Dwornik,

I've cranked up the osc on other parts before with no other circuit changes,
without any big problems.  It should be (ahem) plug-and-play - new chip, new
crystal, viola'.  I've done this a lot with UV eraseable parts with good
luck.

Some caveats +ADw-G+AD4- :

Plug-and-play +AD0APQ- plug-and-pray +AD0APQ- your mileage may vary +AD0APQ- obj
ects in mirror
may be wierder than they appear +AD0APQ- Murphy works here, in fact he started
this company +AD0APQ- If anything can go wrong, it will, only when you are
demonstrating the prototype to your boss.







-----Original Message-----
From: Dwornik, Sebastian +ADw-SDwornik+AEA-CRSROBOTICS.COM+AD4-
To: PICLIST+AEA-MITVMA.MIT.EDU +ADw-PICLIST+AEA-MITVMA.MIT.EDU+AD4-
Date: Friday, October 01, 1999 10:07 AM
Subject: PIC 16F84A


+AD4-Has anyone begun to play with this 20 Mhz version of the popular '84
+AD4-series?
+AD4-Other then it being five times faster then the 4 Mhz version, is there
+AD4-any major difference or improvement in operation? After looking
+AD4-at the spec. sheet, my assumption seems that an electronic design using
+AD4-the 4 Mhz PIC can be easily swapped with its 20 Mhz version and the
+AD4-electronics (apart from the crystal) can remain the same. Please correct
+AD4-me if I'm wrong on this assumption. Obviously the code will change as
+AD4-well to conform with any special timing sequences.
+AD4-
+AD4-
+AD4-Sebastian