JPS61101857A - Memory error detecting correcting circuit - Google Patents
Memory error detecting correcting circuitInfo
- Publication number
- JPS61101857A JPS61101857A JP59222070A JP22207084A JPS61101857A JP S61101857 A JPS61101857 A JP S61101857A JP 59222070 A JP59222070 A JP 59222070A JP 22207084 A JP22207084 A JP 22207084A JP S61101857 A JPS61101857 A JP S61101857A
- Authority
- JP
- Japan
- Prior art keywords
- rom
- check bit
- bit
- memory
- error detecting
- 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
- 230000000875 corresponding Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
Abstract
PURPOSE: To modify the content of an ROM, to easily modify the check code for error correction and to simplify the circuit configuration by performing the check bit generation and the correction detection of the memory error by using the ROM.
CONSTITUTION: The information bit 14 from a CPU 11 is made an address data of a check bit generator ROM 12 and the content of the ROM 12 which the address represents is written in the ROM 12 beforehand so that it will be the data of a check bit 15. In this manner, the check bit 15 is generated. The check bit 15 and a data bit 14 from the CPU 11 are added to a memory 13. The information 14 read out from a memory 21 and a check bit 25 are added to a ROM for error detecting and correcting circuit 22, and a corrected information bit 26 and error correction flags 27 and 28 are outputted to a CPU 23. For each error detecting and correcting circuit and check bit generating circuit, a ROM in which expected output value corresponding to the input is written beforehand, is used respectively, and the content of said ROM is read out. In this way, the circuit configuration is simplified.
COPYRIGHT: (C)1986,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59222070A JPS61101857A (en) | 1984-10-24 | 1984-10-24 | Memory error detecting correcting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59222070A JPS61101857A (en) | 1984-10-24 | 1984-10-24 | Memory error detecting correcting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61101857A true JPS61101857A (en) | 1986-05-20 |
Family
ID=16776641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59222070A Pending JPS61101857A (en) | 1984-10-24 | 1984-10-24 | Memory error detecting correcting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61101857A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3936704A1 (en) * | 1988-11-04 | 1990-05-10 | Mitsubishi Electric Corp | Error-detecting cellular semiconductor memory with codeword generator - includes writing and read=out circuits for test data and stored codewords, integrated on same memory chip |
| EP0373941A2 (en) * | 1988-12-15 | 1990-06-20 | Shin-Etsu Chemical Co., Ltd. | Surface-modified polymethylsilsesquioxane spherical fine particles and process of preparing the same |
| US5262342A (en) * | 1988-11-04 | 1993-11-16 | Mitsubishi Denki Kabushiki Kaisha | Method of making a semiconductor memory device having error checking/correcting functions |
-
1984
- 1984-10-24 JP JP59222070A patent/JPS61101857A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3936704A1 (en) * | 1988-11-04 | 1990-05-10 | Mitsubishi Electric Corp | Error-detecting cellular semiconductor memory with codeword generator - includes writing and read=out circuits for test data and stored codewords, integrated on same memory chip |
| US5262342A (en) * | 1988-11-04 | 1993-11-16 | Mitsubishi Denki Kabushiki Kaisha | Method of making a semiconductor memory device having error checking/correcting functions |
| EP0373941A2 (en) * | 1988-12-15 | 1990-06-20 | Shin-Etsu Chemical Co., Ltd. | Surface-modified polymethylsilsesquioxane spherical fine particles and process of preparing the same |
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