JPS648591A - Memory ic - Google Patents
Memory icInfo
- Publication number
- JPS648591A JPS648591A JP62164228A JP16422887A JPS648591A JP S648591 A JPS648591 A JP S648591A JP 62164228 A JP62164228 A JP 62164228A JP 16422887 A JP16422887 A JP 16422887A JP S648591 A JPS648591 A JP S648591A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- rom
- ram
- read
- address
- 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
- Static Random-Access Memory (AREA)
- Memory System (AREA)
- Semiconductor Memories (AREA)
- Dram (AREA)
Abstract
PURPOSE:To compactly mount the titled IC by combining a ROM and a RAM on the same chip and integrating the circuits. CONSTITUTION:An address line data line and control line are used in common by combining and integrating the read only memory (ROM) 5, a read/write memory (RAM) 4 and two circuits (memory) on the chip. An address enters as address input buffer 1, and an X decoder 2 and a Y decoder 3 access the RAM memory cell 4 and the ROM memory cell 5 and accessed data is outputted or inputted to and from a data input/output terminal through the input/output buffer 6. Moreover, a control signal for memory read or write from a host is controlled by a control circuit 7. Thus, compact mounting is attained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62164228A JPS648591A (en) | 1987-06-30 | 1987-06-30 | Memory ic |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62164228A JPS648591A (en) | 1987-06-30 | 1987-06-30 | Memory ic |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS648591A true JPS648591A (en) | 1989-01-12 |
Family
ID=15789105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62164228A Pending JPS648591A (en) | 1987-06-30 | 1987-06-30 | Memory ic |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS648591A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5526302A (en) * | 1993-05-31 | 1996-06-11 | Oki Electric Industry Co., Ltd. | Semiconductor memory device having volatile storage unit and non-volatile storage unit |
-
1987
- 1987-06-30 JP JP62164228A patent/JPS648591A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5663906A (en) * | 1993-05-13 | 1997-09-02 | Oki Electric Industry Co., Ltd. | Semiconductor memory device having volatile storage unit and non-volatile storage unit |
US5526302A (en) * | 1993-05-31 | 1996-06-11 | Oki Electric Industry Co., Ltd. | Semiconductor memory device having volatile storage unit and non-volatile storage unit |
US5544096A (en) * | 1993-05-31 | 1996-08-06 | Oki Electric Industry Co., Ltd. | Semiconductor memory device having volatile storage unit and non-volatile storage unit |
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