There are a few pins that appear to be duplicated on the pin layout. (http://new-docs.ghielectronics.com/hardware/sitcore/pdfs/scm20260d.pdf)
Can you clarify the difference:
PIN:36, PA0 C -> PIN:97, PA0
PIN:38, PC2 C -> PIN:157, PC2
PIN:39, PC3 C -> PIN:158, PC3
There are about 12 pins that are assigned to processor pins but have not function defined, for example pin 82, PG6. Are these available for GPIO?