Figure 21. External Interrupt/Event Gpio Mapping - STMicroelectronics STM32F05 series Reference Manual

Interrupts and events

Figure 21. External interrupt/event GPIO mapping

The remaining lines are connected as follow:
●
EXTI line 16 is connected to the PVD output
● EXTI line 17 is connected to the RTC Alarm event
●
EXTI line 18 is reserved (internally held low)
●
EXTI line 19 is connected to RTC tamper and Timestamps
●
EXTI line 20 is reserved (internally held low)
●
EXTI line 21 is connected to Comparator 1 output
●
EXTI line 22 is connected to Comparator 2 output
●
EXTI line 23 is connected to I2C1 wakeup
●
EXTI line 24 is reserved (internally held low)
●
EXTI line 25 is connected to USART1 wakeup
●
EXTI line 26 is reserved (internally held low)
●
EXTI line 27 is connected to CEC wakeup.
Note: EXTI lines 18, 20, 23, 24, 25, 26 and 27 are internal.
162/742
EXTI0[3:0] bits in the SYSCFG_EXTICR1 register
PA0
PB0
EXTI0
PC0
PD0
PE0
PF0
EXTI1[3:0] bits in the SYSCFG_EXTICR1 register
PA1
PB1
PC1
PD1
PE1
PF1
EXTI15[3:0] bits in the SYSCFG_EXTICR4 register
PA15
PB15
PC15
PD15
PE15
PF15
Doc ID 018940 Rev 1
EXTI1
EXTI15
RM0091
MS19951V1