H-Tile Hard IP Ethernet Intel® FPGA IP User Guide: Stratix® 10 Devices

ID 683430
Date 4/09/2024
Public

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4.4. Auto-Negotiation and Link Training

The H-Tile Hard IP for 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 H-Tile Hard IP for Ethernet IP core includes separate link training modules for each of the two or four Ethernet lanes, and a single auto-negotiation module. You specify the master lane for performing auto-negotiation in the parameter editor.

Note: The auto-negotiation and link training features are only available for MAC + PCS IP core variation.