Hi, Nvidia I have met on board USB hub enum failed. and list in [ On board USB Hub can not be detected - #8 by liumiao ] I found that, When the enum failed, the amplitude of USB_DP is a little lower than the amplitude of enum successful one(Using the same nano module and the same carrier board). Wh…

Hi, If you observe the signal issue on Nano module + default carrier board, please let us know and we will check. If it is specific to the custom carrier board, you can check if near components impacts the signal, or refer to the tuning guide to tun signals.

Hi, Please check the suggestion in [image] On board USB Hub can not be detected Jetson Nano Hi, We checked the log and the root hub got enumerated successfully: [ 1.109380] tegra-xusb 70090000.xusb: xHCI Host Controller [ 1.109397] tegra-xusb 70090000.xusb: new US…

Hi, DaneLLL we do not have common choke between module and on-board hub. I do not know why the signal amplitude is different in sometimes? Though the compliance test is PASS, Maybe it will fail in lower amplitude.

Hi, Another concern is the 2.4GHz radio interference. Probably it makes impact to signals. Could you check this?

Hi, DaneLLL I already disable the 2.4G Wifi module, and remove the choke between wifi & hub, however, the problem does not disappear.

Hi， DaneLLL I try to capture the waveform of enum and found that, the successful and the fail are very different, even in frequency, I do not know why? could you help me to check it? Thank you! [fail-1] [fail-2] [successful-1] [successful-2] BR//Liu Miao

Hi, Please check [image] On board USB Hub can not be detected Jetson Nano Hi, We think it is more like a hardware issue. There is an embedded hub on default carrier board, you may compare to it. And also check produce design guide. For tuning signals of roothub, you can…

Hi， DaneLLL As the attachment we post before，We followed the Schematic of the carrier board. Which make me confused is that, the same carrier board, the same module, when it failed, the SI of USB_DP to GND is worse than the successful ones. and , even more confused that, When it fail, the pulse of…

USB driving strength various from time to time

Robotics & Edge Computing Jetson Systems Jetson Nano

DaneLLL June 15, 2020, 11:12pm 3

Hi,
Please check the suggestion in

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USB driving strength various from time to time

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