>>>> Is it possible to drive 2 or 3 PIC's with only one crystal in HS+PLL
>>>> mode to operate them on the same frequency.. If so.. how may one do
>>>> this?.

>> For stability, you can either use a buffer, or, better yet, use a
>> separate crystal oscillator and drive all PICs from the same source

> yes I was thingking about that but I need to run the PIC18 at 40MHZ
> using a 10MHZcrystal times 4PLL in the data sheet you do that in
> HS+PLL mode..

Use an external 10MHz oscillator, either crystal plus amp or canned,
as input to all of the PICs and select HS+PLL mode.  I think each PIC
will increase the clock signal by 4X internally, even when using an
external clock signal.


> can the PIC be run in EC mode using a 40MHZ crystal directly instead..

I don't believe so.

						Lee Jones

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