PC14-OSCX_IN1PC15-OSCX_OUT2VDD/VDDA3VSS/VSSA4PF2-NRST5PA06PA17PA28PA39PA410PA511PA612PA713PB014PB115PA816PC617PA11 [PA9]18PA12 [PA10]19PA1320PA14-BOOT021PA1522PB323PB424PB525PB626PB727PB828