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JPS57162159A - Storage element with clear function - Google Patents

Storage element with clear function

Info

Publication number
JPS57162159A
JPS57162159A JP56045838A JP4583881A JPS57162159A JP S57162159 A JPS57162159 A JP S57162159A JP 56045838 A JP56045838 A JP 56045838A JP 4583881 A JP4583881 A JP 4583881A JP S57162159 A JPS57162159 A JP S57162159A
Authority
JP
Japan
Prior art keywords
clear
counter
signal
written
memory cell
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.)
Granted
Application number
JP56045838A
Other languages
Japanese (ja)
Other versions
JPS6146914B2 (en
Inventor
Akihisa Makita
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 JP56045838A priority Critical patent/JPS57162159A/en
Publication of JPS57162159A publication Critical patent/JPS57162159A/en
Publication of JPS6146914B2 publication Critical patent/JPS6146914B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C7/00Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/20Memory cell initialisation circuits, e.g. when powering up or down, memory clear, latent image memory

Abstract

PURPOSE:To eliminate the need for the monitor of end of clear even at external side, by providing a means outputting a clear end signal externally and providing a clear function in a storage element. CONSTITUTION:When a clear indication signal 107 goes to ''1'', a flip-flop(F/F)12 storing the state of clear is set and a counter 11 is reset. When data ''0'' is written to an address 0 of a memory cell array 1 instructed by the counter 11 by means of an output signal 109, the Add 1 instruction is given to the counter 11 with an output signal 105 delayed at a delay circuit 14 and ''0'' is written in the memory cell array 1 until overflow takes place. When the counter 11 overflows, ''0'' is written in all the addresses of the memory cell array 1 (to be cleared). thus, a signal 103 goes to ''1'' and a clear end signal 122 is outputted externally.
JP56045838A 1981-03-27 1981-03-27 Storage element with clear function Granted JPS57162159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56045838A JPS57162159A (en) 1981-03-27 1981-03-27 Storage element with clear function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56045838A JPS57162159A (en) 1981-03-27 1981-03-27 Storage element with clear function

Publications (2)

Publication Number Publication Date
JPS57162159A true JPS57162159A (en) 1982-10-05
JPS6146914B2 JPS6146914B2 (en) 1986-10-16

Family

ID=12730358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56045838A Granted JPS57162159A (en) 1981-03-27 1981-03-27 Storage element with clear function

Country Status (1)

Country Link
JP (1) JPS57162159A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51102440A (en) * 1974-11-26 1976-09-09 Texas Instruments Inc DEJITARUDENSHIKEI SANKI
JPS52132747A (en) * 1976-04-30 1977-11-07 Fuji Electric Co Ltd Memory media initial clear control system
JPS5922266A (en) * 1982-07-28 1984-02-04 Nec Corp Driving means of magnetic head

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51102440A (en) * 1974-11-26 1976-09-09 Texas Instruments Inc DEJITARUDENSHIKEI SANKI
JPS52132747A (en) * 1976-04-30 1977-11-07 Fuji Electric Co Ltd Memory media initial clear control system
JPS5922266A (en) * 1982-07-28 1984-02-04 Nec Corp Driving means of magnetic head

Also Published As

Publication number Publication date
JPS6146914B2 (en) 1986-10-16

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