Several Wakeup Pins

[Iman Hosseinzadeh]

Hi All,

Is it possible to define wakeup pins other than WKUP0 and WKUP1 in STM32L152RC? I need to define three or more wakeup sources.

Thanks in advance.

[Imen.D]

Hello @Iman Hosseinzadeh​ ,

There are three WKUP pins (WUKP1, WKUP2 or WKUP3).

Please refer to the STM32L15xRC datasheet for more information.

With Regards,

Imen

[Tesla DeLorean]

For a broader ranges of sources consider using external circuity to combine them

[Iman Hosseinzadeh]

@Imen DAHMEN​ Thanks! I think the R series don't have the third wakeup.

@Community member​ Thanks. I added an OR circuit two combine two sources. When the MCU wakes up, is it possible to detect the source of wake up?

[T J]

do you pull to ground to wake up ?

you can use multiple diodes from many sources to pull that pin down...

use 4 diodes as a 4input OR gate