Hi Dwayne,
I'm talking about external oscillator, it doesn't have anything to do with
the Xtal. I know that using a Xtal it takes a thousands cycles to restart:
that's exactly what I want to avoid, using the external oscillator. I can
test it myself but it will take some days (4-6) before I get it, I will
order it anyway, but if anybody has ever got his PIC24 (or dsPIC or even
PIC I think they're all the same in this regard) out of sleep while using
an external oscillator (not a Xtal), I'd like to hear his/her experiences.

With kind regards,
Mario


At 23.41 2011.10.28, you wrote:
>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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