> Hi Peter, VUSB and VBUS are just too similar to each other!  Yes, that
> is one of the first problems I found and it did blow up the USB section
> of the first chip.   I see that I failed to note that change in the
> "changes for rev 1.1" notes on the schematic but rest assured it's been
> fixed on the board itself.  I replaced the PIC with a new one and that
> got me from nothing at all, to the current state of partial enumeration.
ok, another thing to check, by default the microchip code is set up for bus sense IO, you do not seem to have such a circuit on your board, reading a floating input could well be the cause of strange results.

also i have discovered that putting a drain resistor on the main power rails considerablly improves reliability of startup.

also the caps are physically close to the chip right?

finally i see while you've put in the low value, low esr close to the chip part of decoupling you don't have any large cap on the power rails, a quick search for the regulator you are using says that it should have a 22uf cap on its output.



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