i.MX7D: USB host only without supply 5V to USB_OTG_VBUS

cancel
Showing results for 
Search instead for 
Did you mean: 

i.MX7D: USB host only without supply 5V to USB_OTG_VBUS

276 Views
Contributor II

Hi,

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:

  • USB_OTG2_DP/DN:  Connect to MCU USB PD/DN
  • USB_OTG2_ID:         Tie to GND by 10k resistor for working as USB HOST
  • USB_OTG2_REXT:   Tie to GND by 200R resistor.
  • USB_OTG2_VBUS:   I don't now how to do with this pin in this case

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,

Dinh Huy

Labels (2)
2 Replies

27 Views
NXP TechSupport
NXP TechSupport

Hi DINH,

    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!

Best regards,

NXP TIC Weidong Sun

27 Views
Contributor II

Dear Mr. Weidong,

Thanks for your help.

Best regards,

Dinh Huy

0 Kudos