You want really slow time delays, using sleep, correct?

My best suggestion on this one is to use an external clock generation
circuit.  Feed that into the CLOCKIN input, and feed it through several
hardware dividers.  You'll be able to drop the frequency by a few orders of
magnitude, then feed it into one of the counter inputs, which have
associated interrupts that operate in sleep mode.

Not all htat elegant as PIC based projects go, but it sure is effective,
and reduces coding difficulties. ;)

--Brendan Moian

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