发明名称 |
Content addressable memory (CAM) devices having dedicated mask cell sub-arrays therein and methods of operating same |
摘要 |
Content addressable memory (CAM) devices achieve high integration by utilizing one or more CAM arrays that are each partitioned by rows into a CAM cell sub-array and a dedicated mask cell sub-array. Each row of mask cells within the mask cell sub-array can be selectively read during one search operation and then used to globally mask one or more columns of the CAM cell sub-array during a following search operation. Mask assertion circuitry is provided to couple a respective mask cell sub-array to a bit/data line control circuit that drives bit and/or data lines to the CAM cell sub-array during read, write and search operations. The mask cell sub-array and CAM cell sub-array may be segmented arrays that support pipelined search, write and read mask operations.
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申请公布号 |
US6839256(B1) |
申请公布日期 |
2005.01.04 |
申请号 |
US20030386400 |
申请日期 |
2003.03.11 |
申请人 |
INTEGRATED DEVICE TECHNOLOGY, INC. |
发明人 |
PROEBSTING ROBERT J.;PARK KEE;CHU SCOTT YU-FAN |
分类号 |
G11C15/00;(IPC1-7):G11C15/00;G06F12/00 |
主分类号 |
G11C15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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