DRF0850 pintout and capability to communicate over ETHERNET with other microcontrollers via SPI

Hi all,

 

I have developed an arduino compatible shield with my own microcontroller, however, I would like to enable it with Ethernet, PoE and additional memory.

 

I was looking into the DRF0850 but I have some questions:

- I've seen that using PoE I can get up to 12V at the Vin pin, but do I get 3.3V at the 3.3V pin? Is it an output?- Can I directly communicate via SPI with the SD card and Ethernet using my own microcontroller?Do you have any schematics or design files for the shield? 

Thanks a lot!