bit 0
low
high
float
pullup
bit 1
low
high
float
pullup
bit 2
low
high
float
pullup
bit 3
low
high
float
pullup
bit 4
low
high
float
pullup
bit 5
low
high
float
pullup
bit 6
low
high
float
pullup
bit 7
low
high
float
pullup