Two unknown devices always show up when using the CY3654+P03 dev kit

Question: When using the CY3654+P03 development system to develop a hub, or compound device (such as a keyboard hub), two unknown devices always show up in the device manager?

 

Answer:

The CY3654D301 application board in the CY3654+P03 dev kit only has two physical USB ports.  The other two USB port data signals (D+ and D- for ports 3 and 4) are not brought out and are left floating.  Since these signals are floating the hub may report to the host that there are devices connected.

To fix this the developer can ground the four data dignals which are brought out to TP9, TP10, TP11, and TP12 on the CY3654D301  board.