JPS5671885A - Semiconductor memory - Google Patents
Semiconductor memoryInfo
- Publication number
- JPS5671885A JPS5671885A JP14805479A JP14805479A JPS5671885A JP S5671885 A JPS5671885 A JP S5671885A JP 14805479 A JP14805479 A JP 14805479A JP 14805479 A JP14805479 A JP 14805479A JP S5671885 A JPS5671885 A JP S5671885A
- Authority
- JP
- Japan
- Prior art keywords
- high level
- career
- prom
- write
- vcc
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/34—Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
- G11C16/349—Arrangements for evaluating degradation, retention or wearout, e.g. by counting erase cycles
- G11C16/3495—Circuits or methods to detect or delay wearout of nonvolatile EPROM or EEPROM memory devices, e.g. by counting numbers of erase or reprogram cycles, by using multiple memory areas serially or cyclically
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/34—Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
- G11C16/349—Arrangements for evaluating degradation, retention or wearout, e.g. by counting erase cycles
Landscapes
- Read Only Memory (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14805479A JPS5671885A (en) | 1979-11-15 | 1979-11-15 | Semiconductor memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14805479A JPS5671885A (en) | 1979-11-15 | 1979-11-15 | Semiconductor memory |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5671885A true JPS5671885A (en) | 1981-06-15 |
JPS639320B2 JPS639320B2 (ja) | 1988-02-26 |
Family
ID=15444121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14805479A Granted JPS5671885A (en) | 1979-11-15 | 1979-11-15 | Semiconductor memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5671885A (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58215794A (ja) * | 1982-06-08 | 1983-12-15 | Toshiba Corp | 不揮発性メモリ装置 |
JPS58215795A (ja) * | 1982-06-08 | 1983-12-15 | Toshiba Corp | 不揮発性メモリ装置 |
JPS6196598A (ja) * | 1984-10-17 | 1986-05-15 | Fuji Electric Co Ltd | 電気的消去可能なp−romのカウントデ−タ記憶方法 |
US5001332A (en) * | 1987-12-17 | 1991-03-19 | Siemens Aktiengesellschaft | Method and circuit for manipulation-proof devaluation of EEPROMS |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55165499U (ja) * | 1979-05-10 | 1980-11-28 |
-
1979
- 1979-11-15 JP JP14805479A patent/JPS5671885A/ja active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55165499U (ja) * | 1979-05-10 | 1980-11-28 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58215794A (ja) * | 1982-06-08 | 1983-12-15 | Toshiba Corp | 不揮発性メモリ装置 |
JPS58215795A (ja) * | 1982-06-08 | 1983-12-15 | Toshiba Corp | 不揮発性メモリ装置 |
JPH0552000B2 (ja) * | 1982-06-08 | 1993-08-04 | Tokyo Shibaura Electric Co | |
JPS6196598A (ja) * | 1984-10-17 | 1986-05-15 | Fuji Electric Co Ltd | 電気的消去可能なp−romのカウントデ−タ記憶方法 |
US5001332A (en) * | 1987-12-17 | 1991-03-19 | Siemens Aktiengesellschaft | Method and circuit for manipulation-proof devaluation of EEPROMS |
Also Published As
Publication number | Publication date |
---|---|
JPS639320B2 (ja) | 1988-02-26 |
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