Arduino for STM32

They are not only for USB. But you cannot connect board with USB data cable (only power, no data wires) or connect it to power source that does not have data wires connected. And do not enable USB in board settings. but even when I disconnect the USB from computer and connect external 5v power to t...

My first venture with F411 board
Amazed to find that PA11 and PA12 are unusable as digital inputs and outputs and are only for USB.
Is this so always?
is it possible to use them as either input or output under any conditions?