Falling Edge/Low Level Select Register
| P0 | Falling Edge/Low Level Interrupt Selection. |
| P1 | Falling Edge/Low Level Interrupt Selection. |
| P2 | Falling Edge/Low Level Interrupt Selection. |
| P3 | Falling Edge/Low Level Interrupt Selection. |
| P4 | Falling Edge/Low Level Interrupt Selection. |
| P5 | Falling Edge/Low Level Interrupt Selection. |
| P6 | Falling Edge/Low Level Interrupt Selection. |
| P7 | Falling Edge/Low Level Interrupt Selection. |
| P8 | Falling Edge/Low Level Interrupt Selection. |
| P9 | Falling Edge/Low Level Interrupt Selection. |
| P10 | Falling Edge/Low Level Interrupt Selection. |
| P11 | Falling Edge/Low Level Interrupt Selection. |
| P12 | Falling Edge/Low Level Interrupt Selection. |
| P13 | Falling Edge/Low Level Interrupt Selection. |
| P14 | Falling Edge/Low Level Interrupt Selection. |
| P15 | Falling Edge/Low Level Interrupt Selection. |
| P16 | Falling Edge/Low Level Interrupt Selection. |
| P17 | Falling Edge/Low Level Interrupt Selection. |
| P18 | Falling Edge/Low Level Interrupt Selection. |
| P19 | Falling Edge/Low Level Interrupt Selection. |
| P20 | Falling Edge/Low Level Interrupt Selection. |
| P21 | Falling Edge/Low Level Interrupt Selection. |
| P22 | Falling Edge/Low Level Interrupt Selection. |
| P23 | Falling Edge/Low Level Interrupt Selection. |
| P24 | Falling Edge/Low Level Interrupt Selection. |
| P25 | Falling Edge/Low Level Interrupt Selection. |
| P26 | Falling Edge/Low Level Interrupt Selection. |
| P27 | Falling Edge/Low Level Interrupt Selection. |
| P28 | Falling Edge/Low Level Interrupt Selection. |
| P29 | Falling Edge/Low Level Interrupt Selection. |
| P30 | Falling Edge/Low Level Interrupt Selection. |
| P31 | Falling Edge/Low Level Interrupt Selection. |