When developing a USB hub with the CY3654+P03 development kit why don't any devices show up in the device manager

Question: When developing a USB hub with the CY3654+P03 development kit why don't any devices show up in the device manager when plugged into the downstream ports?

 

Answer:

The CY3654D301 application board in the CY3654+P03 development kit is designed with port power switches on board.  The CY7C65113 doesn't have enough I/O to operate the power swithces, therefore power isn't never supplied to Vbus of the downstream ports.

If you jump the DAC[4] and DAC[5] pins on the CY3654D301 board to ground, then the power switches (active low) will supply power to the downstream ports.  This will enable bus powered downstream devices to operate and get recongnized.