JPS55153196A - Semiconductor memory - Google Patents
Semiconductor memoryInfo
- Publication number
- JPS55153196A JPS55153196A JP5890479A JP5890479A JPS55153196A JP S55153196 A JPS55153196 A JP S55153196A JP 5890479 A JP5890479 A JP 5890479A JP 5890479 A JP5890479 A JP 5890479A JP S55153196 A JPS55153196 A JP S55153196A
- Authority
- JP
- Japan
- Prior art keywords
- timing
- refresh
- outputs
- cm6b
- rma5a
- 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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- For Increasing The Reliability Of Semiconductor Memories (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE:To prevent error information due to software from being stored by reading, checking, correcting and rewriting the contents of all MOS dynamic memory elements within a certain time. CONSTITUTION:On arrival of an external refresh request, timing generating circuit 1 outputs a series of timing signals 1A-1D. At timing 1A, refresh counter 2 outputs refresh addresses RA3A and RA3B of low-order bits and high-order bits. At timing 1B, decoder 4 outputs refresh memory address RMA5A and check memory address CMA5B. At timing 1C, refresh bit group RM6A in memory matrix 6 is selected on the basis of RMA5A and then refleshed. Then, CMA5B selects check bit group CM6B in RM6A. From CM6B, read data 7 are output and at timing 1D, error information detecting-correcting circuit 9 outputs rewrite data 8B to CM6B.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5890479A JPS55153196A (en) | 1979-05-14 | 1979-05-14 | Semiconductor memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5890479A JPS55153196A (en) | 1979-05-14 | 1979-05-14 | Semiconductor memory |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55153196A true JPS55153196A (en) | 1980-11-28 |
Family
ID=13097782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5890479A Pending JPS55153196A (en) | 1979-05-14 | 1979-05-14 | Semiconductor memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55153196A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61214298A (en) * | 1985-03-20 | 1986-09-24 | Toshiba Corp | Semiconductor memory with error correcting function |
JPS623498A (en) * | 1985-06-28 | 1987-01-09 | Mitsubishi Electric Corp | Semiconductor memory device with on-chip ecc circuit |
EP0424301A2 (en) * | 1989-10-18 | 1991-04-24 | International Business Machines Corporation | Overlapped data scrubbing with data refreshing |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52127036A (en) * | 1976-04-16 | 1977-10-25 | Mitsubishi Electric Corp | Diagnostic system |
-
1979
- 1979-05-14 JP JP5890479A patent/JPS55153196A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52127036A (en) * | 1976-04-16 | 1977-10-25 | Mitsubishi Electric Corp | Diagnostic system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61214298A (en) * | 1985-03-20 | 1986-09-24 | Toshiba Corp | Semiconductor memory with error correcting function |
JPS623498A (en) * | 1985-06-28 | 1987-01-09 | Mitsubishi Electric Corp | Semiconductor memory device with on-chip ecc circuit |
EP0424301A2 (en) * | 1989-10-18 | 1991-04-24 | International Business Machines Corporation | Overlapped data scrubbing with data refreshing |
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