JPS54105437A - Memory fault detection system - Google Patents
Memory fault detection systemInfo
- Publication number
- JPS54105437A JPS54105437A JP1213378A JP1213378A JPS54105437A JP S54105437 A JPS54105437 A JP S54105437A JP 1213378 A JP1213378 A JP 1213378A JP 1213378 A JP1213378 A JP 1213378A JP S54105437 A JPS54105437 A JP S54105437A
- Authority
- JP
- Japan
- Prior art keywords
- time
- cycle
- disagreement
- collation
- memories
- 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)
- Hardware Redundancy (AREA)
Abstract
PURPOSE: To utilize a system for a time-division switchboard, etc., effectively by simplifying the constitution with no need of a method for timing by allowing a difference in time in writing and by identifying collation disagreement occurring during it not as a fault.
CONSTITUTION: Transmission line 1 transmitting a time-division-multiplied channel is connected to channel systems 2 and 3 constituted as channel shift switches. When the same address of address control memory 8 or 9 is supposed to be read out at a cycle of 125μs, a collation disagreement output is sent out from collator circuit 14 at a cycle of 125μs while contents of memories 8 and 9 are different. For the purpose, the difference in the write time between memories 8 and 9 is made less than a cycle of 125μs, so that the number of times of disagreement will be one and below. In case of a fault, on the other hand, collation disagreement occurs at every time when addresses are read out at a cycle of 125μs. To discriminate between faults of memories 8 and 9, fault information is outputted only when collation disagreement occurs again within 125μs after the occurrent of the 1st collation disagreement.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1213378A JPS54105437A (en) | 1978-02-06 | 1978-02-06 | Memory fault detection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1213378A JPS54105437A (en) | 1978-02-06 | 1978-02-06 | Memory fault detection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54105437A true JPS54105437A (en) | 1979-08-18 |
Family
ID=11797023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1213378A Pending JPS54105437A (en) | 1978-02-06 | 1978-02-06 | Memory fault detection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54105437A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5672359A (en) * | 1979-11-17 | 1981-06-16 | Fujitsu Ltd | Supervising system for spare unit |
JPS56169297A (en) * | 1980-05-31 | 1981-12-25 | Matsushita Electric Works Ltd | Memory backup device |
JPS5866168A (en) * | 1981-10-16 | 1983-04-20 | Meidensha Electric Mfg Co Ltd | Error data detection for operation of area value |
-
1978
- 1978-02-06 JP JP1213378A patent/JPS54105437A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5672359A (en) * | 1979-11-17 | 1981-06-16 | Fujitsu Ltd | Supervising system for spare unit |
JPS6256538B2 (en) * | 1979-11-17 | 1987-11-26 | Fujitsu Ltd | |
JPS56169297A (en) * | 1980-05-31 | 1981-12-25 | Matsushita Electric Works Ltd | Memory backup device |
JPS6144344B2 (en) * | 1980-05-31 | 1986-10-02 | Matsushita Electric Works Ltd | |
JPS5866168A (en) * | 1981-10-16 | 1983-04-20 | Meidensha Electric Mfg Co Ltd | Error data detection for operation of area value |
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