PCI 3.0 on TX2

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi,

I am trying to use a edgeTPU module using a PCI on TX2.
Reading this specification, it seems like the TX2 conforms to PCI Express Base Specification Revision 2.0 - section 4.3.
Coral says:
Capture

Is it incompatible? I have read that the TX2 has interrupts on the PCI, but does it requires 3.0 PCI specs to work?

Thanks in advance,

P

3

Please go ahead and try. It should work without any issues.

4

Ok thanks.

I have, but the custom carrier board used with the TX2 hasn’t been finalised for it yet, so was wondering if the problem was coming from TX2 itself too…

5

I know Xavier really boosted things and handles up to PCIe gen. 4. From what I can tell the TX2 only supports gen. 2. See:
https://elinux.org/Jetson_TX2

The TX2 is rather old, the NX is a similar form factor so far as the module goes, but much more modern:
https://elinux.org/Jetson_Xavier_NX

I also have to add that actually achieving a particular generation’s speed on a PCIe bus requires proper design. If signal quality is not sufficient, then the bus will slow down to a slower generation’s speed. Not many devices actually achieve gen. 4, but gen. 3 is commonly reached (although there are a number of devices which might end up throttling back to gen. 2).

Note: The Nano is the same gen. 2 as the TX2.