How to power enable SD card VDD through GPIO on Jetson Xavier NX

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
, ,
1

Hi

I am trying to design a carrier board for Jetson NX.

From the NVIDIA Jetson Xavier NX Design Guide, I realized that a SDCard VDD has to be controled from a GPIO on Jetson NX in order to work correctly on a warm boot. As is shown in the picture attached:

Screen Shot 2021-11-30 at 16.39.50
Screen Shot 2021-11-30 at 16.39.501696×1210 310 KB

Can I choose any GPIO on Jetson Xavier NX or this has to be a certain one of the chip.

Moreover, how can I configure the GPIOs to control the VDD pin of the SDCard, I assume it could be done with BIOS but I could not find any instructions to this issue.

Please help me with it or tell me where can I find the instructions to this problem.

3

There is no BIOS on jetson. This is configured by the kernel device tree.

Search “sdmmc3” on this forum and you will find lots of topics duplicated as your case.

5

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.