JPS5637899A - Memory malfunction detection system - Google Patents
Memory malfunction detection systemInfo
- Publication number
- JPS5637899A JPS5637899A JP11389979A JP11389979A JPS5637899A JP S5637899 A JPS5637899 A JP S5637899A JP 11389979 A JP11389979 A JP 11389979A JP 11389979 A JP11389979 A JP 11389979A JP S5637899 A JPS5637899 A JP S5637899A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- roma
- parity
- address
- 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.)
- Granted
Links
Landscapes
- Detection And Correction Of Errors (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE: To detect an error of an address selective matrix circuit by determining a parity bit in data write operation in connection with an address signal and by making a parity check in read operation in connection with the address signal.
CONSTITUTION: To exclusive-OR circuit 6, parity bit P2 added to address signal ROMA of ROM1 and parity bit P0 of data ROMDT written at an address part indicated by signal ROMA are transferred. Output signal P0 of circuit 6 obtained on the basis of those bits P0 and P2 and data signal RDT outputted from ROM1 on the basis of signal ROMA are supplied to check circuit 7 to make a parity check. Further, signal ROMA is checked in terms of parity by check circuit 3 with parity bit P2.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54113899A JPS607822B2 (en) | 1979-09-04 | 1979-09-04 | Memory malfunction detection method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54113899A JPS607822B2 (en) | 1979-09-04 | 1979-09-04 | Memory malfunction detection method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5637899A true JPS5637899A (en) | 1981-04-11 |
JPS607822B2 JPS607822B2 (en) | 1985-02-27 |
Family
ID=14623935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54113899A Expired JPS607822B2 (en) | 1979-09-04 | 1979-09-04 | Memory malfunction detection method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS607822B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61242822A (en) * | 1985-04-22 | 1986-10-29 | Mitsubishi Heavy Ind Ltd | Two-axial extruding machine |
JPH0225937A (en) * | 1988-07-14 | 1990-01-29 | Fujitsu Denso Ltd | Detecting system for cpu runaway |
JPH02100724A (en) * | 1988-10-07 | 1990-04-12 | Fujitsu Denso Ltd | Runaway detection system for microcomputer |
-
1979
- 1979-09-04 JP JP54113899A patent/JPS607822B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61242822A (en) * | 1985-04-22 | 1986-10-29 | Mitsubishi Heavy Ind Ltd | Two-axial extruding machine |
JPH0225937A (en) * | 1988-07-14 | 1990-01-29 | Fujitsu Denso Ltd | Detecting system for cpu runaway |
JPH02100724A (en) * | 1988-10-07 | 1990-04-12 | Fujitsu Denso Ltd | Runaway detection system for microcomputer |
Also Published As
Publication number | Publication date |
---|---|
JPS607822B2 (en) | 1985-02-27 |
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