piclist 2001\01\21\222546a >
Thread: grounding unused inputs
face BY : Richard Sloan email (remove spam text)

Does not seem to matter if an unused output is fried.

-----Original Message-----
From: pic microcontroller discussion list
[EraseMEPICLISTspamspamBeGoneMITVMA.MIT.EDU]On Behalf Of Olin Lathrop
Sent: Sunday, January 14, 2001 3:19 PM
Subject: Re: [PIC]: grounding unused inputs

> To be "safe", it is best to tie unused input pins to ground [or Vcc,
> doesn't much matter which] *ONLY* through a resistor, rather than
> directly with a short. This is not superstition, as during code
> development it is all too easy to accidentally configure a pin
> intended as input to output. You then run the risk of
> short-circuiting an output.

Perhaps in a low volume product.  I wouldn't want to burden a high volume
product with unnecessary parts for a minor debugging convenience.

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

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