Mike Singer wrote:
> At 20 MHz PIC16F877A you have only 40 instructions per 10 microsecond
> period.

50 actually.  That should be enough to take a CPP capture interrupt and
compute the time since the last one, but it won't leave much for any other
processing.  If I remember right, there is a prescaler on the capture events
(don't have that manual in front of me here).  With 4x that gives you a
minimum of 200 instructions per event, which is quite a lot.


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