JPS6432496A - Read-only memory - Google Patents
Read-only memoryInfo
- Publication number
- JPS6432496A JPS6432496A JP18794887A JP18794887A JPS6432496A JP S6432496 A JPS6432496 A JP S6432496A JP 18794887 A JP18794887 A JP 18794887A JP 18794887 A JP18794887 A JP 18794887A JP S6432496 A JPS6432496 A JP S6432496A
- Authority
- JP
- Japan
- Prior art keywords
- column
- selector circuits
- column selector
- address
- word line
- 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.)
- Pending
Links
Landscapes
- Read Only Memory (AREA)
Abstract
PURPOSE:To improve the processing efficiency by extending the number of column selector circuits and extending the number of column address decoders in accordance with the number of column selector circuits. CONSTITUTION:Column selector circuits 4 and 6 are extended, and column address decoder 3 and 5 are added in accordance with column selector circuits. Since plural column selector circuits 4 and 6 are provided, data of (b) number of memory cells connected to a column word line is inputted to column selector circuits 4 and 6 at the time of selecting one word line in a memory cell array 1 by a column address decoder 2. Consequently, the address signal inputted to column address decoders 3 and 5 corresponding to column selector circuits 4 and 6 is changed to simultaneously select and output data different in address. Thus, the operation equivalent to quick access to a ROM is attained.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18794887A JPS6432496A (en) | 1987-07-27 | 1987-07-27 | Read-only memory |
US07/194,707 US4931999A (en) | 1987-07-27 | 1988-05-17 | Access circuit for a semiconductor memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18794887A JPS6432496A (en) | 1987-07-27 | 1987-07-27 | Read-only memory |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6432496A true JPS6432496A (en) | 1989-02-02 |
Family
ID=16214971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18794887A Pending JPS6432496A (en) | 1987-07-27 | 1987-07-27 | Read-only memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6432496A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58162951A (en) * | 1982-03-24 | 1983-09-27 | Dainippon Printing Co Ltd | Scanner trimming device |
JPH03213859A (en) * | 1990-06-29 | 1991-09-19 | Dainippon Printing Co Ltd | Trimming range setting device for image |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5534356A (en) * | 1978-08-31 | 1980-03-10 | Nec Corp | Memory device |
JPS5894193A (en) * | 1981-11-27 | 1983-06-04 | Ricoh Co Ltd | Read only memory |
JPS60201589A (en) * | 1984-03-22 | 1985-10-12 | Nec Corp | Integrated circuit |
JPS613599B2 (en) * | 1981-03-25 | 1986-02-03 | Daicel Chem | |
JPS61187197A (en) * | 1985-02-14 | 1986-08-20 | Nec Corp | Read only memory |
-
1987
- 1987-07-27 JP JP18794887A patent/JPS6432496A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5534356A (en) * | 1978-08-31 | 1980-03-10 | Nec Corp | Memory device |
JPS613599B2 (en) * | 1981-03-25 | 1986-02-03 | Daicel Chem | |
JPS5894193A (en) * | 1981-11-27 | 1983-06-04 | Ricoh Co Ltd | Read only memory |
JPS60201589A (en) * | 1984-03-22 | 1985-10-12 | Nec Corp | Integrated circuit |
JPS61187197A (en) * | 1985-02-14 | 1986-08-20 | Nec Corp | Read only memory |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58162951A (en) * | 1982-03-24 | 1983-09-27 | Dainippon Printing Co Ltd | Scanner trimming device |
JPH03213859A (en) * | 1990-06-29 | 1991-09-19 | Dainippon Printing Co Ltd | Trimming range setting device for image |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0398067A3 (en) | Combined multiple memories | |
GB2231984B (en) | Semiconductor memory device with redundant block | |
JPS563499A (en) | Semiconductor memory device | |
GB2129585B (en) | Memory system including a faulty rom array | |
EP0370308A3 (en) | Non-volatile semiconductor memory device having, at the prestage of an address decoder, a level shifter for generating a program voltage | |
JPS56137589A (en) | Semiconductor storage device | |
US4706219A (en) | Word length selectable memory | |
EP0256935A3 (en) | Read only memory device having memory cells each storing one of three states | |
EP0272980A3 (en) | Boundary-free semiconductor memory device | |
JPS56111194A (en) | Semiconductor memory | |
TW336294B (en) | Semiconductor memory device and access method for the same | |
DE3480443D1 (en) | Semiconductor memory | |
JPS54139343A (en) | Clock-system memory | |
JPS6432496A (en) | Read-only memory | |
EP0337457A3 (en) | Memory device having a plurality of memory cell arrays with different organization | |
JPS5466042A (en) | Programable read-only memory | |
JPS5552593A (en) | Memory unit | |
CA2355737A1 (en) | Device and method for determining maximum likelihood state in a decoding device | |
JPS56159897A (en) | Read-only memory | |
JPS57208694A (en) | Switching system of storage cell array | |
KR960036055A (en) | Semiconductor memory | |
JPS5694588A (en) | Read only memory | |
JPS6432487A (en) | Random access memory | |
CA2428982A1 (en) | Boundary addressable memory | |
JPS555542A (en) | Rewritable program logic array |