The full list of functions for each pin is detailed in the table in section 4.1. Many of the IO pins carry alternative functions which are selected using the built-in multiplexer configuration which is all detailed in section 4 of the ATmega4809 datasheet: “4. In the case of UART2 this is via the first “alternative function” mapping of the IO pins. These are mapped onto the ATmega4809 MCU as follows:Īs you might now be thinking, what happened to UART 2? Well there are indeed four UARTs on the ATmega4809, so UART 0 and 2 pop out on the following IO pins:
Having now introduced the Arduino Nano Every in my previous post, this time I thought I’d turn to the additional serial ports.Īs I mentioned last time, the “out of the box” Arduino experience for the Nano Every has Serial attached to the USB serial line and Serial 1 representing the hardware UART on D0/D1.