So i've been looking into SD cards and I've seen most objects say that pullups are needed on 6 of the pins. However, I've read on the forums that these pullups aren't really needed and the objects work any ways. I was wondering which idea is true, and if pullups are not required what do I do to the non connected pins (the 4 not connected to the propeller)? Can they be allowed to float?
I'm asking this because I've tried two different setups and it seems like the pullups are required, yet some say the are not and I'm not sure why.