pad pull control register 1
| PA16_PULL | PA16 pull control register |
| PA17_PULL | PA17 pull control register |
| PA18_PULL | PA18 pull control register |
| PA19_PULL | PA19 pull control register |
| PA20_PULL | PA20 pull control register |
| PA21_PULL | PA21 pull control register |
| PA22_PULL | PA22 pull control register |
| PA23_PULL | PA23 pull control register |
| PA24_PULL | PA24 pull control register |
| PA25_PULL | PA25 pull control register |
| PA26_PULL | PA26 pull control register |
| PA27_PULL | PA27 pull control register |
| PA28_PULL | PA28 pull control register |
| PA29_PULL | PA29 pull control register |
| PA30_PULL | PA30 pull control register |
| PA31_PULL | PA31 pull control register |