JPS55153199A - Diagnostic unit for memory unit - Google Patents
Diagnostic unit for memory unitInfo
- Publication number
- JPS55153199A JPS55153199A JP6074979A JP6074979A JPS55153199A JP S55153199 A JPS55153199 A JP S55153199A JP 6074979 A JP6074979 A JP 6074979A JP 6074979 A JP6074979 A JP 6074979A JP S55153199 A JPS55153199 A JP S55153199A
- Authority
- JP
- Japan
- Prior art keywords
- bits
- signal
- logic
- case
- time
- 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 shorten the time of diagnosis by making it possible to diagnose a data bit and check bit at a time.
CONSTITUTION: In case of diagnostic operation, diagnostic mode signal DS is set to "1". Next, eight bits of write register WDR are all set to "0" and check bit control signal WS is set to "0" before putting memory unit M' into write operation. Namely, "00000000" is written in memory circuit MM and "0" in memory circuit MC in this case. Next, eight bits of comparing data register N are all set to "0". At this time, error detection signal RS shows "0". Thus, the read operation is carried out. When eight bits of read data bits RD and all "0" and check bit RC is "0", error detecting circuit C' regards the logic of signal ES as nonerror logic in case that signal DS is "1". Next, eight bits of register WDR are all set to "1"; in case that signal WS is "1", the logic of signal ES is similarly regarded as nonerror logic when bits RD are all "1" and bit RC is "1".
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6074979A JPS55153199A (en) | 1979-05-17 | 1979-05-17 | Diagnostic unit for memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6074979A JPS55153199A (en) | 1979-05-17 | 1979-05-17 | Diagnostic unit for memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55153199A true JPS55153199A (en) | 1980-11-28 |
Family
ID=13151224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6074979A Pending JPS55153199A (en) | 1979-05-17 | 1979-05-17 | Diagnostic unit for memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55153199A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6470999A (en) * | 1987-05-15 | 1989-03-16 | Digital Equipment Corp | Method and apparatus for memory test |
JPH08263391A (en) * | 1995-03-22 | 1996-10-11 | Kofu Nippon Denki Kk | Information processor |
CN110703740A (en) * | 2019-10-28 | 2020-01-17 | 深圳市元征科技股份有限公司 | Automobile diagnosis data processing method and device and computer storage medium |
-
1979
- 1979-05-17 JP JP6074979A patent/JPS55153199A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6470999A (en) * | 1987-05-15 | 1989-03-16 | Digital Equipment Corp | Method and apparatus for memory test |
JPH08263391A (en) * | 1995-03-22 | 1996-10-11 | Kofu Nippon Denki Kk | Information processor |
CN110703740A (en) * | 2019-10-28 | 2020-01-17 | 深圳市元征科技股份有限公司 | Automobile diagnosis data processing method and device and computer storage medium |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5376713A (en) | Word wire fault detector | |
JPS55153199A (en) | Diagnostic unit for memory unit | |
JPS5637899A (en) | Memory malfunction detection system | |
JPS55163697A (en) | Memory device | |
JPS5694598A (en) | Memory error correction control system | |
JPS5376637A (en) | Diagnostic system of memory device only for reading | |
JPS5593596A (en) | Memory unit | |
JPS5532110A (en) | Check circuit for error correcting circuit | |
JPS5350813A (en) | Information memory device | |
JPS5634194A (en) | Memory unit | |
JPS554757A (en) | Error control system of memory unit | |
JPS5346235A (en) | Memory check system | |
JPS5583946A (en) | Diagnosis system for data error detection/correction circuit | |
SU1040526A1 (en) | Memory having self-check | |
JPS5542343A (en) | Control system for memory unit | |
GB1057162A (en) | Error detection | |
JPS5282153A (en) | Data check system for information processing unit | |
JPS5476118A (en) | Abnormality report system in magnetic face memory device | |
JPS5525868A (en) | Diagnostic system for control memory | |
JPS5447439A (en) | Memory unit | |
JPS5683900A (en) | Buffer recording device | |
JPS5677999A (en) | Ecc circuit diagnosing system for memory device | |
JPS54145445A (en) | Bubble memory unit | |
JPS5424612A (en) | Error detecting system of data memory device | |
JPS5798197A (en) | Multiplexing memory device |