PB1 (T1)41PB2 (INT2AIN0)42PB4 (SS#)44PB5 (MOSI)1PB6 (MISO)2PB7 (SCK)3RESET#4PD0 (RXD)9PD2 (INT0)11PD4 (OC1B)13XTAL27XTAL18PD1 (TXD)10PD3 (INT1)12PD5 (OC1A)14PD6 (ICP1)15PD7 (OC2)16PC0 (SCL)19PC1 (SDA)20PC2 (TCK)21PC3 (TMS)22PC4 (TDO)23PC5 (TDI)24PC6 (TOSC1)25PC7 (TOSC2)26PA7 (ADC7)30PA6 (ADC6)31PA5 (ADC5)32PA4 (ADC4)33PA3 (ADC3)34PA2 (ADC2)35PA1 (ADC1)36PB0 (XCKT0)40PA0 (ADC0)37PB3 (OC0AIN1)43VCC38GND39VCC5VCC17GND18AVCC27AREF29GND28GND6