Support » Pololu A-Star 32U4 Robot Controller User’s Guide » 3. A-Star 32U4 Robot Controller with Raspberry Pi Bridge »
3.11. AVR Timers
The ATmega32U4 has 4 timers: Timer0, Timer1, Timer3, and Timer4. Each timer has a different set of features, as documented in the datasheet.
- Timer0 is used by the Arduino environment for timing-related functions like
- Timer1 is used by the A-Star 32U4 Arduino library for driving motors.
- Timer3 is not used by the A-Star 32U4 Arduino library and can be freely used for your own purposes.
- Timer4 is used by the A-Star 32U4 Arduino library for controlling the buzzer. The Buzzer pin must be connected to the adjacent digital pin 6 (PD7; Timer4 output OC4D) for this to work.