What's the maximum number of usb devices could Jetson AGX Xavier handle?


I am working on a project with Jetson AGX, the project works with USB serial ports. I connected a usb hub to AGX and connected 12 devices to the hub (type A). I can see all of them by using “lsusb” command, however, there are only 9 ttyUSB listed (ttyUSB0 - ttyUSB8) by using “ls /dev/ttyUSB*” command.

What’s the maximum number of usb devices could it handle?

It depends on the USB devices. These is a constraint in end points:
USB3 xhci driver device count limitation - #2 by DaneLLL

Different devices take different end points. The constraint is 70.

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