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

ID 683872
Date 12/15/2021
Public

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2.2.1.1. FHT-PMA-to-400G-Hard-IP-Fracture Mapping

Figure 11. FHT-PMA-to-400G-Hard-IP-Fracture Mapping

To read the previous figure and understand the PMA-to-fracture mapping options:

  1. Select the fracture type and index you want.
  2. Select the column for the number of PMAs you need.

The figure shows which PMAs are available to be mapped to the fracture and index you selected (and shows which PMAs are unavailable). For example:

  • You want st_x8_0 , and you need four PMAs. According to the figure, FHT3, FHT2, FHT1, and FHT0 are available, so this is a possible mapping.
  • However, you wanted st_x8_1 , and you needed four PMAs, according to the figure, it is not a possible mapping because there is no set of four PMAs available for st_x8_1 .
Figure 12. Understanding FHT-PMA-to-400G-Hard-IP-Fracture Mapping

FHT-PMA-to-400G-Hard-IP-Fracture Mapping Examples

  • Example 1: If you need the st_x8_0 fracture with four PMAs, map it to FHT3, FHT2, FHT1, and FHT0.
  • Example 2: If you need the st_x8_1 fracture with two PMAs, map it to FHT1 and FHT0. You cannot use FHT3 and FHT2 with st_x8_1 .
  • Example 3: If you need the st_x4_2 fracture with one PMA, map it to FHT1. You cannot use FHT3, FHT2, or FHT0.
  • Example 4: If you need the st_x1_2 fracture with one PMA, map it to FHT1 or FHT2. You cannot use FHT3 or FHT0.

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