Arduino Uno Pinout Atmega328P / Atmega328p Microcontroller Pinout Pin Configuration Features Datasheet - Before we really start, here is a comparison of the arduino pins with the pins of the atmega328p which might be useful for orientation:
Arduino Uno Pinout Atmega328P / Atmega328p Microcontroller Pinout Pin Configuration Features Datasheet - Before we really start, here is a comparison of the arduino pins with the pins of the atmega328p which might be useful for orientation: