Arduino A000066

Arduino® UNO R3
8 / 13 Arduino® UNO R3 / Rev. 01 - 25/11/2021
4.6 Board Recovery
All Arduino boards have a built-in bootloader which allows flashing the board via USB. In case a sketch locks up the
processor and the board is not reachable anymore via USB it is possible to enter bootloader mode by double-
tapping the reset button right after power up.
5 Connector Pinouts
Pinout