188.8.131.52.1. Transmitter Bit Reversal
This feature is parameter-based, and creates no additional ports. If there is more than one channel in the design, all channels have TX bit reversal. To enable TX bit reversal, select the Enable TX bit reversal option in the Native PHY IP core.
You can implement soft logic to perform bit reversal for the Enhanced PCS.
Refer to the 8B/10B Encoder Bit Reversal Feature section for more information.