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Pin usage reference
Stefan Wahren edited this page Apr 7, 2017
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2 revisions
Since ARM and VideoCore share the same pin space, the concurrent access on the same pins must be avoided. The Firmware DT blob already describe the pins which are used by the GPU firmware, but it's not very practical. So here is a reference table:
Pin RPi 1 RPi 1 RPi 1 RPi 1 RPi 1 RPi RPi RPi 2 RPi 3 RPi 3
A+ B r1 B r2 B+ CM 0 0 W B B CM
0 | | | CAM | | | | | | |
1 | | | CAM | | | | | | |
2 | | CAM | | | | | | | |
3 | | CAM | | | | | | | |
4 | | | | | | | | | |
5 | | CAM | CAM | | | | | | |
6 | | | | | | | | | |
7 | | | | | | | | | |
8 | | | | | | | | | |
9 | | | | | | | | | |
10 | | | | | | | | | |
11 | | | | | | | | | |
12 | | | | | | | | | |
13 | | | | | | | | | |
14 | | | | | | | | | |
15 | | | | | | | | | |
16 | | | | | | | | | |
17 | | | | | | | | | |
18 | | | | | | | | | |
19 | | | | | | | | | |
20 | | | | | | | | | |
21 | | | CAM | | | | | | |
22 | | | | | | | | | |
23 | | | | | | | | | |
24 | | | | | | | | | |
25 | | | | | | | | | |
26 | | | | | | | | | |
27 | | CAM | | | | | | | |
28 | CAM | | | CAM | | CAM | CAM | CAM | |
29 | CAM | | | CAM | | CAM | CAM | CAM | |
30 | | | | | | | | | |
31 | | | | | | | | | |
32 | CAM | | | CAM | | CAM | | CAM | |
33 | | | | | | | | | |
34 | | | | | | | | | |
35 | | | | | | | | | |
36 | | | | | | | | | |
37 | | | | | | | | | |
38 | | | | | | | | | |
39 | | | | | | | | | |
40 | AUD | AUD | AUD | AUD | | | CAM | AUD | AUD |
41 | CAM | | | CAM | | CAM | | CAM | AUD |
42 | | | | | | | | SMPS | |
43 | | | | | | | | SMPS | |
44 | | | | | | | CAM | | CAM |
45 | AUD | AUD | AUD | AUD | | | | AUD | CAM |
46 | | | | | | | | | SMPS | SMPS
47 | | | | | | | | | SMPS | SMPS
48 | | | | | | | | | |
49 | | | | | | | | | |
50 | | | | | | | | | |
51 | | | | | | | | | |
52 | | | | | | | | | |
53 | | | | | | | | | |