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
- Semiconductor Memories (AREA)
- Dram (AREA)
- Static Random-Access Memory (AREA)
- Memory System (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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TW280028B (en) | Integrated circuit memory | |
TW337046B (en) | Semiconductor memory and the memory system | |
EP0434901A3 (en) | A memory module utilizing partially defective memory chips | |
DE69628196D1 (en) | DEVICE AND METHOD FOR SWITCHING ON A FUNCTION IN A MEMORY MODULE | |
EP0554053A3 (en) | A semiconductor memory with a multiplexer for selecting an output for a redundant memory access | |
KR850003610A (en) | Semiconductor memory device | |
EP0401521A3 (en) | Semiconductor memory device | |
EP0362050A3 (en) | Memory card | |
US5446859A (en) | Register addressing control circuit including a decoder and an index register | |
EP0123896A3 (en) | Character and video mode control circuit | |
EP0358300A3 (en) | Extended input/output circuit board addressing system | |
JPS648591A (en) | Memory ic | |
ATE67892T1 (en) | INTEGRATED SEMICONDUCTOR MEMORY. | |
TW226468B (en) | ||
JPS54134934A (en) | Semiconductor memory device | |
CA2062562A1 (en) | Switch coupled between input and output ports in communication system | |
JPS5787288A (en) | Video signal processing device | |
JPS57103187A (en) | Semiconductor storage element | |
EP0029304A3 (en) | Bubble memory device | |
JPS55135960A (en) | Micro-computer | |
JPS55102046A (en) | Logic circuit | |
JPS57133588A (en) | Storage device of integrated circuit | |
JPS6450137A (en) | Memory circuit | |
JPS6470993A (en) | Dual port ram | |
JPS57111474A (en) | Test system for memory printed board |