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saikumar31
Associate
November 11, 2024
Solved

Is is possible to wakeup the STM32L496 with an external interrupt in standby mode

  • November 11, 2024
  • 1 reply
  • 1427 views

Hello,

currently I'm using stm32l496 in that i want to wake up the controller from the standby mode on an external interrupt.

i configured pin PC13 (supports wake up functionality) as an external interrupt with rising edge , now when the MCU enters into the standby mode, upon receiving external interrupt will the device wakeup?

Best answer by Andrew Neil

The available wakeup sources are stated in the datasheet - they do not include  EXTI.

If EXTI were available as a wakeup source, that would be stated in the datasheet.

1 reply

STTwo-32
STTwo-32
Technical Moderator
November 11, 2024

Hello @saikumar31 and welcome to the ST Community.

As you can see on the DS11585 Rev 19 page 30:

"The device exits Standby mode when an external reset (NRST pin), an IWDG reset,
WKUP pin event (configurable rising or falling edge), or an RTC event occurs (alarm,
periodic wakeup, timestamp, tamper) or a failure is detected on LSE (CSS on LSE)."

For more details, you can refer to this example. (Please read the readme file of the project).

Best Regards.

STTwo-32

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    S
    saikumar31Author
    Associate
    November 11, 2024

    Yes, i understood that give confirmation that upon configuring pin PC13 as an external interrupt instead of SYS_WK still is that possible to wakeup the device on an external interrupt event ?

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