power control/status register
| WUF | Wakeup flag |
| SBF | Standby flag |
| PVDO | PVD output |
| VREFINTRDY | VREFINT reference voltage ready |
| EWUP1 | Enable WKUP pin 1 |
| EWUP2 | Enable WKUP pin 2 |
| EWUP3 | Enable WKUP pin 3 |
| EWUP4 | Enable WKUP pin 4 |
| EWUP5 | Enable WKUP pin 5 |
| EWUP6 | Enable WKUP pin 6 |
| EWUP7 | Enable WKUP pin 7 |
| EWUP8 | Enable WKUP pin 8 |