The some hosts may often force the USB Device to go to low power modes. The best approach is to disable LPM just before the data transfer begins and keep it disabled until Data transfers are finished. All the other times LPM may be enabled to allow USB Certification
Thank you for your reply.
Is it mean that FX3 device can enable LPM only in idle time? But why does only 4 of 200 device will re-enumerates at the same USB controller(Hosts)? Most of them are good.
For more information please see CASE 3230941746 and [CASE 3239583050](https://secure.cypress.com/myaccount/?id=25&myCase=489394-3239583050)