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Ethernet MAC TO MAC Interface Schematic Review

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newbie_hs

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I have an ethernet MAC TO MAC connection between SAMA5D27 and S32K148.

Schematic is attached here.

May I know your comments.
 

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  • RMII_MAC TO MAC Review.pdf
    946 KB · Views: 129

Hi,

Please ask a clear and focussed question.

My comment: I see a PDF containing two pages of schematic with lots of lines and text. ;-)

Klaus
 

In the schematic you can see that two application processors are communicating via ethernet interface.
They are using MAC TO MAC communication.
Here RMII is used . One processor is SAMA5D27 from Microchip and the other is from NXP(S32K148.).

Ref designator of ethernet section of SAMA527 is U59D and this processor is working in 3.3V domain
and the reference designator of other processor is U19C and U19D.

Since they are working in different voltage levels there is a level translator used in between them(U16 and U15).

May I know my signal flow is proper between two processors and also the selection of direction of level shifters.

@ Klaust,Hope this is fine
 

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