Low Latency 40G for ASIC Proto Ethernet Intel® FPGA IP User Guide

ID 683221
Date 11/10/2022
Public
Document Table of Contents

4.1.2. Low Latency 40G for ASIC Proto Ethernet Core RX MAC Datapath

The RX MAC receives Ethernet frames and forwards the payload with relevant header bytes to the client after performing some MAC functions on header bytes. The RX MAC processes all incoming valid frames.

Figure 8. Flow of Client Frame With Preamble Pass-Through Turned On This figure uses the following notational conventions:
  • <p> = payload size, which is arbitrarily large.
  • <s> = number of padding bytes (0–46).
Figure 9. Flow of Client Frame With Preamble Pass-Through Turned Off This figure uses the following notational conventions:
  • <p> = payload size, which is arbitrarily large.
  • <s> = number of padding bytes (0–46).