The AM335x CPU has two USB signals: USB0 and USB1. MYIR's MYD-AM335X development board has total 5 USB port including the 1 USB OTG port. We have used USB Hub chip USB2514 on our board to extend USB1 to 4 channels. The USB OTG is connected to the USB0 signal. So there are total 5 USB can be used on the MYD-AM335x board.
You may don't need so 4 USB Host, you can tailor to your requirement. For example, if you only need to use one USB Host, you need only connect USB to USB1_DM and USB1_DP, plus the USB1_DRVVBUS driver that's OK. The USB1_ID is connected to GND.
AM335x has two USB signals
AM335x USB pin list
MYD-AM335X USB OTG
MYD-AM335X USB Host
MYD-AM335X USB Host driver circuit
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