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 | Wake-up timer flag This flag is set by hardware when the wake-up auto-reload counter reaches 0. If WUTOCLR[15:0] is different from 0x0000, WUTF is cleared by hardware when the wake-up auto-reload counter reaches WUTOCLR value. If WUTOCLR[15:0] is 0x0000, WUTF must be cleared by software. 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. Note: TSF is not set if TAMPTS1=11 and the tamper flag is read during the 3 ck_apre cycles following tamper event. Refer to Timestamp on tamper event for more details. |
| 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. |
| SSRUF | SSR underflow flag This flag is set by hardware when the SSR rolls under 0. SSRUF is not set when SSCLR=1. |