Table 98. Interrupt Control Bits - ST STM32F40 Series Reference Manual

Real-time clock (RTC)
To enable the RTC Tamper interrupt, the following sequence is required:
1. Configure and enable the EXTI Line 21 in interrupt mode and select the rising edge
sensitivity.
2. Configure and Enable the TAMP_STAMP IRQ channel in the NVIC.
3. Configure the RTC to detect the RTC tamper event.
To enable the RTC TimeStamp interrupt, the following sequence is required:
1. Configure and enable the EXTI Line 21 in interrupt mode and select the rising edge
sensitivity.
2. Configure and Enable the TAMP_STAMP IRQ channel in the NVIC.
3. Configure the RTC to detect the RTC timestamp event.
Table 98.
Alarm A
Alarm B
Wakeup
TimeStamp
Tamper1 detection
Tamper2 detection
1. Wakeup from STOP and Standby modes is possible only when the RTC clock source is LSE or LSI.
2. If RTC_TAMPER2 pin is present. Refer to device datasheet pinout.
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Interrupt control bits
Interrupt event
(2)
Doc ID 018909 Rev 4
Enable
Event flag control
bit
ALRAF ALRAIE
ALRBF ALRBIE
WUTF WUTIE
TSF TSIE
TAMP1F TAMPIE
TAMP2F TAMPIE
Exit the Exit the
Sleep Stop
mode mode
(1)
yes yes
(1)
yes yes
(1)
yes yes
(1)
yes yes
(1)
yes yes
(1)
yes yes
RM0090
Exit the
Standby
mode
(1)
yes
(1)
yes
(1)
yes
(1)
yes
(1)
yes
(1)
yes