Microcontroller:AT91SAM3X8E LQFP-144
Operation Voltage:3.3V
Input voltage:5V
Total connector pins:44 + 44 + 28 = 116Pins
Flash:2 x 256 Kbytes
SRAM:64 + 32 Kbytes
Clock Speed:84 MHz
Number of PIOs:103
NAND Flash Controller (NFC):Yes
SHDN Pin:Yes
EMAC:MII/RMII
External Bus Interface:16-bit data / 8 chip selects / 23-bit address
Central DMA:6
12-bit ADC:16 ch
12-bit DAC:2 ch
32-bit Timer:9 ch
PDC Channels:17
USART/UART:3 / 2 (USART3 in UART mode (RXD3 and TXD3 available))
SPI:1 SPI controller,4 chip selects +3 USART with SPI mode
HSMCI:1 slot, 8 bits
Clock Speed:84 MHz
Board dimension:54 x 58mm

Arduino resource support : *** arduino.cc/en/Main/ArduinoBoardDue