upd720202 USB unstable w/ USB WIFI module


We use upd720202 USB signals to connect a USB WIFI module (Sierra EM7455/7430).

This WIFI module could be detected but suddenly disappeared when browsing internet.

Then module will re-connect after few seconds.

We jump USB signals from WIFI module to CPU original USB port and it's works normal.

We also jump upd720202 USB signals to a USB connector and connect a USB stick and it works.

Please help clarify this what points we could check or the upd720202 image setting need to be correct