Read up closer on how to do a timer interrupt, use a small ISR to generate
your signal, and anything not related to that signal can be done in the main
program.  I don't think that'll add glitching if done properly.  I'm not
seeing anything in your post that would suggest that this isn't possible.  I
don't think you really need a second crystal unless the prescale & postscale
won't get you your target frequency with the present crystal, and there
might be ways around that too.  You shouldn't need a second PIC for that.

Jeff

----- Original Message -----
From: Andre Abelian <engelec@EARTHLINK.NET>

> I need to drive 4 outputs the sequence I do not yet
> but I know the speed is 60 hz continuously none stop unless there is some
> thing
> wrong with it and at the same time
> I have to do AD conversion and some other basic functions
> bit test and bla bla. I am thinking to use timer1 with second
> crystal just to do the 60hz pulsing but then I am king of afraid of
> adding glitches or other unknown problems in 60hz loop or maybe easier way
> to do it by using 2 pics or so. my question is which method should I use?
> can single pic can do this how should I setup? any help will
> highly appreciated.

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