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

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

5.2.2. Setting TX Datapath Options

Specify optios fo the followig o the F-Tile PMA/FEC Diect PHY Itel® FPGA IP paamete edito TX Datapath Optios tab:

  • TX FGT PMA
  • TX FGT PLL
  • TX datapath FIFO modes

The desig specifies the followig TX Datapath Optios:

Table 108.  TX FGT PLL Optios
Paamete Paamete Value
TX FGT PLL efeece clock fequecy Select 156.25MHz. The TX FGT PLL efeece clock fequecy must match the efeece clock fequecy that the F-Tile Refeece ad System PLL Clocks Itel® FPGA IP specifies, as TX FGT PLL Settigs shows. To coect the out_efclk_fgt_0 to this IP, efe to Coectig the F-Tile PMA/FEC Diect PHY Desig IP
Figue 103. TX FGT PLL Settigs
Table 109.  TX PMA Iteface Optios
Paamete Paamete Value
TX PMA iteface FIFO mode Elastic
Eable custom cadece geeatio pots ad logic

Geeates the tx_cadece pot that you ca use to asset ad de-asset the PMA data valid bit. This optio is eeded because the system PLL fequecy is geate tha the PMA clock fequecy i this desig. Refe to Custom Cadece Geeatio Pots ad Logic.

TX coe Iteface FIFO Mode Phase Compesatio
TX tile FIFO Iteface FIFO Mode Phase Compesatio
Eable TX double width tasfe O. Whe O, you must dive the tx_clkout souce with Sys PLL Clk Div2 souce istead of sys PLL clk souce. Divide the coe clockig fequecy by two to avoid exceedig the maximum EMIB to coe fequecy specificatio.
Figue 104. TX PMA Iteface Optios