JPS648589A - Semiconductor storage device - Google Patents
Semiconductor storage deviceInfo
- Publication number
- JPS648589A JPS648589A JP62164231A JP16423187A JPS648589A JP S648589 A JPS648589 A JP S648589A JP 62164231 A JP62164231 A JP 62164231A JP 16423187 A JP16423187 A JP 16423187A JP S648589 A JPS648589 A JP S648589A
- Authority
- JP
- Japan
- Prior art keywords
- data
- write
- time
- bit
- constitution
- 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
- For Increasing The Reliability Of Semiconductor Memories (AREA)
- Dram (AREA)
Abstract
PURPOSE:To improve the output of defect detection by utilizing an address input terminal not required after the change of constitution to generate write data. CONSTITUTION:A pattern generator 9 generates 4 kinds of data patterns by using input data from an input buffer 8 and data from a terminal receiving a column address C9 being a disuse terminal at the time of revision of internal constitution. R/W switches 3-1-3-4 write a bit corresponding to the data pattern at the time of write to memory cell arrays 1-1-1-4 and a test circuit 6. Then the test circuit 6 checks the identity of the bit written at the time of write to each bit read from the memory cell arrays 1-1-1-4 at the time of readout and gives the result to an output buffer 7. Thus, the bit defect detection capability by the test pattern is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62164231A JP2641867B2 (en) | 1987-06-30 | 1987-06-30 | Semiconductor storage device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62164231A JP2641867B2 (en) | 1987-06-30 | 1987-06-30 | Semiconductor storage device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS648589A true JPS648589A (en) | 1989-01-12 |
JP2641867B2 JP2641867B2 (en) | 1997-08-20 |
Family
ID=15789164
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62164231A Expired - Lifetime JP2641867B2 (en) | 1987-06-30 | 1987-06-30 | Semiconductor storage device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2641867B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59175094A (en) * | 1983-03-22 | 1984-10-03 | Mitsubishi Electric Corp | Semiconductor memory |
JPS60113167A (en) * | 1983-11-25 | 1985-06-19 | Hitachi Ltd | Pattern generating method |
-
1987
- 1987-06-30 JP JP62164231A patent/JP2641867B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59175094A (en) * | 1983-03-22 | 1984-10-03 | Mitsubishi Electric Corp | Semiconductor memory |
JPS60113167A (en) * | 1983-11-25 | 1985-06-19 | Hitachi Ltd | Pattern generating method |
Also Published As
Publication number | Publication date |
---|---|
JP2641867B2 (en) | 1997-08-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080502 Year of fee payment: 11 |