<p></p>
<p>I am quiet sure this configures an an output pin (PA7) to an output pin "RMII RX Data Valid" of the Ethernet controller on the Nucleo-144 boards like F767ZI<br>
i am not sure if this is save in this case but i think there might be other dev boards that will not like PA6 to PA11 (or PA6 to PB3 in the avr-case (at frist glace it seems that there is a overflow)) to be configured as output.<br>
This should not be executed without having the Makefile checked for the specific Board (not automatic)</p>

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