Pull-up Enable Register
| P0 | Pull Up Enable. |
| P1 | Pull Up Enable. |
| P2 | Pull Up Enable. |
| P3 | Pull Up Enable. |
| P4 | Pull Up Enable. |
| P5 | Pull Up Enable. |
| P6 | Pull Up Enable. |
| P7 | Pull Up Enable. |
| P8 | Pull Up Enable. |
| P9 | Pull Up Enable. |
| P10 | Pull Up Enable. |
| P11 | Pull Up Enable. |
| P12 | Pull Up Enable. |
| P13 | Pull Up Enable. |
| P14 | Pull Up Enable. |
| P15 | Pull Up Enable. |
| P16 | Pull Up Enable. |
| P17 | Pull Up Enable. |
| P18 | Pull Up Enable. |
| P19 | Pull Up Enable. |
| P20 | Pull Up Enable. |
| P21 | Pull Up Enable. |
| P22 | Pull Up Enable. |
| P23 | Pull Up Enable. |
| P24 | Pull Up Enable. |
| P25 | Pull Up Enable. |
| P26 | Pull Up Enable. |
| P27 | Pull Up Enable. |
| P28 | Pull Up Enable. |
| P29 | Pull Up Enable. |
| P30 | Pull Up Enable. |
| P31 | Pull Up Enable. |