1.3.2.3 64b66b Receiver

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The receiver takes 32-bits or 64-bits of data from the PMA's CDR on each clock beat into the gearbox. The gearbox frames the data into 66-bit symbols by searching for valid values on the sync header bits as per IEEE 802.3 Clause 49.

Figure 1-17. 64b66b Receive Sequence For 32-Bit Interface

Figure 1-18. 64b66b Receive Sequence For 64-Bit Interface

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