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Connection of Ethernet PHY and i.MX6

Question asked by ko-hey on Jun 24, 2015
Latest reply on Jun 26, 2015 by gusarambula

Hi all



Let me confirm about i.MX6 and Ethernet PHY.

Can i.MX6 connect directly to Ethernet PHY ?



I will plan to use a AR8031 in my board because SABRE board is used it.

To use as reference, I have checked two schematics of MCIMX6SX-SDB and SABRE-AVB.


As a result, I found the connection between MCIMX6SX-SDB and SABRE-AVB is a different.

The difference is below:


・MCIMX6SX-SDB has direct connection.

・SABRE-AVB connects via NC7WV16.



Why the SABRE-AVB connects via buffer(NC7WV16) ?


I guess the board needs buffer because it is daughter board type.

Is it correct ?

If not, please tell me the reason.



Furthermore, if you have information, please share me about a distance which is required buffer.