"Ohtsji, Randie" wrote:
>
> Is my interrupt routine too long?
>
> 9469 baud = 105uSec
>
> 20MHz = 50nSec x 4 clock/cycle = 200nSec per cycle
>
> Don't I have 500+ cycles to do stuff before receiving the next bit?
>


5 cycles per uS, and 525 between interrupts. You shouldnt take that long
though, you risk missing the int, and that's a LONG routine!   Isrs
should be short :)