state.
CONSTITUTION: Diagnostic register 19 which can be set through soft-ware is provided and with its output, selecting circuit 21 for memory cards 11 is controlled to select data read out of memory element 12 or the output address of address buffer 14, thereby supplying it to data register 18. In a normal state, diagnostic register 19 is reset and selects the readout data of memory element 12. In a fault state, it enters into a diagnostic mode and set, and selecting circuit 21 transfers the address of address buffer 14 to readout register 18 for a check. Therefore, an error can be discriminated between a data system and address system, and while the diagnostic time is shortened, the fault estimation range can be reduced.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP147780A JPS5698800A (en) | 1980-01-09 | 1980-01-09 | Memory device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP147780A JPS5698800A (en) | 1980-01-09 | 1980-01-09 | Memory device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5698800A true JPS5698800A (en) | 1981-08-08 |
Family
ID=11502525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP147780A Pending JPS5698800A (en) | 1980-01-09 | 1980-01-09 | Memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5698800A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7306140B2 (en) | 2004-05-29 | 2007-12-11 | Samsung Electronics Co., Ltd. | Integrated circuit card system and method thereof |
-
1980
- 1980-01-09 JP JP147780A patent/JPS5698800A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7306140B2 (en) | 2004-05-29 | 2007-12-11 | Samsung Electronics Co., Ltd. | Integrated circuit card system and method thereof |
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