JPS55153199A - Diagnostic unit for memory unit - Google Patents

Diagnostic unit for memory unit

Info

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
Application number
JP6074979A
Other languages
Japanese (ja)
Inventor
Junichi Hiuga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6074979A priority Critical patent/JPS55153199A/en
Publication of JPS55153199A publication Critical patent/JPS55153199A/en
Pending legal-status Critical Current

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
JP6074979A 1979-05-17 1979-05-17 Diagnostic unit for memory unit Pending JPS55153199A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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

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