On Fri, Jul 11, 2008 at 3:04 PM, William Chops Westfield <westfw@mac.com> wrote:
>
> On Jul 10, 2008, at 6:15 PM, Xiaofan Chen wrote:
>
>> There are firmware based USB implementations on the AVR but none of
>> them are USB compliant.
>
> In what ways are they not compliant?  (Aside from picking ID numbers
> and such out of thin air, probably.)  Not defending; just curious...
>
http://www.obdev.at/products/avrusb/index.html
"Fully USB 1.1 compliant low-speed device, except handling of
communication errors and electrical specifications."

So will you use it in a commercial project now? I would not.
If cost is a concern, I would go for low cost USB compliant
MCU like this one: PIC18F13K50/14K50.
http://forum.microchip.com/tm.aspx?m=347894

Xiaofan
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