Jetson Xavier NX's endpoint capabilities

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
#1

Hey everyone,

Jetson TX2 was using a common clock infrastructure with no clock inputs, eventually making itself a “root-complex only” device. So far, I’m using it as a root-complex and it worked just great. However, I need a Jetson device as an endpoint now. I wonder if Xavier NX has that capability or not. What I mean is:

  • Does Xavier NX also uses common clock?
  • If so, can it have an outside clock fed into it?

Thanks for your time, everybody.
Cheers.

#3

TX2 chip have internal clock generator and HW design to use them not support outside clock fed.

#4

I guess you completely misunderstood me. I know TX2 have internal clock. It just needs other pcie devices to be in sync with its own clock. I wonder if Xavier NX has some other option (Either no-sync or a clock input for pcie). Because in this position TX2 can work as root complex only.

#8

Sure, NX support endpoint mode, please refer to PCIe chapter in DG: https://developer.nvidia.com/jetson-xavier-nx-product-design-guide-v10

#9

Hi can the NVIDIA Xavier NX be compiled as a PCIe End Point like the AGX Xavier? What are the use-cases where this makes sense to implement?

#10

I would love my Xavier NX DevKit could access i7 8565u whiskey Lake system RAM (maybe shared VRAM too?), better if it is bidirectional. I would like make this done via the M.2 Key E (PCIe 1x I think) or M.2 Key M (PCIe 4x I think).
PCIe 1x is fast enough even in PCIe 3.0 but if NX support PCI 4.0 on M.2 Key E connector it can rise 8Gb/s I think, I’m a begginer hobbyist so maybe it is just a crazy idea.