Jetson Nano Developer Kit 40-Pin Expansion Header Configuration

Hello. I’m using Jetson Nano 2GB, model P3541 with JetPack 4.6 (L4T 32.6.1).
I need to change some default settings for some pins, e.g. to disable Pull-Up/Pull-Down at startup. Looking through the documentation and trying to follow it I was a little bit confused. In details:

  1. I’ve found the document “Jetson Nano Developer Kit 40-Pin Expansion Header Configuration” ( It describes how to change the configuration but all of it belongs to L4T release 32.1. And it describes how to do it for the model “p3450-porg”, which is absent in L4T 32.6.1. More over, my model (P3541) is absent in the “tegra-pinmux-script” tool (GitHub - NVIDIA/tegra-pinmux-scripts: Scripts to auto-generate pin mux drivers and board configuration tables for Tegra SoCs and boards). So, I cannot even do something in the likeness.
  2. The provided Jetson Nano Developer Kit Pinmux Spreadsheet ( assumes L4T 32.2.x. I don’t know if I can use it for L4T 32.6.1.

My questions are:

  • Where can I find the mentioned above but up-to-day documentation?
  • Is there any tool, which can simply disable Pull-Up/Pull-Down for pins or any way to do it in a program (C/C++)?
  • May be someone can just describe…

Sorry for my English,
with hope for help,

Rather ask in the Jetson forum
this one is about the x86 graphics driver.