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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

Operating volt	CPU speed	Analog in/out	Digital IO/ PWM	EEPROM [KB]	SRAM [KB]	Flash [KB]	USB	UART
3.3 Volt	84 Mhz	12/2	54/12	–	96	512	2 micro	4

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

Operating volt	CPU speed	Analog in/out	Digital IO/ PWM	EEPROM [KB]	SRAM [KB]	Flash [KB]	USB	UART
3.3 Volt	48 Mhz	6/1	14/10	–	32	256	2 micro	2

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.

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