Are the UART ports on the Jetson Nano able to be disabled and does that port become floating or high impedance when disabled?

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano
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We need to determine the state of that port when it is disabled and how it will affect what it is connected to. Thanks in advance.

3

Hi jacob.cayetano,

Are you using the devkit or custom board for Jetson Nano?
What’s the Jetpack version in use?

Are the UART ports on the Jetson Nano able to be disabled and does that port become floating or high impedance when disabled?

Yes, you can configure the pin usage/state from the pinmux spreadsheet and also disable the related UART node in device tree.

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We are using the Jetson Nano in a custom board with Jetpack 6.0.

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Jetson Nano does not support Jetpack 6.
Do you mean that you are using Jetson Orin Nano?

Please share the result of the following command on your board.

$ cat /etc/nv_boot_control.conf
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My apologies, we are indeed using a Jetson Orin Nano.

The results of that command are as follows:

TNSPEC 3767-300-0005-M.1-1-0-jetson-orin-nano-devkit-
COMPATIBLE_SPEC 3767–0005–1–jetson-orin-nano-devkit-
TEGRA_BOOT_STORAGE mmcblk0
TEGRA_CHIPID 0x23
TEGRA_OTA_BOOT_DEVICE /dev/mtdblock0
TEGRA_OTA_GPT_DEVICE /dev/mtdblock0

7

Okay, I’ve moved your topic to correct category for Orin Nano.

Please just configure the pin state in pinmux spreadsheet.

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