Port C Pins
Orangutan Function
Notes/Alternate Functions
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
Port D Pins Orangutan Function
Notes/Alternate Functions
PD0
digital I/O
USART0 input pin (RXD0)
PD1
digital I/O
red user LED
(low turns LED on; connection
can be cut and replaced with jumper)
USART0 output pin (TXD0)
PD2
digital I/O
USART1 input pin (RXD1)
External interrupt 0 (INT0)
PD3
digital I/O
USART1 output pin (TXD1)
External interrupt 1 (INT1)
PD4
buzzer
Timer1 PWM output B (OC1B)
PD5
digital I/O
servo pulse output (SPWM)
Timer1 PWM output A (OC1A)
PD6
M2 speed control line
Timer2 PWM output B (OC2B)
PD7
M1 speed control line
Timer2 PWM output A (OC2A)
Misc. Pins
Orangutan Function
Notes/Alternate Functions
AREF
ADC reference pin
AVCC
supply voltage for Port A and ADC not accessible to the user
RESET
Reset input
reset button
(pressing resets MCU)
XTAL1
20 MHz resonator input
not accessible to the user
XTAL2
20 MHz resonator input
not accessible to the user
Pololu Orangutan SVP User’s Guide
© 2001–2019 Pololu Corporation
7. AVR Pin Assignment Table Sorted by Pin
Page 29 of 43
