TI IO Expander TCA9539 is 0x74.
If we run sudo i2cdetect -r -y 8 with Xavier NX, it can’t detect 0x74 address.
The other devices are good.
( We also use the NX develop kit to detect it, that is identical.)
If we run sudo i2cdetect -r -y 8 with Nano, it can detect 0x74 address.
Do you mean this only happen on your custom board and not with devkit? If so, please compare your design with devkit (you can get the carrier schematic in DLC), and eliminate the possible risk points firstly.