xavier pcie endpoint mode

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

Where can I find more information regarding Xavier PCIE endpoint mode?

  1. Are there existing COTS cards/cable that I can use to test X86 PCIE host connecting to Xavier as endpoint?
  2. PIN assignment? For example, A2 A3 is VDD_12V, should that from a RC via cable, or Xavier handles it?
    I assume the cable will be responsible to connect TX to Xavier RX, right?

Thanks!

2

In Tegra Xavier - Nvidia - WikiChip
It talks about Xavier to Xavier communication via PCIE4.

I am wondering where can I buy that pcie4 cable/connector?

3

Hey I am also interested in purchasing the ‘NVIDIA approved and official PCIe txrx swap cable’, anyone have something compatibile from digikey or similar supplier?

4

Please refer to our download center. There should be Jetson AGX Xavier PCIe Endpoint Design Guidelines App Note which is helpful.

5

It’s helpful, but it feels a bit awkward for me to go and pay somebody to redesign the card, as simple as it is, when Nvidia has already done so Can Nvidia release models that I can just send to a board prototyping house instead of PDF files?

The closest I’ve found otherwise are cables from ADT-Link, they provide ‘null-modem’ cables that swap RX and TX, but they go against Nvidia’s suggestion about connecting power.

6

Hi WayneWWW.

Can you send me the link the pcb layout orcad layout & cadence 17.2 for PCIE endpoint.

602-83317-1000-A01.pdf

Thanks

7

Hi guo.tang,
Do your xavier pcie endpoint mode can work now ? And can your access all shared memory defined in the endpoint mode?

8

Hi All,
I’m also have the same question, is there any ready to buy tested cables/ adapter board available in market ? Is anybody tried with ADT-Link cables?

Thanks

9

I haven’t done a huge amount of testing. However, I was able to get the basic PCIe communication working over a R88SS cable from ADT-link. I was a bit concerned about how closely it matched the Nvidia spec, but it did work. I can make no guarantees however. I transferred a few bytes by hand with busybox and they arrived.

10

Do you mean to say that you used a R88NS cable? Looking at their website, an R88SS is stated as “PCI-E x8 ,goldfinger to goldfinger, Tx to Tx direct extension”, whereas the R88NS is “PCI-E x8 ,goldfinger to goldfinger, Tx to Rx signal swap”, which seems to swap TX and RX as needed.

11

You’re correct, I quoted the part incorrectly. I did, however, buy both cables because we also made a card to do the swap. So technically, I have tested both the straight-through and the signal-swap versions.

12

我通过别人推荐从淘宝店买的 ，稳定可靠。推荐给您https://item.taobao.com/item.htm?spm=a2oq0.12575281.0.0.50111deb83JuZI&ft=t&id=663203792843