User`s guide

Port Pin Orangutan Function Notes/Alternate Functions

PA0 analog input and digital I/O ADC input channel 0 (ADC0)

PA1 analog input and digital I/O ADC input channel 1 (ADC1)

PA2 analog input and digital I/O ADC input channel 2 (ADC2)

PA3 analog input and digital I/O ADC input channel 3 (ADC3)

PA4 analog input and digital I/O ADC input channel 4 (ADC4)

PA5 analog input and digital I/O ADC input channel 5 (ADC5)

PA6 analog input and digital I/O ADC input channel 6 (ADC6)

PA7 analog input and digital I/O ADC input channel 7 (ADC7)

PB0 LCD control line RS Timer/Counter 0 External Counter Input (T0)

PB1 LCD control line R/W

Divided system clock output (CLKO)

Timer/Counter 1 External Counter Input (T1)

PB2 LCD control line E

External interrupt 2 (INT2)

Analog Comparator Positive Input (AIN0)

PB3 digital I/O

Timer0 PWM output A (OC0A)

Analog Comparator Negative Input (AIN1)

PB4 digital output*

Timer0 PWM output B (OC0B)

SPI Slave Select Input (SS)

PB5 auxiliary processor control line

SPI Master Output/Slave Input (MOSI)

ISP programming line

PB6 auxiliary processor control line

SPI Master Input/Slave Output (MISO)

ISP programming line

PB7 auxiliary processor control line

SPI Clock (SCK)

ISP programming line

PC0 digital I/O I2C/TWI clock line (SCL)

PC1 digital I/O I2C/TWI input/output data line (SDA)

PC2 LCD data line DB4 user pushbutton (pressing pulls low)

PC3 LCD data line DB5 user pushbutton (pressing pulls low)

PC4 LCD data line DB6 green user LED (high turns LED on)

PC5 LCD data line DB7 user pushbutton (pressing pulls low)

PC6 M2 direction control line

PC7 M1 direction control line

7. AVR Pin Assignment Table Sorted by Pin Page 29 of 41