Arduino - Due & Zero

The Arduino Due is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU. It is the first Arduino board based on a 32-bit ARM core microcontroller. Important features −

It has 54 digital input/output pins (of which 12 can be used as PWM outputs) 12 analog inputs 4 UARTs (hardware serial ports) 84 MHz clock, an USB OTG capable connection 2 DAC (digital to analog), 2 TWI, a power jack, an SPI header, a JTAG header Reset button and an erase button

Characteristics of the Arduino Due Board

Communication

4 Hardware UARTs
2 I2C
1 CAN Interface (Automotive communication protocol)
1 SPI
1 Interface JTAG (10 pin)
1 USB Host (like as Leonardo)
1 Programming Port

Unlike most Arduino boards, the Arduino Due board runs at 3.3V. The maximum voltage that the I/O pins can tolerate is 3.3V. Applying voltages higher than 3.3V to any I/O pin could damage the board.
The board contains everything needed to support the microcontroller. You can simply connect it to a computer with a micro-USB cable or power it with an AC-to-DC adapter or battery to get started. The Due is compatible with all Arduino shields that work at 3.3V.

Arduino Zero

The Zero is a simple and powerful 32-bit extension of the platform established by the UNO. The Zero board expands the family by providing increased performance, enabling a variety of project opportunities for devices, and acts as a great educational tool for learning about 32-bit application development.
Important features are −

The Zero applications span from smart IoT devices, wearable technology, high-tech automation, to crazy robotics.
The board is powered by Atmel’s SAMD21 MCU, which features a 32-bit ARM Cortex® M0+ core.
One of its most important features is Atmel’s Embedded Debugger (EDBG), which provides a full debug interface without the need for additional hardware, significantly increasing the ease-of-use for software debugging.
EDBG also supports a virtual COM port that can be used for device and bootloader programming.

Characteristics of the Arduino Zero board

Unlike most Arduino and Genuino boards, the Zero runs at 3.3V. The maximum voltage that the I/O pins can tolerate is 3.3V. Applying voltages higher than 3.3V to any I/O pin could damage the board.

The board contains everything needed to support the microcontroller. You can simply connect it to a computer with a micro-USB cable or power it with an AC-to-DC adapter or a battery to get started. The Zero is compatible with all the shields that work at 3.3V.