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USB OTG with two USB connectors on-board

Question asked by Giuseppe Modugno on Feb 27, 2014
Latest reply on Mar 9, 2014 by Kan_Li

I'm designing a new board based on Kinetis K20 microcontroller. I'd like to have a board with two USB connector: a micro USB type-B receptacle for a PC connection and a USB type-A receptacle for pendrive.

 

I'm thinking about the following schematic:

Clipboard01.png

The MCU is self-powered so the power supply from PC is used only for sensing its presence for two purposes: switch the USB stack in host-mode and disable the power supply to the pendrive (if any is connected).

 

The pendrive can be inserted directly in the USB type-A receptacle on the board, the PC can be connected with a normal micro USB cable.

 

What do you think? Will it work?

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