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DP83822I: RMII MAC interface configuration

Part Number: DP83822I

Hello,

I am using RMII interface and connected external 25MHz Crystal to PHY IC.

Can you please confirm below which MAC configuration needs to be set to enable required RMII interface 50MHz clock on "RX_D3" PHY pin?

 

"RMII, 25MHz Reference Clock" or "RMII, 50MHz Reference Clock" ?