JPS57152600A - Duplicating system of memory device - Google Patents
Duplicating system of memory deviceInfo
- Publication number
- JPS57152600A JPS57152600A JP56039197A JP3919781A JPS57152600A JP S57152600 A JPS57152600 A JP S57152600A JP 56039197 A JP56039197 A JP 56039197A JP 3919781 A JP3919781 A JP 3919781A JP S57152600 A JPS57152600 A JP S57152600A
- Authority
- JP
- Japan
- Prior art keywords
- memory unit
- normal area
- area
- normal
- access
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/70—Masking faults in memories by using spares or by reconfiguring
- G11C29/74—Masking faults in memories by using spares or by reconfiguring using duplex memories, i.e. using dual copies
Landscapes
- Techniques For Improving Reliability Of Storages (AREA)
- Hardware Redundancy (AREA)
Abstract
PURPOSE:To effectively use the storing space and, in the case of multi-processor, and to relief access concentration to one memory unit to improve the throughput of the system, by duplicating only a part of the storing space of the memory device. CONSTITUTION:A memory unit group which is composed of a memory unit MU1 partially containing a normal area H and another memory unit MU2 partially containing a copying area C which duplicates and stores information of the same content as the normal area H, and which can read and write independently, is installed. When a writing request is made to the normal area H, a steering circuit ST sends writing data which is the same as the address, to the memory unit MU2 containing the normal area H and the memory unit MU2 containing the copying area C which corresponds to the normal area H, respectively. Moreover, when an access request other than writing request at normal time is made, the access address and writing data are set only to the memory unit designated by the access address from the outside.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56039197A JPS57152600A (en) | 1981-03-18 | 1981-03-18 | Duplicating system of memory device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56039197A JPS57152600A (en) | 1981-03-18 | 1981-03-18 | Duplicating system of memory device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57152600A true JPS57152600A (en) | 1982-09-20 |
Family
ID=12546390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56039197A Pending JPS57152600A (en) | 1981-03-18 | 1981-03-18 | Duplicating system of memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57152600A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2773234A1 (en) * | 1997-12-31 | 1999-07-02 | Sgs Thomson Microelectronics | DUAL ACCESS MEMORY FOR DIGITAL SIGNAL PROCESSOR |
EP2347418A1 (en) * | 2008-10-28 | 2011-07-27 | Micron Technology, Inc. | Logical unit operation |
-
1981
- 1981-03-18 JP JP56039197A patent/JPS57152600A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2773234A1 (en) * | 1997-12-31 | 1999-07-02 | Sgs Thomson Microelectronics | DUAL ACCESS MEMORY FOR DIGITAL SIGNAL PROCESSOR |
EP0928002A1 (en) * | 1997-12-31 | 1999-07-07 | STMicroelectronics S.A. | Dual memory for digital signal processor |
US6564303B1 (en) | 1997-12-31 | 2003-05-13 | Stmicroelectronics S.A. | Dual port memory for digital signal processor |
EP2347418A1 (en) * | 2008-10-28 | 2011-07-27 | Micron Technology, Inc. | Logical unit operation |
EP2347418A4 (en) * | 2008-10-28 | 2012-10-31 | Micron Technology Inc | Logical unit operation |
US8762621B2 (en) | 2008-10-28 | 2014-06-24 | Micron Technology, Inc. | Logical unit operation |
US9128637B2 (en) | 2008-10-28 | 2015-09-08 | Micron Technology, Inc. | Logical unit operation |
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