Can i use a gpio as peripheral clk?

[wpceswpces]

Hello,NVIDIA experts:
I would like to ask how to generate a clock signal for UART-to-RS422 synchronous communication. Can it be aligned with the data if generated through GPIO? Is the baud clock PLLP_OUT0 available from the core board as a clock source, or are there any other possible methods?

[KevinFFF]

Hi wpceswpces,

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

Using SW method to generate GPIO-based clock is not recommended since it may caused high CPU overhead and timing inaccuracies.
Please just use PLLP_OUT0 as the clock source for your UART interface.