AVR-Chat

Hi Jose,

--- In AVR-Chat@yahoogroups.com, Jose Fuentes 
<josecarlosfuentes@y...> wrote:
> AT43USB355E price is u$4.50.  I am wondering if it
> would be an appropiate device to develop a mixing
> console with +32 knobs (potentiometers).  The device
> has to measure the knobs position (thruough the ADC)
> and send the values over USB.  Is AT43USB355E fast
> enough to this application?

I don't remember the part's exact specs anymore, but off-the-cuff, 
yes, I think it would be plenty fast.  The AVR part of it is 
identical feature-wise to a 90S8515 running at 12MHz, which is 
pretty respectable.  You'd need some sort of multiplexing to get all 
32 knobs into the part, though -- there are only 12 ADC channels.  
(4 banks of 8 or 3 banks of 11 might work well...)  The maximum ADC 
conversion speed is something in the ballpark of 100kHz, so with 32 
inputs you'd be looking at still being able to sample thousands of 
times per second -- plenty.

---Joel