DFRobot Mega 2560 V3.0 (Arduino Mega 2560 R3 Compatible)

NEW VERSION! This is the upgraded DFRduino Mega 2560 V3.0 which is now fully compatible with Arduino Mega 2560 R3. The Arduino Mega is a microcontroller board based on the ATmega2560. It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header and a reset button. It contains everything needed to support the microcontroller; Connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Mega is compatible with most shields designed for the Arduino Duemilanove, Diecimila or Uno.

One cool thing about our DFRduino microcontrollers is that the hearders with different colors are used to differentiate I/O ports in an relatively easy way:

Red indicates Power Section
Blue indicates Analog I/O
Green indicates Digital I/O.

This kind of correspondence match exactly the same with our sensors, making it even cooler and more user-friendly.

The R3 board enjoys following new features:

Added SDA and SCL pins that are close to AREF pin and two other new pins close to RESET pin, allowing voltage adaptation with IOREF. Our shields will be fully compatible both with the AVR boards operating @5V and Due @3.3V in future.
Improved RESET circuit
Replacing the Atmega 8U2 with Atmega 16U2 (datasheet)

Version history:

V3.1 - Choose the quartz crystals resonator to improve the timer and serial accuracy. Compared with ceramic crystals, quartz crystals get better temperature stability.

DFRobot Arduino Microcontrollers Series

Name	DFRduino UNO	DFRobot Leonardo	DFRobot Mega 2560	Romeo V2- an Arduino Robot Board	Romeo - an Arduino Robot Control Board with Motor Driver
SKU	DFR0216	DFR0221	DFR0191	DFR0225	DFR0004
Microcontroller	ATmega328p	ATmega32u4	ATmega2560	ATmega32U4	Atmega328
Working voltage	5V	5V	5V	5V	5V
CPU Frequency	16MHz	16MHz	16MHz	16MHz	16MHz
TIO ports / PWM	6 / 14	7 / 20	54 / 15	20 / 7	14 / 6
Analog inputs	6	12	16	12	8
UART	1	2	4	2	1
I2C	1	1	2	3	3
SPI	1	1	1	1	1
Interrupt pins	2	2	2	2	2
EEPROM[KB]	1	1	4	1	1
Flash[KB]	32	32	256	32	32
SRAM[KB]	2	2.5	8	2.5	2
USB	A-B USB cable	micro USB cable	A-B USB cable	micro USB cable	A-B USB cable
Dimension	755515mm	755515mm	1005315mm	898414mm	908014mm
Vin	7-12V	7-12V	7-12V	7-12V	7-12V
Price	$19.9	$19.9	$24.9	$34.95	$29.5
Weight（g）	45	50	70	80	80
IDE version	Arduino 1.0 and above	Arduino 1.0 and above	Arduino 1.0 and above	Arduino 1.0 and above	Arduino 1.0 and above
Feature	DFRduino UNO is fully compatible with Arduino UNO R3,suitable for Arduino beginner and hobbyists	DFRobot Leonardo is a low cost controller, integrated with Xbee and SPI. Suitable for low cost and communication demand of hobbyists	DFRduino Mega has 54 digital pins and 16 analog pins, 4 UART channels. Suitable for demands of vast sensors	Use ATmega32u4, 2 serial ports. Intergrated with Xbee socket and motor drivers	Arduino microcontroller with motor driver, communication ports, IO expansion ports, it can be used as the main controller of robots