JPS55157199A - Data protecting unit for power failure - Google Patents
Data protecting unit for power failureInfo
- Publication number
- JPS55157199A JPS55157199A JP6366579A JP6366579A JPS55157199A JP S55157199 A JPS55157199 A JP S55157199A JP 6366579 A JP6366579 A JP 6366579A JP 6366579 A JP6366579 A JP 6366579A JP S55157199 A JPS55157199 A JP S55157199A
- Authority
- JP
- Japan
- Prior art keywords
- check character
- power failure
- memory
- nonvolatile
- write
- 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.)
- Granted
Links
- 230000006378 damage Effects 0.000 abstract 2
- 230000001419 dependent effect Effects 0.000 abstract 2
Landscapes
- Read Only Memory (AREA)
- Non-Volatile Memory (AREA)
- For Increasing The Reliability Of Semiconductor Memories (AREA)
- Power Sources (AREA)
- Static Random-Access Memory (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
- Memory System (AREA)
Abstract
PURPOSE: To detect surely and rapidly errors dependent upon information destruction of a nonvolatile memory, by comparing a check character, which is stored in the memory, and the check character from a check character generator with each other just before erasing of the nonvolatile RAM for power failure.
CONSTITUTION: When an erasing signal is generated according to power failure occurrence, write contents of nonvolatile RAM14 are sent to a volatile RAM of high-speed read/write and are erased. Just before this erasing, the check character output by check character generator 15 for the information write into RAM14 through the volatile RAM is compared with the check character, which is stored in the check character area of the memory, in comparator 16. On a basis of this comparison result, errors dependent upon information destruction of the nonvolatile memory for power failure can be detected rapidly and surely.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6366579A JPS55157199A (en) | 1979-05-23 | 1979-05-23 | Data protecting unit for power failure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6366579A JPS55157199A (en) | 1979-05-23 | 1979-05-23 | Data protecting unit for power failure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55157199A true JPS55157199A (en) | 1980-12-06 |
JPS6218945B2 JPS6218945B2 (en) | 1987-04-25 |
Family
ID=13235859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6366579A Granted JPS55157199A (en) | 1979-05-23 | 1979-05-23 | Data protecting unit for power failure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55157199A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58174730U (en) * | 1982-05-14 | 1983-11-22 | 富士電機株式会社 | Vending machine control device |
JPS6372644U (en) * | 1986-10-24 | 1988-05-16 | ||
JP2001079248A (en) * | 1999-09-16 | 2001-03-27 | Okumura Yu-Ki Co Ltd | Pachinko machine |
-
1979
- 1979-05-23 JP JP6366579A patent/JPS55157199A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58174730U (en) * | 1982-05-14 | 1983-11-22 | 富士電機株式会社 | Vending machine control device |
JPS6372644U (en) * | 1986-10-24 | 1988-05-16 | ||
JP2001079248A (en) * | 1999-09-16 | 2001-03-27 | Okumura Yu-Ki Co Ltd | Pachinko machine |
Also Published As
Publication number | Publication date |
---|---|
JPS6218945B2 (en) | 1987-04-25 |
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