RTC status register
| ALRAF | Alarm A flag This flag is set by hardware when the time/date registers (RTC_TR and RTC_DR) match the alarm A register (RTC_ALRMAR). |
| ALRBF | Alarm B flag This flag is set by hardware when the time/date registers (RTC_TR and RTC_DR) match the alarm B register (RTC_ALRMBR). |
| WUTF | Wakeup timer flag This flag is set by hardware when the wakeup auto-reload counter reaches 0. This flag must be cleared by software at least 1.5 RTCCLK periods before WUTF is set to 1 again. |
| TSF | Timestamp flag This flag is set by hardware when a timestamp event occurs. If ITSF flag is set, TSF must be cleared together with ITSF. |
| TSOVF | Timestamp overflow flag This flag is set by hardware when a timestamp event occurs while TSF is already set. It is recommended to check and then clear TSOVF only after clearing the TSF bit. Otherwise, an overflow might not be noticed if a timestamp event occurs immediately before the TSF bit is cleared. |
| ITSF | Internal timestamp flag This flag is set by hardware when a timestamp on the internal event occurs. |