JPS5641598A - Malfunction detecting circuit - Google Patents

Malfunction detecting circuit

Info

Publication number
JPS5641598A
JPS5641598A JP11491279A JP11491279A JPS5641598A JP S5641598 A JPS5641598 A JP S5641598A JP 11491279 A JP11491279 A JP 11491279A JP 11491279 A JP11491279 A JP 11491279A JP S5641598 A JPS5641598 A JP S5641598A
Authority
JP
Japan
Prior art keywords
address
memory
access
shows
output
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
JP11491279A
Other languages
Japanese (ja)
Inventor
Hideo Kaneko
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11491279A priority Critical patent/JPS5641598A/en
Publication of JPS5641598A publication Critical patent/JPS5641598A/en
Pending legal-status Critical Current

Links

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE: To secure the normalcy of a memory unit by detecting an address error in access to the memory.
CONSTITUTION: When entry address 11 of scratch pad memory 1 assigns (n) and access to address (n) of memory 1 is attained, scratch pad address memory 2 generates output 12 that shows (n). When address 11 assings (n), access to address 0, for example, due to a fault of the driving circuit results in that output 12 shows 0. Comparator 3, comparing address 11 to output 12, generates a signal that shows the normality when the both agree or the abnormality when not.
COPYRIGHT: (C)1981,JPO&Japio
JP11491279A 1979-09-07 1979-09-07 Malfunction detecting circuit Pending JPS5641598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11491279A JPS5641598A (en) 1979-09-07 1979-09-07 Malfunction detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11491279A JPS5641598A (en) 1979-09-07 1979-09-07 Malfunction detecting circuit

Publications (1)

Publication Number Publication Date
JPS5641598A true JPS5641598A (en) 1981-04-18

Family

ID=14649732

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11491279A Pending JPS5641598A (en) 1979-09-07 1979-09-07 Malfunction detecting circuit

Country Status (1)

Country Link
JP (1) JPS5641598A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61163450A (en) * 1985-01-16 1986-07-24 Nec Corp System for detecting malfunction of storage device
JPH04137051A (en) * 1990-09-28 1992-05-12 Yamatake Honeywell Co Ltd Communication system consisting of data memory device and data reader/writer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61163450A (en) * 1985-01-16 1986-07-24 Nec Corp System for detecting malfunction of storage device
JPH04137051A (en) * 1990-09-28 1992-05-12 Yamatake Honeywell Co Ltd Communication system consisting of data memory device and data reader/writer

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