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unused switch pins

Posted: Wed Dec 09, 2015 1:07 pm
by tjm215
is there a best practice when it comes to unused switch pins? should I tie them to ground via 10k resistor or to 3.3v? or does it make no difference (other than the program number)

Posted: Wed Dec 09, 2015 8:24 pm
by frank
All switch pins must be used to select a program so they all must be tied high or low accordingly.

Posted: Wed Dec 09, 2015 9:39 pm
by tjm215
so if i tied all to ground would that select program 0?

Posted: Thu Dec 10, 2015 4:27 am
by ice-nine
tjm215 wrote:so if i tied all to ground would that select program 0?
Yes, S0-2 tied to ground will select program 0,

s0 = lsb

000 = 0
001 = 1
010 = 2
011 = 3
100 = 4

etc