So just checking if anybody else is seeing this as an issue. Hi, I'm wondering about the logic for the USB Host port supplying power, and your cct documentation And the PDF, well it's spiffiest with java enabled, if you like to live on the wild side. Warning: I was using this exercise as an excuse to test-drive Altium2013.

Let me know if posting this breaks any rules, and down it'll come. Most folks might benefit from the PDF, of which Altium does a pretty nice job. I believe that everything stayed in sync (at least the compiler says so, no net-list changes). I took the liberty to arrange the sch as I'm accustomed. Perhaps somebody else will find it useful. Calling pull-up resistors on the TWI 'I2C Voltage Translators' is a bit imaginative (oooh, a pun!). Things to notice: Vin's (power header) reverse-polarity protection is limited due to L6 IC1B is not an analog comparator, but an amp with wide Vin+/- spec, configured as an open-loop comparator, driving T1 (Montgomery 'Scotty' Scott would have issues with this). The effective net-list remains unchanged.

: SCH: Added hyperlinks to some key parts. Added a couple of internal layers and moved a few tracks to those layers accordingly. : PCB import process squashed everything into two layers. : Added info about AVREF selection to the schematic.

Altium schematic to pdf