Figure 43. External Interrupt/Event Gpio Mapping (Stm32F42Xxx And Stm32F43Xxx) - STMicroelectronics STM32F405 Reference Manual

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Figure 43. External interrupt/event GPIO mapping (STM32F42xxx and STM32F43xxx)

The seven 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 OTG FS Wakeup event
•
EXTI line 19 is connected to the Ethernet Wakeup event
• EXTI line 20 is connected to the USB OTG HS (configured in FS) Wakeup event
•
EXTI line 21 is connected to the RTC Tamper and TimeStamp events
• EXTI line 22 is connected to the RTC Wakeup event
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