Skip to content

Pin usage reference

Stefan Wahren edited this page Apr 7, 2017 · 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  |       |       |       |       |       |       |       |       |       |
Clone this wiki locally