At 02:19 PM 10/28/2011, Electron wrote:

>Hi,
>
>on a PIC24FV, using external oscillator, if I make the whole chip sleep,
>and I enable an CNxx INT, will the chip wake up after just one cycle?
>
>The datasheet seems to concentrate on what happens if you use a crystal
>(of course it will take ages to wake up), but what if I use an external
>oscillator?
>
>Will it wake up "instantly"?

I don't use that PIC, but I don't think that it wakes up=20
instantly.  If you take a look at the oscillator block diagram, you=20
will probably see a 1024 cycle delay that is enforced anytime you=20
select any of the crystal oscillator options.  And, as far as I know,=20
you have to select one of the crystal options if you want to feed an=20
external clock source into the PIC.

I *could* be wrong, though.  A quick look through the datasheet=20
should make things clear.

dwayne

--=20
Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax
www.trinity-electronics.com
Custom Electronics Design and Manufacturing

--=20
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