Custom Carrier Board - Jetson Xavier NX (USB3.0 problem)

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
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1

Hi,

I have designed a custom carrier board for Jetson Xavier NX. All peripherals are functioning perfectly, all power supplies are stable; however, I am facing an issue with the USB 3.0 protocol. I have used the Microchip USB5744/2G for the USB Hub. The problem is that only the 2.0 protocol is working, while the 3.0 protocol is not. I suspect the issue lies in the connection of the SSRX and SSTX signals between the USB Hub and the Jetson Xavier NX. I will attach the relevant parts of the schematic for this, and I need your assistance in resolving this issue. The documentation for the USB Hub does not specify whether its upstream pins are inputs or outputs, so I connected them as shown in the schematic.

Jetson-Part
Jetson-Part1056×367 37.1 KB

USB Hub - Part
USB Hub - Part1070×672 47.1 KB

Thank you in advance,
Zelimir

3

Hi, you should check with the HUB vendor for that first.

5

software change is required if your design does not match to original NV devkit board.

document:
https://docs.nvidia.com/jetson/archives/r35.5.0/DeveloperGuide/HR/JetsonModuleAdaptationAndBringUp/JetsonAgxOrinSeries.html?highlight=adaptation#porting-the-universal-serial-bus

6

I contacted Microchip Support, and they don’t see any mistakes in the design, which is very strange. I’m wondering if there’s a software way to change the SSRX and SSTX differential pairs?

7

Hi,

Could you tell me what software changes are necessary? I still haven’t been able to figure out what the issue is.

8

HI,

Could you tell me what software changes are necessary? I still haven’t been able to figure out what the issue is.