Figure 19. External Interrupt/Event Gpio Mapping - ST STM32F100 Series Reference Manual

Advanced arm-based 32-bit mcus

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1. To configure the AFIO_EXTICRx for the mapping of external interrupt/event lines onto GPIOs, the AFIO

clock should first be enabled. Refer to

(RCC_APB2ENR).

The two other EXTI lines are connected as follows:

EXTI line 16 is connected to the PVD output

EXTI line 17 is connected to the RTC Alarm event

Figure 19. External interrupt/event GPIO mapping

EXTI0[3:0] bits in AFIO_EXTICR1 register

EXTI1[3:0] bits in AFIO_EXTICR1 register

EXTI15[3:0] bits in AFIO_EXTICR4 register

Section 6.3.7: APB2 peripheral clock enable register

RM0041 Rev 6

Interrupts and events

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