I'm design device of i.MX7D as a USB host only (USB_OTG2), which connect to an MCU as a USB device in same PCB board. The USB signal runs without 5V of USB.
USB_OTG2 has delicated pin:
Please guide me a solution for this case (I don't want to add an 5V power to pin USB_OTG_VBUS)
Thanks and best regards,
USB_OTG2_VBUS must be supplied by 5V, because the VBUS is input of internal USB LDO , and USB LDO will output 3.3V for USB PHY.
so you should connect 5V power to USB_OTG2_VBUS.
Have a nice day!
NXP TIC Weidong Sun