The MEGA 2560 is legacy hardware. Production for the MEGA 2560 has ceased as of June 2016. This page serves as reference material.
The OSEPP™ Mega 2560 R3 Plus is the bigger brother to the OSEPP™ Uno board with more flash memory, more SRAM, more EEPROM, and more pins. This board is perfect for projects that require a lot of inputs/outputs or that require more complex programs that cannot fit into the smaller memory of the ATmega328P.
New in R3:
Added SCL/SDA pins next to AREF header
Added IOREF pin to power header
Replaced USB-B connector with more popular mini-USB connector
Added Molex connector for easy connect to OSEPP™ sensors and other I2C devices