Josh:

I would think that 0.25% accuracy would be fine for serial comms - async
serial is not very demanding. I will be trying some serial comms with my
MicroStick  II in the next day or so. I'll post my results here. Note
that the non-USB versions of the 24F only have a 2% clock accuracy. But
the 24FJ64GB002 that comes with the MicroStick is 0.25%.

You can mount the MicroStick on a prototyping board and then use an
external xtal. If you then build a PCB for the final device, you don't
need the MicroStick. The main reason I wanted the MicroStick was for the
built-in programmer, so I could play with the 16 and 32 bit chips.  If I
want to get serious, then I can always buy a PicKit III or other
programmer.

I'm just a hobbyist these days, so I don't need anything fancy.

--=20
Larry Bradley =20
Orleans (Ottawa) Canada=20

On Tue, 2014-04-15 at 01:54 -0400, Josh Koffman wrote:

> On Mon, Apr 14, 2014 at 11:04 PM, Larry Bradley <larry.bradley@ncf.ca> wr=
ote:
> > Just got one the other day.
> >
> > They use the internal RC oscillator. The 24F chip has a basic 8 mHz
> > clock, rated at 0.25% accuracy, I think. There is an on-board PLL for
> > the USB port that gets you higher clock rates.
>=20
> Hi Larry,
>=20
> Thanks for the quick reply. I'm looking for fairly solid clock
> accuracy (serial comms) so maybe going with the USB 32 bit Whacker is
> a slightly better choice with what looks to be a clock module on
> board.
>=20
> I do like that the Microstick would give me a few chip options to try,
> but I'm concerned that all of them would have to run off of internal
> clocks.
>=20
> Any thoughts?
>=20
> Josh
> --=20
> A common mistake that people make when trying to design something
> completely foolproof is to underestimate the ingenuity of complete
> fools.
>         -Douglas Adams
--=20
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