Power control register 3
| EWUP1 | Enable Wakeup pin WKUP1 |
| EWUP2 | Enable Wakeup pin WKUP2 |
| EWUP3 | Enable Wakeup pin WKUP3 |
| EWUP4 | Enable Wakeup pin WKUP4 |
| EWUP5 | Enable Wakeup pin WKUP5 |
| RRS | SRAM2 retention in Standby mode |
| APC | Apply pull-up and pull-down configuration |
| ENULP | Enable ULP sampling of BOR and PVD |
| EIWUL | Enable internal wakeup line |