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AM4378: EtherCAT interface

Part Number: AM4378


Dear,

Could you please let me confirm following understandings?  My understandings are following, am I right?

My understandings:
MII interface should be used for EtherCAT Slave.  This is mandatory.
RMII interface is O.K. for both EtherCAT Master or EtherCAT Slave.

Currently I have been developing EtherCAT Master with AM437x.  In Bechoff document, there are description as following.  Therefore EtherCAT Slave should use MII, I think.
While EtherCAT Master uses "general" Ethernet.  Therefore both of MII or RMII are O.K for EtherCAT Master.

https://download.beckhoff.com/download/document/io/ethercat-development-products/an_phy_selection_guidev2.3.pdf

Best regards,
Gou