I would like to use the most pins possible on my Due. I have read in a few places that some pins are duplicates?
I cannot read a pin schematic and make heads or tales of it. It says that D10 = D77 and D4 = D87... are those duplicates in the CODE, or on the physical board?
anyway, I'm using Serial over USB.
My question in the most clear way I can put it: Looking at the board, which physical pins can I use as Digital IO and which ones are duplicates or unavailable because of Serial. I think 0 and 1 are used for serial?
Followup: What about if I (additionally) use the dedicated SPI pins in the middle (for SPI)? What pins are those duplicates of?
Thanks and sorry if this is obvious to some of you. I honestly can't read that schematic and I've been looking at it since November, way before I got the Due.