PD31PD42NC3VCC4GND5NC6XTAL17XTAL28PD59PD610PD711(AIN0)PB012(AIN1)PB113(T0)PB214(INT0)PB315(INT1)PB416PB517VCC18NC19NC20GND21NC22PB623PB724PA2(IR)25PA326PA127PA028RESET#29PD030PD131PD232EP33