CA2403541A1 - Content-addressable memory device - Google Patents

Content-addressable memory device Download PDF

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Publication number
CA2403541A1
CA2403541A1 CA002403541A CA2403541A CA2403541A1 CA 2403541 A1 CA2403541 A1 CA 2403541A1 CA 002403541 A CA002403541 A CA 002403541A CA 2403541 A CA2403541 A CA 2403541A CA 2403541 A1 CA2403541 A1 CA 2403541A1
Authority
CA
Canada
Prior art keywords
content
memory device
addressable memory
word line
current time
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
CA002403541A
Other languages
French (fr)
Other versions
CA2403541C (en
Inventor
Teruo Kaganoi
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
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 filed Critical NEC Corp
Publication of CA2403541A1 publication Critical patent/CA2403541A1/en
Application granted granted Critical
Publication of CA2403541C publication Critical patent/CA2403541C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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

Abstract

A content-addressable memory device with multiple WORD lines has: a first memory block to store whether there is a hit during current time period; a second memory block to store whether there is a hit during a period preceding the current time period, the first and second memory blocks being provided for each WORD line;
and means of selecting a WORD line to determine a WORD line to be aged out according to values stored in the first and second memory blocks.
CA002403541A 2001-09-18 2002-09-17 Content-addressable memory device Expired - Fee Related CA2403541C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001282755A JP3702950B2 (en) 2001-09-18 2001-09-18 Associative memory device
JP2001-282755 2001-09-18

Publications (2)

Publication Number Publication Date
CA2403541A1 true CA2403541A1 (en) 2003-03-18
CA2403541C CA2403541C (en) 2005-11-08

Family

ID=19106362

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002403541A Expired - Fee Related CA2403541C (en) 2001-09-18 2002-09-17 Content-addressable memory device

Country Status (3)

Country Link
US (1) US6614676B2 (en)
JP (1) JP3702950B2 (en)
CA (1) CA2403541C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3808837B2 (en) 2003-03-11 2006-08-16 株式会社東芝 Cache memory system
US7082493B1 (en) 2003-10-31 2006-07-25 Integrated Device Technology, Inc. CAM-based search engines and packet coprocessors having results status signaling for completed contexts

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168541A (en) * 1978-09-25 1979-09-18 Sperry Rand Corporation Paired least recently used block replacement system
JP3140695B2 (en) * 1996-10-17 2001-03-05 川崎製鉄株式会社 Associative memory device
US6381673B1 (en) * 1998-07-06 2002-04-30 Netlogic Microsystems, Inc. Method and apparatus for performing a read next highest priority match instruction in a content addressable memory device
JP2002050184A (en) * 2000-08-01 2002-02-15 Kawasaki Microelectronics Kk Associative memory

Also Published As

Publication number Publication date
JP2003091454A (en) 2003-03-28
US6614676B2 (en) 2003-09-02
JP3702950B2 (en) 2005-10-05
US20030053325A1 (en) 2003-03-20
CA2403541C (en) 2005-11-08

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