Interrupt and Status Register
| CC1IF | Compare 1 interrupt flag  |  
| ARRM | Autoreload match  |  
| EXTTRIG | External trigger edge event  |  
| CMP1OK | Compare register 1 update OK  |  
| ARROK | Autoreload register update OK  |  
| UP | Counter direction change down to up  |  
| DOWN | Counter direction change up to down  |  
| UE | LPTIM update event occurred  |  
| REPOK | Repetition register update Ok  |  
| DIEROK | Interrupt enable register update OK  |