CSR
| LSION | LSI oscillator enable |
| LSIRDY | LSI oscillator ready |
| MSISRANGE | SI range after Standby mode |
| RMVF | Remove reset flag |
| FWRSTF | Firewall reset flag |
| OBLRSTF | Option byte loader reset flag |
| PINRSTF | Pin reset flag |
| BORRSTF | BOR flag |
| SFTRSTF | Software reset flag |
| IWDGRSTF | Independent window watchdog reset flag |
| WWDGRSTF | Window watchdog reset flag |
| LPWRSTF | Low-power reset flag |