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MAX32 and PHY question

26 Jan 2012

mhanuel

Venezuela

Does anybody know the reason that the MAX32 board is designed for use the RMII interface, as stated on the rf manual page 10 under the 10/100 Ethernet MAC section.

I was looking at the board pin out and it seems the MII interface pins are all available on headers, could be due to some electrical conflict cause by any signal of the MII interface be used somewhere else?

I will appreciate if someone could enlight me.

 

Thank you in advance,

 

 

 

 

Replies

mhanuel

Venezuela
15 weeks ago

I was thinking it have to do with the signal routing, since it's a high speed design, one of the important things to look is differential signal layout.

Do you think possible to design a Network Shield for the Max32 board using MII interface?. I confirm that all signals are available on the 0.1" connectors.

 

Thank you,

chipKIT Cha ...

United Kingdom
15 weeks ago

The design of the Network Shield was copied from the Digilent Cerebot 32MX7 board (now MX7cK). It was easier to start with a known working design, and the software development would be easier if the two boards used the same design.

There were basically two reasons for choosing RMII when it was designed using the 32MX7. One reason was that the RMII interface uses fewer pins, leaving more of the pins available for other uses, and the other was that the SMSC LAN8720 chip is RMII only.