0 half cycles active 0b0000 0000 0000 0000
1 half cycle active  0b0000 0000 0000 0001
2 half cycles active 0b0000 0001 0000 0001
3 half cycles active 0b0000 0001 0001 0001
4 half cycles active 0b0001 0001 0001 0001
5 half cycles active 0b0001 0001 0001 0101
6 half cycled active 0b0001 0101 0001 0101