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Nexys 4 DDR shows up with two COM ports


Question

We use Nexys 4 DDR boards for testing our platform. While with most of the Windows host PCs there are no issues, with one of our clients' when the board is plugged in (using the supplied micro USB cable) it shows up as two COM ports under Windows's Device Manager. We suspect this is behind that we can't properly run Xilinx SDK programs on the board, the debugger looses the connection.

  1. Is it normal that the board shows up as two COM ports? (When the board is de-attached the ports disappear, so both are surely the single board.)
  2. If yes, can this cause issues? If now, how can we begin to troubleshoot the problem, what can possible be behind it?

Thank you in advance!

Edited by Zoltán Lehóczky
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