Table 202. Interrupt Requests - STMicroelectronics STM32WLEx Reference Manual

Real-time clock (RTC)
30.5 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.
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Table 202. Interrupt requests

Event Enable
(1)
flag control bit
ALRAF ALRAIE
ALRBF ALRBIE
TSF TSIE
WUTF WUTIE
SSRUF SSRUIE
RM0461 Rev 5
Interrupt Exit from
clear Sleep
(2)
method mode
write 1 in
Yes
CALRAF
write 1 in
Yes
CALRBF
write 1 in
Yes
CTSF
write 1 in
Yes
CWUTF
write 1 in
Yes
CSSRUF
RM0461
Exit from
Exit from
Stop and
Shutdown
Standby
mode
mode
(3) (4)
Yes Yes
(3) (4)
Yes Yes
(3) (4)
Yes Yes
(3) (4)
Yes Yes
(3) (4)
Yes Yes