> -----Original Message-----
> From: piclist-bounces@mit.edu 
> [mailto:piclist-bounces@mit.edu] On Behalf Of peter green
> Sent: Tuesday, November 07, 2006 12:48 PM
> To: Microcontroller discussion list - Public.
> Subject: RE: [PIC] USB device detected at wrong speed
> 
> 
> > I am working on my first USB/PIC project.  I have the PICDEM FSUSB 
> > demo board and have also built my own PCB.  I am trying to get the 
> > keyboard/mouse demo from microchip working.  This is the one that 
> > moves the mouse in a circle while sending "abcd" continuously.  It 
> > works on the demo board but not on mine.
> you should NOT be connecting VUSB to VBUS and by doing so you 
> may well have blown the chip,
> 
> normally the only thing that should be connected to Vusb is a 
> 220nf capacitor to ground (unless you disable the internal 
> 3.3V regulator).

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.

thanks,
--steve


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