JPS57198596A - Nonvolatile memory device - Google Patents
Nonvolatile memory deviceInfo
- Publication number
- JPS57198596A JPS57198596A JP57078238A JP7823882A JPS57198596A JP S57198596 A JPS57198596 A JP S57198596A JP 57078238 A JP57078238 A JP 57078238A JP 7823882 A JP7823882 A JP 7823882A JP S57198596 A JPS57198596 A JP S57198596A
- Authority
- JP
- Japan
- Prior art keywords
- loop
- information
- storage
- loops
- addresses
- 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
Abstract
PURPOSE: To read information in parallel, by allowing a storage loop to include a data storage loop and one, at least, auxiliary loop similar to the data storage loop.
CONSTITUTION: Proper optional information is written in one bit, for example, 21 out of idle bits which has the same address in each of all storage loops including a defective loop position storage loop 18 and a parity check loop 19, and the sum of written information gives a parity error. Information "111...1", information "000...0" or other information is used as this information; in short, only addresses 21 give a parity error. Addresses 21 are not accessed in the normal memory operation. In this mode, if the number of indefectible loops out of storage loops is higher than a prescribed value, it does not matter where defective loop exists.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57078238A JPS57198596A (en) | 1982-05-12 | 1982-05-12 | Nonvolatile memory device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57078238A JPS57198596A (en) | 1982-05-12 | 1982-05-12 | Nonvolatile memory device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57198596A true JPS57198596A (en) | 1982-12-06 |
JPS6118277B2 JPS6118277B2 (en) | 1986-05-12 |
Family
ID=13656448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57078238A Granted JPS57198596A (en) | 1982-05-12 | 1982-05-12 | Nonvolatile memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57198596A (en) |
-
1982
- 1982-05-12 JP JP57078238A patent/JPS57198596A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6118277B2 (en) | 1986-05-12 |
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