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iMX6 USB Host and OTG

Question asked by Atilla Mete Turedi on Mar 30, 2016
Latest reply on Apr 1, 2016 by Artur Petukhov

Greetings,

 

This is the first time I am designing a board with USB so I would like to hear your opinion on the setup I built for iMX6Q USB Host and OTG applications.

 

-I am using SWBST of PF0100 to get the 5V necessary for the USB_OTG_VBUS and USB_H1_VBUS. USB_

-OTG_VBUS is directly connected to the boost regulator output.

-USB_H1_VBUS is connected to the boost regulator output through a switch and from there it is connected to the VBUS of Type A connector.

-USB MINI AB connector VBUS is connected to the boost regulator output over a switch so I can comply with the specifications.

-Both switches are limited to 100mA overcurrent detection so no device can draw more than that.

 

Below are the schematics to my design which I based on Sabre and some other boards;

 

USB1.PNGUSB2.PNGUSB3.PNG

 

What do you guys think about the validity of the design. Also do you think 100 mA current limit I set would be a problem when I am using the USB OTG for serial downloader during boot operation?

 

Thanks in advance,

 

Regards,

Mete

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