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unused ports

 
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jelodavid



Joined: 03 Apr 2005
Posts: 22
Location: Laguna Philippines

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unused ports
PostPosted: Thu Jun 09, 2005 1:44 am     Reply with quote
hello everybody.! Any suggestion for unused ports? Shall i remain it floating or do i have to connect it to gnd?
ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

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PostPosted: Thu Jun 09, 2005 2:10 am     Reply with quote
Please try the Search function of this forum before posting.
Using the keywords 'unused ports' I found the following thread http://www.ccsinfo.com/forum/viewtopic.php?t=3861&highlight=unused+ports
valemike
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PostPosted: Thu Jun 09, 2005 6:29 am     Reply with quote
The cheapest and most convenient way is to leave unused pins dangling, and you have to drive them as outputs. Doesn't matter if you put a '0' or 1' on each bit independently. That's what i always do.

The Microchip FAE answered this question to me once and said i had a choice of doing the above or terminating each pin with a pullup resistor or pulldown resistor and configuring the TRIS pins as inputs.

So youve got your choice.
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