We are working on a new design based on i.MX53QSB. I have one question regarding USB ports. There are one USB OTG and one USB Host port on i.MX53 chips as well as the QSB. However, QSB specifically design the board not to allow both USB ports to be connected in the same time. Does anyone know there are any issues inside USB ports of i.MX53 we have to avoid? We would like to prevent any drawback as early as possible. Any suggestion is well appreciated!