Need help about camera regulators

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Orin
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22

Can you check enable it by sysfs debug node like below.

sudo su
cd /sys/kernel/debug/regulator/vdd_sys_en/regulator/
echo enable > state
23

Hi @ShaneCCC
this node is already enabled after system booted:
nvidia@nvidia-desktop:~$ sudo cat /sys/kernel/debug/regulator/vdd_sys_en/regulator/state
enabled

I tried also as you mentioned to echo enable to state node, but result is the same as before, I cannot get 1.2v output from pin 101 of P2 slot(HDR120-2x60-AP-5MM-P (QTH) )on the DVK.
Anything else can be a try? Thanks!

24

You may need to consult with your HW designer.

Thanks

25

Hi @ShaneCCC
I have done below test: I removed the adapter board and only keep the DVK board and I measured the pin 101 of P2 slot(HDR120-2x60-AP-5MM-P (QTH) )on the DVK directly while pin 101 is of 1v2 dvdd of camera, the measurement result is 0 voltage. Does this mean no 1.2v DVDD output from board? If so, can I say there is no relation with my adapter board because I already unplugged it from DVK board which means I still need to investigate why DVK board does not output 1.2V DVDD ? Since DVK is designed by Nvidia, does that mean I still need find help from Nvidia? Do you argree with me? Thanks

26

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Attached picture is PIN 101 of P2 slot(HDR120-2x60-AP-5MM-P (QTH) )on the DVK.

28

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I measured PIN 101 of slot marked with blue line.

30

Hi @ShaneCCC
Am I measuring the correct pin for DVDD 1.2V(vdd_sys_en) here with the pin 101?

31

Hi @ShaneCCC
I found some message in document it says as below when introducing pin 101:

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Here it says pin101 is “Unused Camera supply pin”, what does that mean? Does that mean this DVDD supply pin is invalid?

32

I am have HW engineer to check it.

Thanks

33

Hi @ShaneCCC
Thanks! Waiting for the reply of you got from your HW engineer. Thanks!

34

Jetson AGX Orin Developer Kit Carrier Board design files are available at Log in | NVIDIA Developer

Did you check them? Sanpshot below of Camera Connector

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35

which schematics is this?

36

Unused means it is not connected and it is not required. Does you camera module need 1.2V? You may have to derive it from 1V8 or 3V3 supplies, if needed.

37

Hi @sgursal
Thanks, the schematic snapshot I attached former is from our own adapter board.

38

Hi @sgursal
Yes my camera needs 1.2V, I was wishing use the 1.2V output from pin 101 of the camera interface of Orin DVK. Since you mentioned that pin 101 cannot output 1.2V as needed, then I need to talk internal to check if we can derive 1.2V from 1.8 or 3.3 as you said. BTW, I want to double confirm that it’s sure that the camera interface of AGX Orin DVK cannot output 1.2V for usage,right? Thanks!
Thanks!

40

1.2V is not available from Carrier Board.
Please refer to Nvidia Jetson AGX Xavier Series and Jetson Orin Series Camera Module Hardware Design Guide.

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and Nvidia Jetson AGX Orin Developer Kit Carrier Board Specification available in the design files Log in | NVIDIA Developer

41

Hi @sgursal
Thanks so much. Then I need to generate 1.2V from 1.8V or 3.3V of the Orin DVK board.

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