PB5(MOSI)1PB6(MISO)2PB7(SCK)3RESET#4VCC5GND6XTAL27XTAL18PD0(RXD)9PD1(TXD)10PD2(INT0)11PD3(INT1)12PD4(OC1B)13PD5(OC1A)14PD6(ICP1)15PD7(OC2)16VCC17GND18PC0(SCL)19PC1(SDA)20PC2(TCK)21PC3(TMS)22PC4(TDO)23PC5(TDI)24PC6(TOSC1)25PC7(TOSC2)26AVCC27GND28AREF29PA7(ADC7)30PA6(ADC6)31PA5(ADC5)32PA4(ADC4)33PA3(ADC3)34PA2(ADC2)35PA1(ADC1)36PA0(ADC0)37VCC38GND39PB0(XCK/T0)40PB1(T1)41PB2(AIN0/INT2)42PB3(AIN1/OC0)43PB4(SS#)44GND45