GB2010546A - Word-Organized, Content- Addressable Memory - Google Patents

Word-Organized, Content- Addressable Memory

Info

Publication number
GB2010546A
GB2010546A GB7848656A GB7848656A GB2010546A GB 2010546 A GB2010546 A GB 2010546A GB 7848656 A GB7848656 A GB 7848656A GB 7848656 A GB7848656 A GB 7848656A GB 2010546 A GB2010546 A GB 2010546A
Authority
GB
United Kingdom
Prior art keywords
word
location
signal
content
addressable memory
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
GB7848656A
Other versions
GB2010546B (en
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB2010546A publication Critical patent/GB2010546A/en
Application granted granted Critical
Publication of GB2010546B publication Critical patent/GB2010546B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C15/00—Digital stores in which information comprising one or more characteristic parts is written into the store and in which information is read-out by searching for one or more of these characteristic parts, i.e. associative or content-addressed stores
    • G11C15/04—Digital stores in which information comprising one or more characteristic parts is written into the store and in which information is read-out by searching for one or more of these characteristic parts, i.e. associative or content-addressed stores using semiconductor elements

Abstract

In order to reduce the number of pins required on its encapsulation(s) when a word-organised, content- addressable memory is constructed in integrated circuit form the "correspondence" signal output (M1) of each word location (36) is coupled to an "information-transfer-enable" signal input thereof via a signal path which can be blocked if a bistable validity indicator (39) is in its reset state. If this is so and a "write in a free word position" signal (WFP) is applied to the arrangement after flip-flop 42 has been set the corresponding word location will be activated provided that a multiple match resolver or sequence generator (42, 46, 48, 49, 80, 81, 140) gives that location priority. If the validity indicator is in its set state application of a masked keyword (37) will cause the corresponding word location to be activated if correspondence occurs provided the sequence generator gives the location priority. Selected validity indicators can be reset by applying a keyword and a "clear part of memory" signal (CPM) to the arrangement. Output 140 is connected to the input 81 for the following word location (36). <IMAGE>
GB7848656A 1977-12-16 1978-12-15 Word-organized content-addressable memory Expired GB2010546B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7713949A NL7713949A (en) 1977-12-16 1977-12-16 WORD ORGANIZED BY CONTENT ADDRESSABLE MEMORY.

Publications (2)

Publication Number Publication Date
GB2010546A true GB2010546A (en) 1979-06-27
GB2010546B GB2010546B (en) 1982-04-07

Family

ID=19829773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7848656A Expired GB2010546B (en) 1977-12-16 1978-12-15 Word-organized content-addressable memory

Country Status (7)

Country Link
JP (1) JPS5851357B2 (en)
CA (1) CA1118906A (en)
DE (1) DE2853926A1 (en)
FR (1) FR2412140A1 (en)
GB (1) GB2010546B (en)
IT (1) IT1101571B (en)
NL (1) NL7713949A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5774889A (en) * 1980-10-28 1982-05-11 Nippon Telegr & Teleph Corp <Ntt> Associative memory device
JPS58128097A (en) * 1981-12-29 1983-07-30 Fujitsu Ltd Semiconductor storage device
GB2127998B (en) 1982-09-27 1986-06-18 Data General Corp Encachement apparatus
JPH01223697A (en) * 1988-03-01 1989-09-06 Mitsubishi Electric Corp Contents addressing storage device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL250650A (en) * 1959-04-30
US3609702A (en) * 1967-10-05 1971-09-28 Ibm Associative memory
US3611315A (en) * 1968-10-09 1971-10-05 Hitachi Ltd Memory control system for controlling a buffer memory
US3806889A (en) * 1972-12-19 1974-04-23 Bell Telephone Labor Inc Associative memory including a resolver

Also Published As

Publication number Publication date
JPS5489535A (en) 1979-07-16
FR2412140A1 (en) 1979-07-13
NL7713949A (en) 1979-06-19
GB2010546B (en) 1982-04-07
IT1101571B (en) 1985-10-07
DE2853926A1 (en) 1979-06-21
FR2412140B1 (en) 1984-12-28
IT7830801A0 (en) 1978-12-13
JPS5851357B2 (en) 1983-11-16
CA1118906A (en) 1982-02-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee