JPS5487439A - Error detection system of memory unit - Google Patents
Error detection system of memory unitInfo
- Publication number
- JPS5487439A JPS5487439A JP15623277A JP15623277A JPS5487439A JP S5487439 A JPS5487439 A JP S5487439A JP 15623277 A JP15623277 A JP 15623277A JP 15623277 A JP15623277 A JP 15623277A JP S5487439 A JPS5487439 A JP S5487439A
- Authority
- JP
- Japan
- Prior art keywords
- parity
- data
- elements
- bits
- outputs
- 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 improve an error detection rate by dividing the output of each semiconductor memory element into several groups and by leading respective groups to different parity check circuits.
CONSTITUTION: This system is provided with semiconductor memory elements 1-1 and 1-2 with several bit outputs and parity ckeck circuits 3-1 and 3-2, and the outputs of elements 1-1 and 1-2 are divided into bits A0 to A7 of data A and bits B0 to B7 of data B; parity generator 2-1 generates check bit PA for data A, and parity generator 2-2 parity bit PB for data B. Then, elements 1-1 and 1-2 are applied at the same time with the same address information AD0 to the information AD5, chip select signal CS, and read/write signal R/W. Next, outputs of elements 1-1 and 1-2 classified by groups are supplied to different circuits 3-1 and 3-2, where comparison of parity bits is done, and an error signal is outputted.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15623277A JPS5487439A (en) | 1977-12-23 | 1977-12-23 | Error detection system of memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15623277A JPS5487439A (en) | 1977-12-23 | 1977-12-23 | Error detection system of memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5487439A true JPS5487439A (en) | 1979-07-11 |
Family
ID=15623247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15623277A Pending JPS5487439A (en) | 1977-12-23 | 1977-12-23 | Error detection system of memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5487439A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50118633A (en) * | 1973-12-27 | 1975-09-17 |
-
1977
- 1977-12-23 JP JP15623277A patent/JPS5487439A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50118633A (en) * | 1973-12-27 | 1975-09-17 |
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