> Some quick questions about what a PIC '87X actually does vs. what MPLAB
SIM
> says it does...
>
> I understand there is a 2 cycle delay on Timer 0, this is not a question.
> However, there is nothing similar for Timers 1 and 2 listed in the
> documentation.  This would lead me to believe that there is not a 2 cycle
> synch delay on Timers 1 and 2.

Hi Joe:

    I think you missed something about the timers:

    1) The delay you're talking about is necessary for synchronization with
the PIC internal clock, this is only valid for external clocks driving the
timer module ;

    2) Timer 2 cannot be driven by external clocks, so it works only in
internal (syncronized) clock mode;

    3) Timer 0 and Timer 1 can be driven by external clocks, in that case
there will always be a delay between the external clock pulse and the
increment of the timer;

    4) See page 12-4 of DS31012A for more information about TIMER1 in
external synchronized clock mode ...

    Hope it helps ...

    Fabio

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