List of valid INTCAP modes:
Mode Input*
2 +INP 0
3 +INP 1
6 -INP 0
7 -INP 1
10 +INP 2
11 +INP 3
14 -INP 2
15 -INP 3
18 +INP 4
19 +INP 5
22 -INP 4
23 -INP 5
26 +INP 6
27 +INP 7
30 -INP 6
31 -INP 7
*NOTE: "+" denotes rising edge of input
"-" denotes falling edge of input