PA628PA527PA426PA325PA224PA123PA0(EXTCLK)22GND21VDD20UPDI19PF6(RESET#)18PF1(XTAL32K2)17PF0(XTAL32K1)16GND15AVDD14PD713PD612PD511PD410PD39PD28PD17PD06PC35PC24PC13PC02PA71