Wake-up pin on STM32L451VCT6.

[Luis Ber]

Hi community,

I'm doing a PCB design with the microcontroller STM32L451VCT6. I want to work in low power and wake up the microcontroller with a push button. This push button is directly connected to a system wake up pin (PC13).

I want to know how should be the signal of this interruption? Should it be rising or falling edge? Now, the button is connected to GND, then if the pin is pulled up it will generate a falling edge interruption. Can this wake up pin be configured in pull up mode in order to read falling edges interruptions?

Thank you very much,

Luis

[Mohamed Aymen HZAMI]

Hello,

You can check the reference manual RM0394 rev 4 section 5.3.3 (Low Power Modes), you will find details on the configuration of an interruption.

Best Regards,

Mohamed Aymen.