JPS5698797A - Memory device - Google Patents

Memory device

Info

Publication number
JPS5698797A
JPS5698797A JP17231479A JP17231479A JPS5698797A JP S5698797 A JPS5698797 A JP S5698797A JP 17231479 A JP17231479 A JP 17231479A JP 17231479 A JP17231479 A JP 17231479A JP S5698797 A JPS5698797 A JP S5698797A
Authority
JP
Japan
Prior art keywords
memory
stand
memory element
normal
memory elements
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
JP17231479A
Other languages
Japanese (ja)
Inventor
Moriyuki Takamura
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 JP17231479A priority Critical patent/JPS5698797A/en
Publication of JPS5698797A publication Critical patent/JPS5698797A/en
Pending legal-status Critical Current

Links

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To decrease the number of stand-by memories, by substituting a normal memory, having memory elements arranged in an m-by-n matrix, by one stand-by memory element.
CONSTITUTION: The normal memory consists of memory elements M11WMnm arrayed in an m-by-n matrix and is provided one stand-by memory element Ma, which can substitute for any of memory elements M11WMnm of the siad normal memory. If memory element M13 gets out of order, change-over control signal B3 among change-over control signals B1WBm is activated and corresponding write data DI3 is selected and inputted to stand-by memory element Ma; and then chip selection signal CS1 is supplied to control circuit 4, from which signal CSa is outputted and applied to stand-by memory element Ma. As a result, stand-by memory element Ma operates simultaneously with memory elements M11WM1m.
COPYRIGHT: (C)1981,JPO&Japio
JP17231479A 1979-12-29 1979-12-29 Memory device Pending JPS5698797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17231479A JPS5698797A (en) 1979-12-29 1979-12-29 Memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17231479A JPS5698797A (en) 1979-12-29 1979-12-29 Memory device

Publications (1)

Publication Number Publication Date
JPS5698797A true JPS5698797A (en) 1981-08-08

Family

ID=15939611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17231479A Pending JPS5698797A (en) 1979-12-29 1979-12-29 Memory device

Country Status (1)

Country Link
JP (1) JPS5698797A (en)

Similar Documents

Publication Publication Date Title
JPS5580164A (en) Main memory constitution control system
JPS57198592A (en) Semiconductor memory device
JPS5345120A (en) Video special effect device
EP0270028A3 (en) Dual port memory device with improved serial access scheme
JPS54139343A (en) Clock-system memory
JPS5321542A (en) Error data memory circuit
EP0093954A3 (en) Image display memory unit
JPS55105760A (en) Memory control unit
CA2024433A1 (en) Main memory control system
JPS5698797A (en) Memory device
JPS57117198A (en) Memory system with parity
EP0136819A3 (en) Semiconductor memory
JPS55103636A (en) Display unit
CA2067458A1 (en) Method and apparatus for accessing non-volatile memory
JPS57127997A (en) Semiconductor integrated storage device
JPS5552600A (en) Main memory unit
JPS5720979A (en) Memory control system
JPS6423488A (en) Memory
JPS5393735A (en) Memory control system
JPS54136229A (en) Keyboard
JPS5622292A (en) Memory element
JPS5458316A (en) Control memory unit
JPS57205897A (en) Memory access controller
JPS6423500A (en) Read-only semiconductor memory
JPS5525109A (en) Logic circuit