Extended interrupt and event controller (EXTI) RM0444
322/1390 RM0444 Rev 5
Figure 29. EXTI GPIO mux
The EXTIs mux outputs are available as output signals from the EXTI, to trigger other
functional blocks. The EXTI mux outputs are available independently of mask setting
through the EXTI_IMR and EXTI_EMR registers.
The EXTI lines (event inputs) are connected as shown in the following table.
Table 62. EXTI line connections
EXTI line Line source Line type
0-15 GPIO Configurable
16 PVD output Configurable
17 COMP1 output Configurable
18 COMP2 output Configurable
19 RTC Direct
20 COMP3 output Configurable
21 TAMP Direct
22 I2C2 wakeup Direct
23 I2C1 wakeup Direct
24 USART3 wakeup Direct
25 USART1 wakeup Direct
26 USART2 wakeup Direct
27 CEC wakeup Direct
28 LPUART1 wakeup Direct
29 LPTIM1 Direct
30 LPTIM2 Direct
31 LSE_CSS Direct
32 UCPD1 wakeup Direct
33 UCPD2 wakeup Direct
PA0
PB0
PC0
Px0
EXTI0
EXTI_EXTICR1.EXTI0
PA1
PB1
PC1
Px1
EXTI1
EXTI_EXTICR1.EXTI1
PA15
PB15
PC15
Px15
EXTI15
EXTI_EXTICR4.EXTI15
MS44726V1
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