Sorry... i'd already did it... but i'll no longer do that.
Maybe it's good enough IF and ONLY IF the unit it always running AND/OR your pcb is located in a shielded metal enclosure. Got too much bad experiment by leaving pin floating in the air AND assign them to output. Even with the best PCB design and ground plane, it gave me odd results in car application where noise is a major problem. Metal enclosure will probably be better... in fact it should.
What you can do if you plan to use the extra I/O one day or another, is to use those 0 OHMS resistors as jumper. You need an i/o, you remove a 0 Ohm resistor... not much. Sure you can use other value if it's a battery powered system or if yu want to reduce the total curent consumption... a little bit depending the PIC you use and all the pah plah plah that comes with.
Same thing with internal pull-ups... i never use them on a final product, can't trust them enough for that. They're good enough for me for experimenting when i'm too lazy to place few resistor.
just another point of view.
WARNING: I don't want to start any wave and flame of any sort!
Last edited by mister_e; - 5th April 2006 at 23:59.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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