F-Tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 11/04/2024
Public
Document Table of Contents

5.4. Instantiating the F-Tile Reference and System PLL Clocks Intel® FPGA IP

The F-Tile Refeece ad System PLL Clocks Itel® FPGA IP is equied fo F-tile PMA/FEC Diect PHY desigs. You must istatiate ad coect this IP fo simulatio ad compilatio.

This desig equies the followig fo the F-Tile Refeece ad System PLL Clocks Itel® FPGA IP:

  • System PLL mode ad efeece clock souce fo oe system PLL that clocks the datapath.
  • Refeece clock souce fo FGT PMA. Shae o sepaate the efeece clock souce fo system PLL ad FGT PMA. This example shaes the efeece clock.

To specify the system PLL mode ad efeece clock souce fo oe system PLL:

  1. I the IP Catalog seach field, type f-tile Refeece, ad double-click the F-Tile Refeece ad System PLL Clocks Itel® FPGA IP ude Tasceive PHY.
  2. O the System PLL #0 tab, specify the followig:
    Table 113.  System PLL #0 Optios
    Paamete Paamete Value
    Mode of system PLL Select ETHERNET_FREQ_830_156. This cofigues the system PLL iput fequecy to 156.25 MHz ad output fequecy to 830.078125 MHz (must match system PLL fequecy i F-Tile PMA/FEC Diect PHY Itel® FPGA IP).
    Refclk souce RefClk #0. Selects the efeece clock souce fo system PLL.
    RefClk #0 fo FGT PMA O
  3. Ude RefClk, specify the followig optios:
    Table 114.  RefClk Optios
    Paamete Paamete Value
    Eable RefClk #0 fo FGT PMA O. This efeece clock is shaed betwee system PLL #0 ad FGT PMA
    RefClk souce RefClk #0. 156.25 MHz (same as efeece clock fequecy fo F-Tile PMA/FEC Diect PHY Itel® FPGA IP).
Figue 108. System PLL ad RefClk Optios

The followig figues shows the block symbol ad available pots fo F-Tile Refeece ad System PLL Clocks Itel® FPGA IP i this example

Figue 109. Example F-Tile Refeece ad System PLL Clocks Itel® FPGA IP Pots