Low Latency 50G Ethernet Intel® FPGA IP User Guide: Stratix® 10 Devices

ID 683675
Date 4/09/2024
Public
Document Table of Contents

4.7. Auto Negotiation and Link Training

The Low Latency 50G Ethernet IP core variations with auto negotiation and link training implement the IEEE Backplane Ethernet Standard 802.3-2012.

The IP core includes the option to implement the following features:

  • Auto negotiation provides a process to explore coordination with a link partner on a variety of different common features. Turn on the Enable AN/LT and Enable Auto Negotiation parameters to configure support for auto negotiation.
  • Link training provides a process for the IP core to train the link to the data frequency of incoming data, while compensating for variations in process, voltage, and temperature. Turn on the Enable AN/LT and Enable Link Training parameters to configure support for link training.

The Low Latency 50G Ethernet IP core includes separate link training and FEC modules for each of the four Ethernet lanes, and a single auto negotiation module. You specify the master lane for performing auto negotiation in the parameter editor.