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STM32F3 pin external interrupt and Alternate Function mode

Question asked by gadeyne.thibault on Dec 12, 2017
Latest reply on Dec 14, 2017 by gadeyne.thibault



I am using a STM32F334.

Is it possible to configure a pin in Alternate Function Mode (Timer input Channel for my project) and to use at the same time the pin as an external interrupt source ?


It seems to work properly in my project but I am surprised it does and could not find any information on this case in the Reference Manual. Is it unrecommended to do it ?

According to Reference Manual, external interrupts are handled through EXTI and SYSCFG_EXTICRx registers while mode of GPIO pin is handled through GPIOx_MODER registers which are not related.


Thank you,