ST STM32L4+ Series Reference Manual page 1609

RM0432
Functions
RTC_TS
RTC_REFIN
RTC_OUT1
RTC_OUT2
47.5 RTC interrupts
The interrupt channel is set in the masked interrupt status register. The interrupt output is
also activated.
Interrupt
Interrupt event
acronym
Alarm A
Alarm B
RTC Timestamp
Wakeup timer
interrupt
SSR underflow
1. The event flags are in the RTC_SR register.
2. The interrupt masked flags (resulting from event flags AND enable control bits) are in the RTC_MISR register.
3. Wakeup from Stop and Standby modes is possible only when the RTC clock source is LSE or LSI.
4. Wakeup from Shutdown modes is possible only when the RTC clock source is LSE.
47.6 RTC registers
Refer to
register descriptions.
The peripheral registers can be accessed by words (32-bit).
Real-time clock (RTC) applied to STM32L4P5xx and STM32L4Q5xx only
Table 324. RTC pins functionality over modes
Functional in all low-
power modes except
Standby and Shutdown
modes
Table 325. Interrupt requests
Event
(1)
flag control bit
ALRAF
ALRBF
TSF
WUTF
SSRUF
Section 1.2 on page 84
Functional in Standby
and Shutdown mode
Yes
Yes
Yes
Yes
Interrupt
Enable
clear
(2)
method
write 1 in
ALRAIE
CALRAF
write 1 in
ALRBIE
CALRBF
write 1 in
TSIE
CTSF
write 1 in
WUTIE
CWUTF
write 1 in
SSRUIE
CSSRUF
of the reference manual for a list of abbreviations used in
RM0432 Rev 6
Functional in V
Yes
No
Yes
No
Exit from
Exit from
Stop and
Sleep
Standby
mode
mode
(3)
Yes Yes
(3)
Yes Yes
(3)
Yes Yes
(3)
Yes Yes
(3)
Yes Yes
BAT
mode
Yes
No
Yes
No
Exit from
Shutdown
mode
(4)
Yes
(4)
Yes
(4)
Yes
(4)
Yes
(4)
Yes
1609/2301
1647