piclist 2001\01\14\090241a >
Thread: grounding unused inputs
face BY : mike@whitewing.co.uk

On Sun, 14 Jan 2001 05:46:58 MST, you wrote:

>Do unused inputs really need to be connected to ground?
>What is the effect if they are not grounded?
>Does it affect operation of the PIC?
>Thank you very much.
>Get free email and a permanent address at http://www.netaddress.com/?N=1
Unused pins should be connected to either 0V or Vdd, or set as
outputs. For PORT B you could also enable pull-ups as an alternative
if this doen't cause problems with other pin usage. If left unconnected,  they may float to intermediate voltages and
cause increased (and erratic) power consumption and  noise.
For a breadboard lash-up it usually doesn't really matter, but any
production circuit should avoid floating inputs.

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<udc36t48cfsalvuelvk3ib6p3co7dl47kh@4ax.com> quoted-printable

In reply to: <20010114124658.14334.qmail@nwcst286.netaddress.usa.net>
See also: www.piclist.com/techref/microchip/ios.htm?key=input
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