E-tile Hard IP User Guide: E-Tile Hard IP for Ethernet and E-Tile CPRI PHY Intel® FPGA IPs

ID 683468
Date 12/13/2021
Public

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2.9.1.2. MAC RX Datapath

When the RX MAC in the channel is enable, it receives Ethernet frames from the PHY and forwards it to the client with framing information together with the results of header and error checking functions.

You can configure whether to include or remove the PAD bytes and FCS using the Bytes to remove from RX frames parameter.

Figure 15. Flow of Frame Through the MAC RX Without Preamble Pass-ThroughThe figure illustrates the typical flow of frame through the MAC RX when the preamble pass-through feature is turned off. In this figure, <p> is payload size, and <s> is the number of pad bytes (0–46 bytes).
Figure 16. Flow of Frame Through the MAC RX With Preamble Pass-ThroughThe figure illustrates the typical flow of frame through the MAC RX when the preamble pass-through feature is turned on. In this figure, <p> is payload size, and <s> is the number of pad bytes (0–46 bytes)..

The following sections describe the functions performed by the RX MAC:

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