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AR# 63031

AXI Ethernet - Why does the AXI Ethernet core not support Half Duplex?

Description

The LogiCORE IP AXI Ethernet v3.01a core does not support Half duplex.

Why does the core not support half duplex operation even though the inside MAC core is able to support this operation?

If parallel interface is selected for the Physical Interface Type, as in MII/GMII/RGMII, does it then support Half-Duplex?

Solution

No, even if parallel interface is used, the AXI Ethernet core does not support half duplex operation.

The core includes the PCS/PMA core which does not support half-duplex.

As a result, the AXI Ethernet core has not been designed for half-duplex operation and requires changes with respect to aborting current packet transfer on receiving collision from TEMAC, discarding a residual frame, supporting re-transmission of a frame etc.
AR# 63031
Date Created 12/04/2014
Last Updated 03/16/2015
Status Active
Type General Article
IP
  • AXI Ethernet