Pololu Orangutan SVP - Manual (Page 24)

6. AVR Pin Assignment Table Sorted by Function
Function ATmega324/1284 Pin
free analog input and digital I/O (x8) PA0 – PA7
free digital I/O (x8) PB3, PC0, PC1, PD0 – PD4, PD5**
free digital output PB4*
free PWM outputs (x2) PB3, PB4
red user LED PD1
green user LED PC4
UART0 PD0, PD1
UART1 PD2, PD3
user pushbuttons (bottom to top, x3) PC2, PC3, PC5
motor 1 (direction, speed) PC7, PD7
motor 2 (direction, speed) PC6, PD6
buzzer PD4
LCD control (RS, R/W, E) PB0, PB1, PB2
LCD data (4-bit: DB4 – DB7) PC2 – PC5
SPI auxiliary processor control lines (x3) PB5, PB6, PB7
ICSP programming lines (x3) PB5, PB6, PB7
ADC reference pin AREF
reset pushbutton RESET
*: Using PB4/SS as an input will interfere with communication to the auxiliary processor, so we recommend using
it as a digital output. See
Section 3.j of the Pololu USB AVR C/C++ User’s Guide for more information.
**: PD5 is a free digital I/O unless you want to use the built-in servo pulse hardware.
Pololu Orangutan SVP User's Guide © 2001–2012 Pololu Corporation
6. AVR Pin Assignment Table Sorted by Function Page 24 of 37