How can I switch between 1.8v to 3.3v of a GPIO pin in Jetson AGX Xavier?

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

Hi,

I am developing software to read and write on a GPIO pin for Jetson AGX Xavier. There are some GPIO pins on the AGX Xavier board which can be selected to operate at 1.8v or 3.3v. So, I want to know how this can be done via software. Any leads here are appreciated.

Thanks in advance!

-RK

3

hello rmandala,

there’s Jetson-IO tool to simplify the configuration of the I/Os exposed by the 40‑pin expansion header.
please check developer guide, Configuring the 40-Pin Expansion Header to enable Jetson-IO for pin configuration.
thanks

4

Hi Jerry,

Thanks for the quick reply, I went through this doc before I created this post but did not find the required answer. Maybe I overlooked the doc, could you please point me to the specific section that answers my question?

Also, in some other documents, I found that J514 header will do this work by shorting the respective pins. Please give some clarification on this so that I can move forward with my development. How the switching between 3.3v and 1.8v happen? through hardware settings or software commands.

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Thanks,
RK

5

hello rmandala,

there’s level shifter,
please also check application note, 40-Pin Expansion Header GPIO Usage Considerations for reference,
thanks