External Interrupt/Event Line Mapping; Exti Register Description; Figure 16. External Interrupt/Event Gpio Mapping - ST STM32F101 Series Reference Manual

Advanced arm-based 32-bit mcus

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External interrupt/event line mapping

The 80 GPIOs are connected to the 16 external interrupt/event lines in the following manner:

The three 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

EXTI line 18 is connected to the USB Wakeup event

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 1.1 on page 23

for a list of abbreviations used in register descriptions.

Interrupts and events

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