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PICList Thread
'PIC 16F84A'
1999\10\01@110620 by Dwornik, Sebastian

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


Sebastian

1999\10\01@120532 by Lawrence Lile

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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 removed}

1999\10\03@192956 by Tony Nixon

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

I wouldn't automatically assume that it will interface directly with
your hardware, problem free. The DIE may have different characteristics,
more susceptible to noise etc.

--
Best regards

Tony

http://www.picnpoke.com
Email spam_OUTsalesTakeThisOuTspampicnpoke.com


'pic 16f84a'
2007\08\14@204552 by orlando condor minaya
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ayuda con hexa para  visualizador matriz de puntos  con leds
te estare muy agradecido
> Date: Tue, 14 Aug 2007 20:31:09 -0400> From: .....peteKILLspamspam@spam@petertodd.ca> To: piclistspamKILLspammit.edu> Subject: Re: [PIC] : Fuzzy Logic on PIC16F877A> > -----BEGIN PGP SIGNED MESSAGE-----> Hash: SHA1> > On Tue, Aug 14, 2007 at 05:47:17PM -0500, Mark Rages wrote:> > > Fuzzy logic has melted into part of the mainstream. This is a> > > very effective technique to deal with non linear systems. It is> > > well suited to control a system whose load and dynamics are> > > widely changing. A airplane burning off fuel for example.> > > > A traditional control system works better than fuzzy when the system> > can be accurately modeled.> > > > If a system cannot be modeled easily, a fuzzy controller is better> > than nothing, and often better than a traditional controller based on> > an inaccurate model.> > Can fuzzy controllers perform better in situations where the specifics> of what they are controlling is changing? I read the below article, and> it mentions a ball balancing on a beam, what if the b!
eam were floppy? Or> if the beams modulus (right term?) was changing?> > > Bob Pease has a good description of the hype around fuzzy logic> > controllers (I was going through engineering school at the time and I> > remember a LOT of hype):> > > > http://www.national.com/rap/Application/0,1570,25,00.html> > - -- > http://petertodd.org> -----BEGIN PGP SIGNATURE-----> Version: GnuPG v1.4.6 (GNU/Linux)> > iD4DBQFGwklN3bMhDbI9xWQRAgLcAJYlWdlKhIxvt8rcAlwuzhvMzkt+AKCINx4q> g2sg81/FsNSDxJYmA2Zhcw==> =aPd2> -----END PGP SIGNATURE----->

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