ST STM32L4x6 Reference Manual page 328

Extended interrupts and events controller (EXTI)
1. All the lines can wake up from the Stop 0 and Stop 1 modes. All the lines, except the ones
mentioned above, can wake up from the Stop 2 mode.
2. This line source cannot wake up from the Stop 2 mode.
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Table 43. EXTI lines connections (continued)
EXTI line
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
DocID024597 Rev 3
(1)
Line source
(2)
I2C2 wakeup
I2C3 wakeup
(2)
USART1 wakeup
(2)
USART2 wakeup
(2)
USART3 wakeup
(2)
UART4 wakeup
(2)
UART5 wakeup
LPUART1 wakeup
LPTIM1
(2)
LPTIM2
(2)
SWPMI1 wakeup
PVM1 wakeup
PVM2 wakeup
PVM3 wakeup
PVM4 wakeup
LCD wakeup
RM0351
Line type
direct
direct
direct
direct
direct
direct
direct
direct
direct
direct
direct
configurable
configurable
configurable
configurable
direct