https://store.arduino.cc/due

Microcontroller: AT91SAM3X8E
IO voltage: 3.3V

IO Pin Specifications (for VDDIO = 3.3V)

IO pin input high voltage : min 0.7 x VDDIO to max VDDIO + 0.3V
IO pin input low voltage : min -0.3V to max 0.3 x VDDIO

IO pin output high voltage : min VDDIO – 0.4V
IO pin output low voltage : max 0.4V

Digital IO pins are NOT compatible with 5V input signals!

Power

Power in: From the USB connectors (5V) or the DC plug (7-12V)

5V DCDC reg: LM2734Y, 1A output current rated

3V3 Linear reg: NCP1117ST33T3G-3V3, 1A output current rated (we’ve not confirmed Arduino PCB heatsinking capability for this)

IO Pins

Pins sink 6mA or 9mA

Pins source 3mA or 15mA

0   PA8          RX0
1   PA9          TX0                      (15mA source output)
2   PB25         Digital Pin 2
3   PC28         Digital Pin 3            (15mA source output)
4   PA29 and PC26   Digital Pin 4         (15mA source output) 
5   PC25         Digital Pin 5            (15mA source output) 
6   PC24         Digital Pin 6            (15mA source output) 
7   PC23         Digital Pin 7            (15mA source output) 
8   PC22         Digital Pin 8            (15mA source output) 
9   PC21         Digital Pin 9            (15mA source output) 
10   PA28 and PC29   Digital Pin 10       (15mA source output) 
11   PD7          Digital Pin 11          (15mA source output) 
12   PD8          Digital Pin 12          (15mA source output) 
13   PB27   Digital Pin 13 / Amber LED "L"
14   PD4          TX3                     (15mA source output) 
15   PD5           X3                     (15mA source output) 
16   PA13         TX2
17   PA12         RX2
18   PA11         TX1
19   PA10         RX1
20   PB12         SDA
21   PB13         SCL
22   PB26         Digital Pin 22
23   PA14         Digital Pin 23          (15mA source output) 
24   PA15         Digital Pin 24          (15mA source output) 
25   PD0          Digital Pin 25          (15mA source output) 
26   PD1          Digital pin 26          (15mA source output) 
27   PD2          Digital Pin 27          (15mA source output) 
28   PD3          Digital Pin 28          (15mA source output) 
29   PD6          Digital Pin 29          (15mA source output) 
30   PD9          Digital Pin 30          (15mA source output) 
31   PA7          Digital Pin 31          (15mA source output) 
32   PD10         Digital Pin 32
33   PC1          Digital Pin 33          (15mA source output) 
34   PC2          Digital Pin 34          (15mA source output) 
35   PC3          Digital Pin 35          (15mA source output) 
36   PC4          Digital Pin 36          (15mA source output) 
37   PC5          Digital Pin 37          (15mA source output) 
38   PC6          Digital Pin 38          (15mA source output) 
39   PC7          Digital Pin 39          (15mA source output) 
40   PC8          Digital Pin 40          (15mA source output) 
41   PC9          Digital Pin 41          (15mA source output) 
42   PA19         Digital Pin 42          (15mA source output) 
43   PA20         Digital Pin 43
44   PC19         Digital Pin 44          (15mA source output) 
45   PC18         Digital Pin 45          (15mA source output) 
46   PC17         Digital Pin 46          (15mA source output) 
47   PC16         Digital Pin 47          (15mA source output) 
48   PC15         Digital Pin 48          (15mA source output) 
49   PC14         Digital Pin 49          (15mA source output) 
50   PC13         Digital Pin 50          (15mA source output) 
51   PC12         Digital Pin 51          (15mA source output) 
52   PB21         Digital Pin 52
53   PB14         Digital Pin 53          (15mA source output) 
54   PA16         Analog In 0
55   PA24         Analog In 1
56   PA23         Analog In 2
57   PA22         Analog In 3
58   PA6          Analog In 4
59   PA4          Analog In 5
60   PA3          Analog In 6
61   PA2          Analog In 7
62   PB17         Analog In 8
63   PB18         Analog In 9
64   PB19         Analog In 10
65   PB20         Analog In 11
66   PB15         DAC0
67   PB16         DAC1
68   PA1          CANRX
69   PA0          CANTX                 (15mA source output) 
70   PA17         SDA1
71   PA18         SCL2                  (15mA source output) 
72   PC30         LED "RX"
73   PA21         LED "TX"
74   PA25         (MISO)                (15mA source output) 
75   PA26         (MOSI)                (15mA source output) 
76   PA27         (SCLK)                (15mA source output) 
77   PA28         (NPCS0)               (15mA source output) 
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