APEX CAM as Cache for External CAM

In designs that use larger, discrete content-addressable memory (CAM) devices, you can use embedded CAM as a cache block for an external CAM device to store more frequently requested data. External CAM devices have longer access times compared to the embedded CAM in APEX devices. This white paper describes how embedded CAM can be used with external CAM and a cache megafunction to decrease access time and perform faster searches.

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