JPS5641598A - Malfunction detecting circuit - Google Patents
Malfunction detecting circuitInfo
- Publication number
- JPS5641598A JPS5641598A JP11491279A JP11491279A JPS5641598A JP S5641598 A JPS5641598 A JP S5641598A JP 11491279 A JP11491279 A JP 11491279A JP 11491279 A JP11491279 A JP 11491279A JP S5641598 A JPS5641598 A JP S5641598A
- Authority
- JP
- Japan
- Prior art keywords
- address
- memory
- access
- shows
- output
- 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 secure the normalcy of a memory unit by detecting an address error in access to the memory.
CONSTITUTION: When entry address 11 of scratch pad memory 1 assigns (n) and access to address (n) of memory 1 is attained, scratch pad address memory 2 generates output 12 that shows (n). When address 11 assings (n), access to address 0, for example, due to a fault of the driving circuit results in that output 12 shows 0. Comparator 3, comparing address 11 to output 12, generates a signal that shows the normality when the both agree or the abnormality when not.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11491279A JPS5641598A (en) | 1979-09-07 | 1979-09-07 | Malfunction detecting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11491279A JPS5641598A (en) | 1979-09-07 | 1979-09-07 | Malfunction detecting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5641598A true JPS5641598A (en) | 1981-04-18 |
Family
ID=14649732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11491279A Pending JPS5641598A (en) | 1979-09-07 | 1979-09-07 | Malfunction detecting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5641598A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61163450A (en) * | 1985-01-16 | 1986-07-24 | Nec Corp | System for detecting malfunction of storage device |
JPH04137051A (en) * | 1990-09-28 | 1992-05-12 | Yamatake Honeywell Co Ltd | Communication system consisting of data memory device and data reader/writer |
-
1979
- 1979-09-07 JP JP11491279A patent/JPS5641598A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61163450A (en) * | 1985-01-16 | 1986-07-24 | Nec Corp | System for detecting malfunction of storage device |
JPH04137051A (en) * | 1990-09-28 | 1992-05-12 | Yamatake Honeywell Co Ltd | Communication system consisting of data memory device and data reader/writer |
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