JPH0267658A - Method for diagnosing fault in non-volatile memory - Google Patents

Method for diagnosing fault in non-volatile memory

Info

Publication number
JPH0267658A
JPH0267658A JP63219906A JP21990688A JPH0267658A JP H0267658 A JPH0267658 A JP H0267658A JP 63219906 A JP63219906 A JP 63219906A JP 21990688 A JP21990688 A JP 21990688A JP H0267658 A JPH0267658 A JP H0267658A
Authority
JP
Japan
Prior art keywords
memory
fault
bits
diagnosing
volatile memory
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
JP63219906A
Other languages
Japanese (ja)
Inventor
Hirobumi Higashida
Original Assignee
Fujitsu Ten Ltd
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 Fujitsu Ten Ltd filed Critical Fujitsu Ten Ltd
Priority to JP63219906A priority Critical patent/JPH0267658A/en
Publication of JPH0267658A publication Critical patent/JPH0267658A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the fault detecting accuracy of a memory by initializing only a controlling storage area when abnormality is generated in the storage format of a memory and holding the stored contents of a fault diagnosing storage area in that condition.
CONSTITUTION: In a controller 1, fault diagnosing bits A5 to A7 and B5 to B7 for the memory 10 are respectively arranged in the storage areas A, B of the memory 10. At the time of generating abnormality in the storage format of the memory 10, only the residual control bits A0 to A4 and B0 to B4 and are set up and the contents of fault diagnosing bits A5 to A7 and B5 to B7 are held in their condition. Consequently, history of fault generation such as RAM formation can be left in the memory 10 without troubling the control operation of the controller 1 and a fault in the memory 10 can be rapidly detected.
COPYRIGHT: (C)1990,JPO&Japio
JP63219906A 1988-09-01 1988-09-01 Method for diagnosing fault in non-volatile memory Pending JPH0267658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63219906A JPH0267658A (en) 1988-09-01 1988-09-01 Method for diagnosing fault in non-volatile memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63219906A JPH0267658A (en) 1988-09-01 1988-09-01 Method for diagnosing fault in non-volatile memory

Publications (1)

Publication Number Publication Date
JPH0267658A true JPH0267658A (en) 1990-03-07

Family

ID=16742883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63219906A Pending JPH0267658A (en) 1988-09-01 1988-09-01 Method for diagnosing fault in non-volatile memory

Country Status (1)

Country Link
JP (1) JPH0267658A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8849504B2 (en) 2006-02-03 2014-09-30 Denso Corporation Electronic control apparatus for vehicles

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS554703A (en) * 1978-06-21 1980-01-14 Toshiba Corp Main memory control system
JPS59148954A (en) * 1983-02-14 1984-08-25 Fujitsu Ltd Patrolling system of control storage
JPS603732A (en) * 1983-06-21 1985-01-10 Honda Motor Co Ltd Detection for abnormality of input and output device
JPS60114949A (en) * 1983-11-28 1985-06-21 Toshiba Corp Storage device
JPS61166654A (en) * 1985-01-19 1986-07-28 Panafacom Ltd Memory patrol diagnosis system
JPS61234401A (en) * 1985-04-11 1986-10-18 Nippon Denso Co Ltd On-vehicle controller

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS554703A (en) * 1978-06-21 1980-01-14 Toshiba Corp Main memory control system
JPS59148954A (en) * 1983-02-14 1984-08-25 Fujitsu Ltd Patrolling system of control storage
JPS603732A (en) * 1983-06-21 1985-01-10 Honda Motor Co Ltd Detection for abnormality of input and output device
JPS60114949A (en) * 1983-11-28 1985-06-21 Toshiba Corp Storage device
JPS61166654A (en) * 1985-01-19 1986-07-28 Panafacom Ltd Memory patrol diagnosis system
JPS61234401A (en) * 1985-04-11 1986-10-18 Nippon Denso Co Ltd On-vehicle controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8849504B2 (en) 2006-02-03 2014-09-30 Denso Corporation Electronic control apparatus for vehicles

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