Can NVHS for PCIe x8 of AGX Xavier change from X8 to X4?

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
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1

Hello!
Can NVHS for PCIE x8 of AGX Xavier change from X8(NVHS0_TX[0:7]_N/P,NVHS0_SLVS_RX[0:7]_N/P ) to PCIE X4(NVHS0_TX[0:3]_N/P,NVHS0_SLVS_RX[0:3]) ? How to configure by software ？
Looking forward to your reply！

3

Hi,

No, Xavier series platform only support the configuration same as the devkit.

PCIe x8 also supports x4 devices.

4

If AGX Xavier is as endpoint，only use PCIE X4(connect NVHS0_TX[0:3]_N/P,NVHS0_SLVS_RX[0:3],not connect NVHS0_TX[4:7]_N/P,NVHS0_SLVS_RX[4:7]).Can Xavier support this situation ？
Thanks

6

Yes, it will work on Xavier

7

image
Does it means that it can not change from X8 to X4 directly by software configuration(EP or RC)?

8

Yes, the configuration should follow the devkit. If devkit is x8, then configuration on your board is x8.