Peter Johansson wrote 2012-09-24 20:04:
> On Sun, Sep 23, 2012 at 6:44 PM, William "Chops" Westfield
> <westfw@mac.com> wrote:
>
>> Fifteen new PICs with crystal-free USB operation.  Includes 16F varietie=
s down to 14 pins, 18F "replacements" for the venerable 4550 and 2550, and =
larger 18F varieties.
>
> One blurb I read mentions that these chips only obtain 0.25% accuracy
> when actively connected to USB.  Does this mean they are synchronizing
> to the timebase in the USB host?
>

They sync/lock INTOSC to the USB signal.


> -p.
>
--=20
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