Rtc; Table 16. Rtc Differences Between Stm32L1 Series And Stm32L4 Series - ST STM32L1 Series Application Note

AN4612
4.7

RTC

The STM32L4 and STM32L1 Series implement almost the same feature on the RTC.

Table 16. RTC differences between STM32L1 Series and STM32L4 Series

RTC
Coarse digital calibration (kept for compatibility
only. New developments should only use
smooth calibration).
Features
Configuration
Color key:
= Same feature, but specification change or enhancement
= Feature not available (NA)
For more information about STM32L4 Series RTC features, please refer to RTC section of
STM32L4 Series reference manuals.
STM32L1 Series
1 tamper pin (available in VBAT)
80 bytes backup registers
-
DocID027094 Rev 3
Peripheral migration
STM32L4 Series
Only smooth calibration available.
3 tamper pin (available in VBAT
128 bytes backup registers
– RTC_CR/DCE not available
– RTC_CALIB register not available
– RTC_TAFCR (L1) -> RTC_TAMPCR (L4)
Except bit ALARMOUTTYPE available on
RTC_OR/RTC_ALARM_TYPE
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