Eduard Razumovsky

USB demo on TWRK64F120M with HUB

Discussion created by Eduard Razumovsky on May 4, 2016
Latest reply on May 4, 2016 by EARL GOODRICH



Does the demo keyboard should work also with HUB ?

When connecting directly the keyboard to K64 USB port it works everything OK (can see keyboard using terminal thru UART)

Now, I have connected the K64 USB to a HUB (Microchip USB2422) and a keyboard to the HUB downstream USB port.

The USB2422 HUB have "Power_EN" ports to enable power to it's downstream ports

My problem is that there is no "Power_EN" from the HUB to its downstream ports in that case

I have tried other HOST - connected the HUB upstream port to a PC (instead of the K64) - in that case everything works great - The HUB enables power to downstream ports

What can be the difference between the K64 and the PC ?