DFRobot - DFRduino Mega (Arduino Mega)

DFRduino Mega is 100% same as the original Arduino Mega.

The Arduino Mega is a microcontroller board based on the ATmega1280. 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; simply 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 or Diecimila.

Summary

• Microcontroller: ATmega1280
• Operating Voltage: 5V
• Input Voltage (recommended): 7-12V
• Input Voltage (limits) 6-20V
• Digital I/O Pins 54 (of which 14 provide PWM output)
• Analog Input Pins 16
• DC Current per I/O Pin 40 mA
• DC Current for 3.3V Pin 50 mA
• Flash Memory 128 KB of which 4 KB used by bootloader
• SRAM 8 KB
• EEPROM 4 KB
• Clock Speed 16 MHz

Shield Compatibility

The Mega is designed to be compatible with most shields designed for the Diecimila or Duemilanove. Digital pins 0 to 13 (and the adjacent AREF and GND pins), analog inputs 0 to 5, the power header, and ICSP header are all in equivalent locations. Further the main UART (serial port) is located on the same pins (0 and 1), as are external interrupts 0 and 1 (pins 2 and 3 respectively). SPI is available through the ICSP header on both the Mega and Duemilanove / Diecimila. Please note that I2C is not located on the same pins on the Mega (20 and 21) as the Duemilanove / Diecimila (analog inputs 4 and 5).