STM32F4 PA7 used by Ethernet and MEMS? Solution PTP?

[YRink]

Hello,

I have following ​Problem. Iam try to get Data from the MEMS and send it via Ethernet to another Controller. My issue is, that the Pin PA7 is used for the SPI Mosi and the Carrier Sense Data Valid by the Ethernet (RMII).

Now iam trying to receive Data without the PIN PA7 (Carrier Sense Data Valid). How I Can get my Data without using this Pin? Is PTP a possible solution for this? 

[waclawek.jan]

No, for RMII you must use PA7.

Connect your MEMS to other pin/SPI port.

JW

[YRink]

So, I can not get work Ethernet without using Pin PA7. Also not when iam using the PTP synchro or the MII? The MEMS is on the Board and only connected to the Pins PA5, PA6 and PA7. Apparently I have to do some work in the HW.