Arduino® Mega 2560 board

The Arduino® Mega 2560 is an exemplary development board dedicated for building extensive applications as compared to other maker boards by Arduino. The board accommodates the ATmega2560 microcontroller, which operates at a frequency of 16 MHz. The board contains 54 digital input/output pins, 16 analog inputs, 4 UARTs (hardware serial ports), a USB connection, a power jack, an ICSP header, and a reset button. Target Areas 3D Printing, Robotics, Maker 

Features:

ATmega2560 Processor

    Up to 16 MIPS
    Throughput at 16MHz 256k bytes (of which 8k is used for the bootloader)
    4k bytes EEPROM 8k bytes Internal SRAM
    32 × 8 General Purpose Working Registers
    Real Time Counter with Separate Oscillator
    Four 8-bit PWM Channels
    Four Programmable Serial
    USART Controller/Peripheral SPI Serial Interface
ATmega16U2
    Up to 16 MIPS
    Throughput at 16 MHz 16k bytes
    ISP Flash Memory 512 bytes
    EEPROM 512 bytes SRAM USART with SPI master only mode and hardware flow control (RTS/CTS)
    Master/Slave SPI Serial Interface
Sleep Modes
    Idle
    ADC
    Noise Reduction
    Power-save
    Power-down
    Standby
    Extended
    Standby
Power
    USB Connection
    External AC/DC Adapter
I/O
    54 Digital 16 Analog
    15 PWM Output