SS_0: EXT1 PIN15 (PA05) <> EXT2 PIN15 (PA17)
DO/DI: EXT1 PIN16 (PA06) <> EXT2 PIN17 (PA16)
DI/DO: EXT1 PIN17 (PA04) <> EXT2 PIN16 (PA18)
SCK: EXT1 PIN18 (PA07) <> EXT2 PIN18 (PA19)
SS_0: EXT1 PIN15 (PB03) <> EXT1 PIN10 (PA23)
DO/DI: EXT1 PIN16 (PB22) <> EXT1 PIN9 (PA22)
DI/DO: EXT1 PIN17 (PB02) <> EXT1 PIN7 (PA18)
SCK: EXT1 PIN18 (PB23) <> EXT1 PIN8 (PA19)
SS_0: EXT1 PIN15 (PA05) <> EXT1 PIN12 (PA09)
DO/DI: EXT1 PIN16 (PA06) <> EXT1 PIN11 (PA08)
DI/DO: EXT1 PIN17 (PA04) <> EXT2 PIN03 (PA10)
SCK: EXT1 PIN18 (PA07) <> EXT2 PIN04 (PA11)
SS_0: EXT1 PIN15 (PB21) <> EXT2 PIN15 (PA17)
DO/DI: EXT1 PIN16 (PB00) <> EXT2 PIN17 (PA16)
DI/DO: EXT1 PIN17 (PB02) <> EXT2 PIN16 (PA18)
SCK: EXT1 PIN18 (PB01) <> EXT2 PIN18 (PA19)
SS_0: EXT1 PIN15 (PA17) <> EXT2 PIN15 (PB03)
DO/DI: EXT1 PIN16 (PA18) <> EXT2 PIN17 (PB02)
DI/DO: EXT1 PIN17 (PA16) <> EXT2 PIN16 (PB00)
SCK: EXT1 PIN18 (PA19) <> EXT2 PIN18 (PB01)