| 摘要 |
A content addressable memory (CAM) ( 200 ) is disclosed that includes a value match mode, where a comparand value can be compared to a masked data value, and a range match mode where a comparand value can be compared to an upper range limit UR and a lower range limit LR. The CAM ( 200 ) may include a number of CAM cells ( 204 -n to 204 - 0 ) that may each be connected to a compare section ( 109 ). A compare section ( 109 ) can include a first compare circuit ( 210 ) that may generate a match indication on a match line ( 212 ) and a second compare circuits ( 214 -n to 214 - 0 ). A more significant second compare circuits ( 214 -n) may provide upper and lower limit match results (UMn, LMn) to a less significant first compare circuit ( 210 ).
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