JPS6467797A - Semiconductor memory device - Google Patents
Semiconductor memory deviceInfo
- Publication number
- JPS6467797A JPS6467797A JP22552987A JP22552987A JPS6467797A JP S6467797 A JPS6467797 A JP S6467797A JP 22552987 A JP22552987 A JP 22552987A JP 22552987 A JP22552987 A JP 22552987A JP S6467797 A JPS6467797 A JP S6467797A
- Authority
- JP
- Japan
- Prior art keywords
- data
- memory cell
- read
- dummy
- state
- 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
Landscapes
- Read Only Memory (AREA)
- For Increasing The Reliability Of Semiconductor Memories (AREA)
Abstract
PURPOSE:To measure data read speed without writing data in a memory cell by constituting the titled device so that data '0' is read out when a dummy row line is selected during the test mode, and data '1' is read when a row line connected to a memory cell is selected. CONSTITUTION:In addition to a memory cell array 7 constituted of nonvolatile memory cells which no electrons are injected to whose floating gate and are in a state that data '1' is stored, dummy cells set in a state equivalent to a state that data '0' is stored are provided to constitute a dummy cell array 10. The array 10 is selected by the second row decoder 11 during the test mode to measure the speed of data read. As a result, the data read speed can be accurately measured without programming in a regular memory cell array.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22552987A JPH07105147B2 (en) | 1987-09-09 | 1987-09-09 | Semiconductor memory device |
US07/241,748 US4967394A (en) | 1987-09-09 | 1988-09-08 | Semiconductor memory device having a test cell array |
EP19880114825 EP0306990A3 (en) | 1987-09-09 | 1988-09-09 | Semiconductor memory device with dummy cell array |
KR1019880011650A KR910007433B1 (en) | 1987-09-09 | 1988-09-09 | Semiconductor memora device with dummy cell array |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22552987A JPH07105147B2 (en) | 1987-09-09 | 1987-09-09 | Semiconductor memory device |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62306165A Division JPH0677399B2 (en) | 1987-09-09 | 1987-12-03 | Semiconductor memory device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6467797A true JPS6467797A (en) | 1989-03-14 |
JPH07105147B2 JPH07105147B2 (en) | 1995-11-13 |
Family
ID=16830732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22552987A Expired - Lifetime JPH07105147B2 (en) | 1987-09-09 | 1987-09-09 | Semiconductor memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07105147B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6059599A (en) * | 1983-09-13 | 1985-04-05 | Nec Corp | Non-volatile semiconductor memory |
-
1987
- 1987-09-09 JP JP22552987A patent/JPH07105147B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6059599A (en) * | 1983-09-13 | 1985-04-05 | Nec Corp | Non-volatile semiconductor memory |
Also Published As
Publication number | Publication date |
---|---|
JPH07105147B2 (en) | 1995-11-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |