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'[PIC]: Which is better?'
2000\08\07@181306 by ?=

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   Hi Everyone,

   Do you know wich is better, configured unused pins as outputs and left
them with no conecction, or configure them as inputs with a fix voltage (5
or 0)... better in all senses, consuption, noise, etc...

   Thanks in advance,

   Gonzalo

P.S. sorry for my bad English :)

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2000\08\08@114949 by Olin Lathrop

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>     Do you know wich is better, configured unused pins as outputs and left
> them with no conecction, or configure them as inputs with a fix voltage (5
> or 0)... better in all senses, consuption, noise, etc...

I prefer to leave them unconnected, set them as outputs and drive them low.
A CMOS output at a steady state with nothing connected draws essentially no
current, so this is even fine for low power applications.  Because the pins
are unconnected, it leaves the option of making last minute manual board
modifications more easily to fix a bug, add something, or whatever.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, spam_OUTolinTakeThisOuTspamcognivis.com, http://www.cognivis.com

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2000\08\08@180446 by jamesnewton

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www.piclist.com/../logic/xtrapins
or
http://www.piclist.com/techref/default.asp?url=logic/xtrapins

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