Interrupt and Status Register (intput mode)
| CC1IF | Compare 1 interrupt flag |
| ARRM | Autoreload match |
| EXTTRIG | External trigger edge event |
| 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 |
| CC2IF | Capture 2 interrupt flag |
| CC1OF | Capture 1 over-capture flag |
| CC2OF | Capture 2 over-capture flag |
| DIEROK | Interrupt enable register update OK |