>> Could someone of yours explain me the basic uses and advantadges of the
pullups in a PIC?
>
>sure.for any input you have to have two states LOW and HIGH   0/1 in order
to determine low or high states >you need to have pull up or pull down
resister. that is how you can explain in software what to do IF your input
>is low or high. Example .imagine you have one state what will happen
>
>        btfss    PORTB,0    ; if low turn green led on if high redone on
>        bsf      PROTB,1    ; turn red led on
>        bsf      PORTB,2    ; turn green led on
>
>if you connect your switch without pull up or pull down you will have
unreliable design and it is not going to >work.this is the most basic way I
can explain. let me know if you need more explanation.
>
>Andre Abelian
>
>> thanks in advance.

Lot of thanks Andre, I will reply to the piclist to receive all the possible
info. About the pullups, OK, I understand that, and I use them this way, but
my question was more.. ehm..'pic-oriented'. Maybe the rigth question is:

Can I assume that if I set the portb internal pullups via code, and I drive
any portb pin with a 'below-5v-but-above-2v' signal, the pullup will 'raise'
the signal to 'full-5V', and this will improve my signal adquisition? If
this is correct, I understand PIC pullups. If this is wrong.. I am confused
yet.

Thanks in advance.. again  :)

Keep on PICing

Sebastian