[sdiy] super cheap synthisizers

[René Schmitz]

At 15:53 11.06.02 +0200, Ingo Debus wrote:
>Ugh. Are AVRs really that fast?

CPI (cycles per instruction) is nearly one. They are faster than 
the 8051 or the PICs (at least those I'm familiar with, which have 
four clock cycles per instruction.) 

>Can it still process incoming MIDI now and then?

If the timer ran slow enough (1Mhz is probably too fast), and the 
timer routine being short there would be enough cycles left to run 
a main routine that would process the UART bytes. 

>Using a 12 Mhz 8051 clone (shortest instruction execution time 1
>microsecond) right now I'm not even dreaming of that speed. But then
>it's fast enough for my purpose.

The AVR would deliver the same speed at 1Mhz.

Cheers,
 René
-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159