ST STM32F31xx

Real-time clock (RTC)
UM1581
398/584
DocID023800 Rev 1
 #define: RTC_OutputPolarity_Low ((uint32_t)0x00100000)
RTC_Output_selection_Definitions
 #define: RTC_Output_Disable ((uint32_t)0x00000000)
 #define: RTC_Output_AlarmA ((uint32_t)0x00200000)
 #define: RTC_Output_AlarmB ((uint32_t)0x00400000)
 #define: RTC_Output_WakeUp ((uint32_t)0x00600000)
RTC_Output_Type_ALARM_OUT
 #define: RTC_OutputType_OpenDrain ((uint32_t)0x00000000)
 #define: RTC_OutputType_PushPull ((uint32_t)0x00040000)
RTC_Smooth_calib_period_Definitions
 #define: RTC_SmoothCalibPeriod_32sec ((uint32_t)0x00000000)
if RTCCLK = 32768 Hz, Smooth calibation period is 32s, else 2exp20 RTCCLK seconds
 #define: RTC_SmoothCalibPeriod_16sec ((uint32_t)0x00002000)
if RTCCLK = 32768 Hz, Smooth calibation period is 16s, else 2exp19 RTCCLK seconds
 #define: RTC_SmoothCalibPeriod_8sec ((uint32_t)0x00004000)
if RTCCLK = 32768 Hz, Smooth calibation period is 8s, else 2exp18 RTCCLK seconds
RTC_Smooth_calib_Plus_pulses_Definitions
 #define: RTC_SmoothCalibPlusPulses_Set ((uint32_t)0x00008000)
The number of RTCCLK pulses added during a X -second window = Y - CALM[8:0]. with Y
= 512, 256, 128 when X = 32, 16, 8