power control/status register
| WUF | Wakeup flag  |  
| SBF | Standby flag  |  
| VREFINTRDYF | Internal voltage reference (VREFINT) ready flag This bit indicates the state of the internal voltage reference, VREFINT.  |  
| VOSF | Voltage Scaling select flag  |  
| REGLPF | Regulator LP flag  |  
| EWUP1 | Enable WKUP pin 1  |  
| EWUP2 | Enable WKUP pin 2  |  
| EWUP3 | Enable WKUP pin 3  |