The Jetson Orin Nx’s UART1 port is what we are using for the Bluetooth module. And planned to use the RTS & CTS pins as a GPIO function for operating the IR transmitter & receiver modules. And the GPIO needs to operate in a frequency of 38-56KHz.
Is there any issue that will happen if we operate both Bluetooth Module & IR Transmitter, Receiver Modules ?
Can this pin be used with this operating frequency while the UART is active?
*Note we don’t have a PWM free pins.
Hi roshan.raju,
Are you using the devkit or custom board for Orin NX?
What’s the Jetpack version in use?
Do you mean PIN15, PIN32, PIN33 of 40-pins expansion header are all used for other functions?
Hi Kevin,
We are designing a custom board for Orin NX. For the software development activities, we are using the EVAL, 945-13766-0007-000, Nvidia Jetson Orin Nano Developer Kit.
What’s the Jetpack version in use?
jetpack6 r36.3 kernel:5.15.136-tegra OS:ubuntu 22.04.4 LTS
Do you want to use above pins as GPIO?
Yes we need to use these pins as GPIO
Do you mean PIN15, PIN32, PIN33 of 40-pins expansion header are all used for other functions?
Yes, those pins used to drive other PWM based peripherals.
Hi christo.jose,
Are you working with roshan.raju?
Please share the result of the following command on your board.
$ cat /etc/nv_boot_control.conf
Those pins are configured as GPIO in pinmux spreadsheet by default.
You can just using them in your application but we don’t verify how’s the frequency they could achieve.
Hi Kevin,
Are you working with roshan.raju?
Yes, we are working in team, from HW side.
Please share the result of the following command on your board. "$ cat /etc/nv_boot_control.conf "
Please find the result
atsu@tegra-ubuntu:~$ cat /etc/nv_boot_control.conf
TNSPEC 3767-300-0001-R.1-1-0-jetson-orin-nano-devkit-
COMPATIBLE_SPEC 3767–0001–1–jetson-orin-nano-devkit-
TEGRA_BOOT_STORAGE nvme0n1
TEGRA_CHIPID 0x23
TEGRA_OTA_BOOT_DEVICE /dev/mtdblock0
TEGRA_OTA_GPT_DEVICE /dev/mtdblock0
atsu@tegra-ubuntu:~$
Can we use these pins as GPIO while the UART is active?
Sure you can.
If you don’t have the requirement to enable HW flow control for UART, you can just use them(RTS/CTS pins) as GPIO.
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