How to set the voltage of the falling edge of the EXTI?

[leon_titan]

Hi,

I'm using the EXTI event to detect the gpio's falling edge, but the event not triggered well. After using the multimeter i found the valtage is falling from 3.3 to 1.6(not to zero), maybe this is the reason. So how can I set the voltage of the falling edge by code so when the voltage falling to 1.6 there can be a falling event?

Thanks very much!

[Giovanni]

Hi,

STM32 has a voltage monitor, see the PWR unit in the reference manual.

Giovanni

[leon_titan]

ok, i will check that.
btw, i detect the falling edge in stm32's shutdown mode, do the power monitor work?

[leon_titan]

ok, i will check that.
btw, i detect the falling edge in stm32's shutdown mode, do the power monitor work?

to wake up the mcu

[Giovanni]

ok, i will check that.
btw, i detect the falling edge in stm32's shutdown mode, do the power monitor work?

to wake up the mcu

Neved did that so I don't have an answer, you need to read the RM.

Giovanni