JPS6432496A - Read-only memory - Google Patents

Read-only memory

Info

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
Application number
JP18794887A
Other languages
Japanese (ja)
Inventor
Tsunenori Umeki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP18794887A priority Critical patent/JPS6432496A/en
Priority to US07/194,707 priority patent/US4931999A/en
Publication of JPS6432496A publication Critical patent/JPS6432496A/en
Pending legal-status Critical Current

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  • 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.
JP18794887A 1987-07-27 1987-07-27 Read-only memory Pending JPS6432496A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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