Triple-Speed Ethernet IP User Guide: Agilex™ 3 and Agilex™ 5 FPGAs and SoCs

ID 813669
Date 8/04/2025
Public
Document Table of Contents

3.7. LVDS Pin Settings

Each byte and pin pair combination must be unique in the LVDS SERDES interface across receivers and transmitters. The combination of the channel byte and pins, and which I/O lane you place the channel byte determines the pin locations within the I/O bank.

To customize the pin selections, you must first plan your LVDS SERDES interface channels placement before configuring the LVDS Pin Settings tab.

Table 17.  LVDS Pin Settings Parameter
Parameter Value Description
Customize Pin Selection
Customize Pin Selections
  • On
  • Off

Turn on to manually select each byte and pin pair reference for the RX and TX channels.

Turn off to automatically specify all byte and pin pair references.
  • Use the Interface Planner tool to place each byte in an I/O lane.
  • Refer to the related information section for the details on:
    • The equivalent pin index numbers based on which I/O lane you place each channel.
    • The differential pin placement restrictions.
The default value is Off.
RX Pin Settings
RX channel n byte 00 to 07

Select the byte reference to use for the RX channel.

Use the Interface Planner tool to place the byte in an I/O lane. Refer to the related information for the differential pin placement restrictions.

RX channel n pin
  • 0001
  • 0203
  • 0405
  • 0607
  • 0809
  • 1011
Select the pin pair reference within the byte.

Refer to the related information for which pin pair to select based on which pin index numbers and I/O lane you want to place the channel.

TX Pin Settings

TX channel n byte

00 to 07

Select the byte reference to use for the TX channel.

Use the Interface Planner tool to place the byte in an I/O lane. Refer to the related information for the differential pin placement restrictions.

TX channel n pin

  • 0001
  • 0203
  • 0405
  • 0607
  • 0809
  • 1011
Select the TX out clock pin pair reference within the byte.

Refer to the related information for which pin pair to select based on which pin index numbers and I/O lane you want to place the TX outclock.