JPS5376637A - Diagnostic system of memory device only for reading - Google Patents

Diagnostic system of memory device only for reading

Info

Publication number
JPS5376637A
JPS5376637A JP15242076A JP15242076A JPS5376637A JP S5376637 A JPS5376637 A JP S5376637A JP 15242076 A JP15242076 A JP 15242076A JP 15242076 A JP15242076 A JP 15242076A JP S5376637 A JPS5376637 A JP S5376637A
Authority
JP
Japan
Prior art keywords
reading
memory device
diagnostic system
region
error detection
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
JP15242076A
Other languages
Japanese (ja)
Inventor
Fumio Matsumura
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 JP15242076A priority Critical patent/JPS5376637A/en
Publication of JPS5376637A publication Critical patent/JPS5376637A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards

Landscapes

  • Test And Diagnosis Of Digital Computers (AREA)
  • Read Only Memory (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To make the hardware for inspection small by adding a redundant bit only to some region of a memory unit and by performing the error detection or error detection and correction only when this region is read out.
JP15242076A 1976-12-17 1976-12-17 Diagnostic system of memory device only for reading Pending JPS5376637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15242076A JPS5376637A (en) 1976-12-17 1976-12-17 Diagnostic system of memory device only for reading

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15242076A JPS5376637A (en) 1976-12-17 1976-12-17 Diagnostic system of memory device only for reading

Publications (1)

Publication Number Publication Date
JPS5376637A true JPS5376637A (en) 1978-07-07

Family

ID=15540114

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15242076A Pending JPS5376637A (en) 1976-12-17 1976-12-17 Diagnostic system of memory device only for reading

Country Status (1)

Country Link
JP (1) JPS5376637A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525868A (en) * 1978-08-14 1980-02-23 Nec Corp Diagnostic system for control memory
JPS57127997A (en) * 1981-01-30 1982-08-09 Nec Corp Semiconductor integrated storage device
JPH0683716A (en) * 1992-09-01 1994-03-25 Rohm Co Ltd Electrically rewritable non-volatile memory
JP2011515784A (en) * 2008-03-18 2011-05-19 サムスン エレクトロニクス カンパニー リミテッド Encoding and / or decoding memory device and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525868A (en) * 1978-08-14 1980-02-23 Nec Corp Diagnostic system for control memory
JPS5931800B2 (en) * 1978-08-14 1984-08-04 日本電気株式会社 Control memory diagnostic method
JPS57127997A (en) * 1981-01-30 1982-08-09 Nec Corp Semiconductor integrated storage device
JPH0683716A (en) * 1992-09-01 1994-03-25 Rohm Co Ltd Electrically rewritable non-volatile memory
JP2011515784A (en) * 2008-03-18 2011-05-19 サムスン エレクトロニクス カンパニー リミテッド Encoding and / or decoding memory device and method

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