Functional Description
Microsemi Proprietary and Confidential UG0677 User Guide Revision 9.0 33
3.3.2.3 64b66b Receiver
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 18 • 64b66b Receive Sequence For 32-Bit Interface
Figure 19 • 64b66b Receive Sequence For 64-Bit Interface