25G Ethernet Intel® Stratix® 10 FPGA IP User Guide

ID 683154
Date 9/15/2021
Document Table of Contents

4.1.2. 25 GbE TX PCS

The soft TX PCS implements MII encoding and scrambling. The 66-bit output stream is input to the hard PCS and PMA block.
Figure 15. High Level Block Diagram of the TX PCS with Optional RS-FEC

The Hard PCS and PMA blocks are configured in 66:64 bit basic generic 10G PCS mode whose status can be read through Control and Status registers. These blocks use FIFOs in elastic-buffer mode. The PMA operates at 25.78125 Gbps.

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