Hi, I'm wondering about the logic for the USB Host port supplying power, and your cct documentation
So just checking if anybody else is seeing this as an issue.
If the USB port is to be used as HOST and is to supply power, then there needs to be an external power supply capable of delivering the 0.5A on the USB Host +5V.
The LM2734 is capable of doing that from 7-12V
The comment on UOTGVBOF is I believe accurate - but erroneous in what it should do - the circuit has a bug, the IC1B/LMV3518 +/- inputs are switched around (easy to do - I've got +/- wrong way round before)
I verified it working with the DUE hardware. There is a software fix for disabling the UOTGVBOF hw processing so that a Vin>7V can be used, but its a kluge and OTG isn't then supported.
It seems to me the "Taijiuino_Pro_ArduinoDue_V1.1" has an approach that works (but I haven't tested the hw), however it doesn't detect in hw if the input drops below 7V
http://arduino.cc/forum/index.php/topic,140839.0.html
http://arduino.cc/forum/index.php/topic,135399.0.html