On the Jetson Orin Nano, what are the differences between I2C0,1,2 and the camera I2C (besides the voltage levels)
Different I2C busses use different frequencies and GPIO controllers, you can find those by looking at the properties inside sources/hardware/nvidia/soc/t23x/kernel-dts/tegra234-soc/tegra234-soc-i2c.dtsi.
I2C0 = 400kHz, main
I2C1 = 100kHz, AON
I2C2 (I think it’s I2C7 in that file) = 400kHz, AON
CSI I2C = 400kHz, main
Hi there, what is meant by AON or main?
That’s power domain.
How does the power domain affect the functionality and how we select which interface is used for what?
Generally no difference. You can just follow Design Guide to choose one of them.
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