User manual

EXT2
Pin # Signal Name Pin # Signal Name
1 3.3V 2 GND
3 RST 4 EXT2-4
5 EXT2-5 6 EXT2-6
7 EXT2-7 8 EXT2-8
9 EXT2-9 10 EXT2-10
11 USB_VBUSON 12 EXT2-12
13 EXT2-13 14 EXT2-14
15 EXT2-15 16 EXT2-16
17 EXT2-17 18 EXT2-18
19 EXT2-19 20 EXT2-20
21 EXT2-21 22 EXT2-22
23 EXT2-23 24 EXT2-24
25 EXT2-25 26 EXT2-26
27 EXT2-27 28 EXT2-28
29 EXT2-29 30 EXT2-20
31 EXT2-31 32 EXT2-32
33 EXT2-33 34 EXT2-34
35 EXT2-35 36 EXT2-36
37 EXT2-37 38 GND
39 GND 40 +5V
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