2.2.1 Full-Duplex Mode

Tx and Rx Duplex support is the most common use of the transceiver and often referred to as full-duplex. It is defined as the mode where the Rx and Tx portions of the PMA share resources such as clocking and reset functions. Full duplex uses a common clock for both the Tx and Rx, that is, the base rates and PCS widths are the same. Both PMA_ARSTN and PCS_ARSTN resets both the Tx and Rx of the PMA and PCS, respectively.

Full-duplex configures the XCVR with common Tx and Rx data rates. Although, users can see independent control for data rate and PCS-Fabric widths, a Libero SoC DRC prevent users from selecting different rates/widths when TX and RX is in full-duplex mode. In full-duplex mode, the user must match the Rx and Tx requirements.