JPS6460899A - Random access memory - Google Patents
Random access memoryInfo
- Publication number
- JPS6460899A JPS6460899A JP62218884A JP21888487A JPS6460899A JP S6460899 A JPS6460899 A JP S6460899A JP 62218884 A JP62218884 A JP 62218884A JP 21888487 A JP21888487 A JP 21888487A JP S6460899 A JPS6460899 A JP S6460899A
- Authority
- JP
- Japan
- Prior art keywords
- error
- address
- correction
- hardware error
- coincidence
- 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
Abstract
PURPOSE:To realize selection where only a product in which no hardware error exists is designated as a qualified product, by holding a defective bit address on which error correction is applied by an on-chip ECC (error checking and correction) function, and outputting a signal to instruct the detection of the hardware error when two or more held address coincide with each other. CONSTITUTION:The address of a memory cell 1 on which the correction of data is applied by the on-chip ECC function of an error detecting and correcting means 8 corresponding to an access operation is held by an address holding means 10 sequentially, and those two or more addresses are compared at a coincidence detecting means 13. And when coincidence is obtained between them, namely, when correction is applied on the data in the same memory cell successively, the defective bit of the address is set as the hardware error, and a coincidence detecting signal as a hardware error detecting signal is generated from the coincidence detecting means 13. In such a way, it is possible to confirm the generation of the hardware error from the outside of a device, and to select the product in which no hardware error is generated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62218884A JPS6460899A (en) | 1987-08-31 | 1987-08-31 | Random access memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62218884A JPS6460899A (en) | 1987-08-31 | 1987-08-31 | Random access memory |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6460899A true JPS6460899A (en) | 1989-03-07 |
Family
ID=16726818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62218884A Pending JPS6460899A (en) | 1987-08-31 | 1987-08-31 | Random access memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6460899A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007052884A (en) * | 2005-08-19 | 2007-03-01 | Nec Corp | Semiconductor storage device |
US7851100B2 (en) | 2004-10-08 | 2010-12-14 | Panasonic Corporation | MEA-gasket assembly and polymer electrolyte fuel cell using same |
-
1987
- 1987-08-31 JP JP62218884A patent/JPS6460899A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7851100B2 (en) | 2004-10-08 | 2010-12-14 | Panasonic Corporation | MEA-gasket assembly and polymer electrolyte fuel cell using same |
JP2007052884A (en) * | 2005-08-19 | 2007-03-01 | Nec Corp | Semiconductor storage device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3587145D1 (en) | BUFFER SYSTEM WITH DETECTION OF READ OR WRITE CIRCUIT ERRORS. | |
JPS5637896A (en) | Error correction system | |
DE3689128D1 (en) | Semiconductor memory device with a correction function. | |
GB2201016B (en) | Memories and the testing thereof | |
US4884270A (en) | Easily cascadable and testable cache memory | |
JPS6460899A (en) | Random access memory | |
US5392294A (en) | Diagnostic tool and method for locating the origin of parasitic bit faults in a memory array | |
TR23714A (en) | MEASURES SUITABLE FOR THIS WASHING AND / OR RINSE OF TEXTILE MATERIALS | |
JPS56134397A (en) | Memory function check system for extended ram of electronic equipment | |
FR2613094A1 (en) | MEMORY REMAPPING IN A MICROCOMPUTER SYSTEM | |
JPS57203298A (en) | Semiconductor storage device | |
JPS5792498A (en) | Error detecting circuit of read-only memory system | |
JPS5798197A (en) | Multiplexing memory device | |
JPS5771599A (en) | Address error detection system | |
JPH06139153A (en) | Memory control system | |
SU972602A1 (en) | Storage unit testing device | |
JPS58196694A (en) | Storage device | |
JPS6217847A (en) | Scan-in system for parity formation | |
JPH0561777A (en) | Memory control circuit | |
JPS5727342A (en) | Error checking system for error detecting correcting circuit | |
JPS5677999A (en) | Ecc circuit diagnosing system for memory device | |
JPS56148798A (en) | Error detection system | |
JPS57100696A (en) | Test system for memory | |
JPS5619597A (en) | Diagnostic and processing system for memory unit | |
JPS6460897A (en) | Random access memory |