Arduino open source single board computer boards arduino a000062 the arduino due is the newcomer microcontroller board in the arduino boards family it is the first board based on a 32 bit arm core processor the atmel sam3x8e arm cortex m3 mcu that improves on all the standard arduino functionalities and adds more new features the due offers 54x digital inputoutput pins of which 12 can be used as pwm outputs with selectable resolution 12 analog inputs with 12 bit of resolution 4 uar