Can I use interface PCIe 1 for connecting another GLAN chip?

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Hi All,
I see there are pins for PCIe one on Jetson nano module. Please see the picture below.

  1. Can I use these pins for connecting another GLAN chip?
  2. Where can I get the data sheet of RTL8119I-CG ?

Many Thanks.

  1. No, it is reserved and should not be used.
  2. Please check with vendor, Realtek, for the datasheet.