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On Sun, 1 Jan 2012 21:04:24 +0100, G?l Zsolt wrote:
:: I didn't find
:: any option in datasheets about crystall oscillator. I can find only
:: external clock source or internal RC. Am I missed somting?

No, you are not missing anything. This chip has no provision for using=20
crystals or resonators. The choices are internal 16MHz switched oscillator=
=20
or an external clock/oscillator module with TTL clock pulses . Frequency=20
tolerance is quite wide at +/- 10%, and note the decoupling recommended by=
=20
Microchip - 0u1F and 0u01F in parallel as close to the power pins as=20
possible.

Note that this chip has quite low current source/sink capabilities compared=
=20
to the majority of the Pic range and that they are asymetric.

Colin
--
cdb, colin@btech-online.co.uk on 2/01/2012
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