PaoloP:
Datasheet 328 e 328P --> http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-42735-8-bit-AVR-Microcontroller-ATmega328-328P_Datasheet.pdf
Datasheet 328PB --> http://ww1.microchip.com/downloads/en/DeviceDoc/Microchip%20AVR%20microcontroller%20ATmega328PB%20Data%20Sheet%2040001906B.pdf
Grazie Paolo, aggiunti al primo post. 