ALRBFCLR=B_0x0, ALRAFCLR=B_0x0, SSRUIE=B_0x0, TSE=B_0x0, BYPSHAD=B_0x0, TAMPTS=B_0x0, OSEL=B_0x0, SUB1H=B_0x0, TSEDGE=B_0x0, FMT=B_0x0, WUTIE=B_0x0, ALRAIE=B_0x0, COSEL=B_0x0, ALRAE=B_0x0, TSIE=B_0x0, ITSE=B_0x0, ALRBE=B_0x0, TAMPALRM_TYPE=B_0x0, COE=B_0x0, WUCKSEL=B_0x0, TAMPALRM_PU=B_0x0, REFCKON=B_0x0, ALRBIE=B_0x0, TAMPOE=B_0x0, POL=B_0x0, ADD1H=B_0x0, WUTE=B_0x0
RTC control register
| WUCKSEL | ck_wut wake-up clock selection 0 (B_0x0): RTC/16 clock is selected 1 (B_0x1): RTC/8 clock is selected 2 (B_0x2): RTC/4 clock is selected 3 (B_0x3): RTC/2 clock is selected |
| TSEDGE | Timestamp event active edge 0 (B_0x0): RTC_TS input rising edge generates a timestamp event 1 (B_0x1): RTC_TS input falling edge generates a timestamp event |
| REFCKON | RTC_REFIN reference clock detection enable (50 or 60 Hz) 0 (B_0x0): RTC_REFIN detection disabled 1 (B_0x1): RTC_REFIN detection enabled |
| BYPSHAD | Bypass the shadow registers 0 (B_0x0): Calendar values (when reading from RTC_SSR, RTC_TR, and RTC_DR) are taken from the shadow registers, which are updated once every two RTCCLK cycles. 1 (B_0x1): Calendar values (when reading from RTC_SSR, RTC_TR, and RTC_DR) are taken directly from the calendar counters. |
| FMT | Hour format 0 (B_0x0): 24 hour/day format 1 (B_0x1): AM/PM hour format |
| SSRUIE | SSR underflow interrupt enable 0 (B_0x0): SSR underflow interrupt disabled 1 (B_0x1): SSR underflow interrupt enabled |
| ALRAE | Alarm A enable 0 (B_0x0): Alarm A disabled 1 (B_0x1): Alarm A enabled |
| ALRBE | Alarm B enable 0 (B_0x0): Alarm B disabled 1 (B_0x1): Alarm B enabled |
| WUTE | Wake-up timer enable 0 (B_0x0): Wake-up timer disabled 1 (B_0x1): Wake-up timer enabled |
| TSE | timestamp enable 0 (B_0x0): timestamp disable 1 (B_0x1): timestamp enable |
| ALRAIE | Alarm A interrupt enable 0 (B_0x0): Alarm A interrupt disabled 1 (B_0x1): Alarm A interrupt enabled |
| ALRBIE | Alarm B interrupt enable 0 (B_0x0): Alarm B interrupt disable 1 (B_0x1): Alarm B interrupt enable |
| WUTIE | Wake-up timer interrupt enable 0 (B_0x0): Wake-up timer interrupt disabled 1 (B_0x1): Wake-up timer interrupt enabled |
| TSIE | Timestamp interrupt enable 0 (B_0x0): Timestamp interrupt disable 1 (B_0x1): Timestamp interrupt enable |
| ADD1H | Add 1 hour (summer time change) 0 (B_0x0): No effect 1 (B_0x1): Adds 1 hour to the current time. |
| SUB1H | Subtract 1 hour (winter time change) 0 (B_0x0): No effect 1 (B_0x1): Subtracts 1 hour to the current time. |
| BKP | Backup |
| COSEL | Calibration output selection 0 (B_0x0): Calibration output is 512 Hz 1 (B_0x1): Calibration output is 1 Hz |
| POL | Output polarity 0 (B_0x0): The pin is high when ALRAF/ALRBF/WUTF is asserted (depending on OSEL[1:0]), or when a TAMPxF/ITAMPxF is asserted (if TAMPOE = 1). 1 (B_0x1): The pin is low when ALRAF/ALRBF/WUTF is asserted (depending on OSEL[1:0]), or when a TAMPxF/ITAMPxF is asserted (if TAMPOE = 1). |
| OSEL | Output selection 0 (B_0x0): Output disabled 1 (B_0x1): Alarm A output enabled 2 (B_0x2): Alarm B output enabled 3 (B_0x3): Wake-up output enabled |
| COE | Calibration output enable 0 (B_0x0): Calibration output disabled 1 (B_0x1): Calibration output enabled |
| ITSE | timestamp on internal event enable 0 (B_0x0): internal event timestamp disabled 1 (B_0x1): internal event timestamp enabled |
| TAMPTS | Activate timestamp on tamper detection event 0 (B_0x0): Tamper detection event does not cause a RTC timestamp to be saved 1 (B_0x1): Save RTC timestamp on tamper detection event |
| TAMPOE | Tamper detection output enable on TAMPALRM 0 (B_0x0): The tamper flag is not routed on TAMPALRM 1 (B_0x1): The tamper flag is routed on TAMPALRM, combined with the signal provided by OSEL and with the polarity provided by POL. |
| ALRAFCLR | Alarm A flag automatic clear 0 (B_0x0): Alarm A event generates a trigger event and ALRAF must be cleared by software to allow next alarm event. 1 (B_0x1): Alarm A event generates a trigger event. |
| ALRBFCLR | Alarm B flag automatic clear 0 (B_0x0): Alarm B event generates a trigger event and ALRBF must be cleared by software to allow next alarm event. 1 (B_0x1): Alarm B event generates a trigger event. |
| TAMPALRM_PU | TAMPALRM pull-up enable 0 (B_0x0): No pull-up is applied on TAMPALRM output 1 (B_0x1): A pull-up is applied on TAMPALRM output |
| TAMPALRM_TYPE | TAMPALRM output type 0 (B_0x0): TAMPALRM is push-pull output 1 (B_0x1): TAMPALRM is open-drain output |
| OUT2EN | RTC_OUT2 output enable |