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JPS5744296A - Storage device - Google Patents

Storage device

Info

Publication number
JPS5744296A
JPS5744296A JP55119331A JP11933180A JPS5744296A JP S5744296 A JPS5744296 A JP S5744296A JP 55119331 A JP55119331 A JP 55119331A JP 11933180 A JP11933180 A JP 11933180A JP S5744296 A JPS5744296 A JP S5744296A
Authority
JP
Japan
Prior art keywords
ram5
address
computer
storage device
bits
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
JP55119331A
Other languages
Japanese (ja)
Inventor
Shigenobu Taira
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Ltd filed Critical Fujitsu Ltd
Priority to JP55119331A priority Critical patent/JPS5744296A/en
Publication of JPS5744296A publication Critical patent/JPS5744296A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
    • G11C29/70—Masking faults in memories by using spares or by reconfiguring
    • G11C29/78—Masking faults in memories by using spares or by reconfiguring using programmable devices
    • G11C29/781—Masking faults in memories by using spares or by reconfiguring using programmable devices combined in a redundant decoder

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To avoid the defective bits that are caused after packaging a computer, by storing the changover information of the redundant bit into a static RAM. CONSTITUTION:The write/read signal is applied to an input terminal T of a static RAM5 comprising FFs in accordance with the address of a defective cell that is selected by a memory tester, etc. Thus the address of the redundant bit is stored in the RAM5. As a result, the redundunt bits can be switched in an easy and assured way at any moment after the test process, the shipmemt process, the incorporating of computer, etc. to obtain a storage device having high reliability.
JP55119331A 1980-08-29 1980-08-29 Storage device Pending JPS5744296A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55119331A JPS5744296A (en) 1980-08-29 1980-08-29 Storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55119331A JPS5744296A (en) 1980-08-29 1980-08-29 Storage device

Publications (1)

Publication Number Publication Date
JPS5744296A true JPS5744296A (en) 1982-03-12

Family

ID=14758826

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55119331A Pending JPS5744296A (en) 1980-08-29 1980-08-29 Storage device

Country Status (1)

Country Link
JP (1) JPS5744296A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080200A (en) * 1983-10-07 1985-05-08 Fujitsu Ltd Semiconductor memory device
JPS63205899A (en) * 1987-02-20 1988-08-25 Rohm Co Ltd Semiconductor memory driving device
WO1998021639A1 (en) * 1996-11-09 1998-05-22 Reinhold Wein Interchangeable transportable data carrier unit for computers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080200A (en) * 1983-10-07 1985-05-08 Fujitsu Ltd Semiconductor memory device
JPH0326479B2 (en) * 1983-10-07 1991-04-10 Fujitsu Ltd
JPS63205899A (en) * 1987-02-20 1988-08-25 Rohm Co Ltd Semiconductor memory driving device
WO1998021639A1 (en) * 1996-11-09 1998-05-22 Reinhold Wein Interchangeable transportable data carrier unit for computers

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