| 摘要 |
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.
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