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

ID 683872
Date 12/15/2021

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6.2.1. Setting General and Common Datapath Options

The following parameter values define an instance of F-Tile PMA/FEC Direct PHY Intel® FPGA IP with the following properties:

  • Two FGT PMA operating at duplex mode, NRZ modulation, 32-bit data width
  • Two PMA lanes with data rate at 25.78125Gbps (supports 51.5625Gbps link)
  • System PLL datapath clocking mode and the output frequency
Table 95.  General and Common Datapath Options
Parameter Parameter Value
PMA type FGT
Number of PMA lanes 2
FGT PMA configuration rules Basic
PMA modulation type NRZ
PMA width 32

This parameterization uses two FGT PMA lanes. There are two EMIB, connecting to two PMA lanes, to form two streams of PMA direct datapath. The following is the bonding configuration for this example:

  • PMA bonding is disabled because the PMA width is 32-bit.
  • System bonding is enabled so two PMA lanes bond to form the 51.625Gbps link.
Figure 95. General and Common Datapath Options

Figure 96 shows the assignment of the PMA physical lanes to FGT3_Quad3 and FGT2_Quad2 location. This physical location of the PMA lanes uses the resources highlighted in (light blue) in the diagram. These resources are:

  • PMA lanes placed in FGT3_Quad3 and FGT2_Quad3
  • Fracture st_x1_0 and st_x1_1
  • EMIB_23 and EMIB_22
Figure 96. 400G Hard IP Fracture Resources Used and Placed by the Design