References

1. 1.ATmega4809 product page: https://www.microchip.com/wwwproducts/en/ATMEGA4809
2. 2.megaAVR® 0-Series Manual (DS40002015)
3. 3.ATmega3209/4809 - 48-pin Data Sheet megaAVR® 0-Series (DS40002016)
4. 4.ATmega4809 Xplained Pro web page: https://www.microchip.com/developmenttools/ProductDetails/atmega4809-xpro.