发明名称 |
Improvements in or relating to computer memories |
摘要 |
A content addressable memory (CAM) (30) and a method of using it to sequentially match tags stored in the CAM to a target tag. The CAM (30) has a tag memory (20) comprised of tag cells (10, 10a) and also has a data cache. Each tag cell (10, 10a) is structured like a conventional RAM cell for storing a bit of data but also has a multiplexing switch (16) at its output. The multiplexing switch (16) applies a signal representing the tag cell's contents to a readline (15). A tag compare circuit (25) external to tag memory (20). On each readline, tag compare circuit (25) compares a bit from each cell (10, 10a) in a selected column to a bit of the target address. This cycle is repeated for all bits of the target address and successive columns of the tag memory unless terminated by a mismatch for all cells (10, 10a) in a column. The tag compare circuit (25) has logic circuitry that maintains a "hit" output signal. <IMAGE> |
申请公布号 |
EP0920030(A3) |
申请公布日期 |
1999.08.11 |
申请号 |
EP19980309665 |
申请日期 |
1998.11.25 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
FUNG, PAK KUEN;TRAN, HIEP VAN |
分类号 |
G06F12/08;G11C15/00;G11C15/04 |
主分类号 |
G06F12/08 |
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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