Yorck von Collani wrote:
>
> Thanks for the answer.
>
> Yes, 10-20 us is the time I have measured, so I have to use an external timer.
>
Pure illusion the jitter will remain the same as that of any internal
timer.
Just send a square wave to a pin of the parallel port and grab it with
an RT interrupt handler send it back to a scope by outb, wich adds just
a couple of us uncertainty, and you'll see that you have the same jitter
for the same computer load.
The jitter is embedded in the hardware architecture not in
external/internal chips.
Ciao, Paolo.
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