power control register
| LPDS | Low-power deep sleep |
| PDDS | Power down deepsleep |
| CWUF | Clear wakeup flag |
| CSBF | Clear standby flag |
| PVDE | Power voltage detector enable |
| PLS | PVD level selection |
| DBP | Disable backup domain write protection |
| ULP | Ultra-low-power mode |
| FWU | Fast wakeup |
| VOS | Voltage scaling range selection |
| DS_EE_KOFF | Deep sleep mode with Flash memory kept off |
| LPRUN | Low power run mode |