> I am having hard time to generate accurate 46.27 microseconds
> interrupt

If you need each interrupt pair to have exactly that spacing you will
likely need a weird xtal frequency.

But if you only need the average frequency to be that value you could
use a corrective technique (is that what is called a phase accumulator?)
to get an interrupt every 46 us and every now and then postpone then
next interrupt one ms more. But I think you will need to use a counter
as RTC to do check the interrupt moments against real time, because of
the varying interrupt latency.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products

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