EP21DNC20DNC19DNC18DNC17DNC16VCC15PB2(SCK/USCK/SCL/ADC1/T0/INT0/PCINT2)14DNC13PB1(MISO/DO/AIN1/OC0B/OC1A/PCINT1)12PB0(MOSI/DI/SDA/AIN0/OC0A/OC1A#/AREF/PCINT0)11DNC10DNC9GND8DNC7DNC6(PCINT4/XTAL2/CLKO/OC1B/ADC2)PB45DNC4DNC3(PCINT3/XTAL1/CLKI/OC1B#/ADC3)PB32(PCINT5/RESET#/ADC0/dW)PB51