Could we keep the gpio status at standby mode for STM32L0?

[Peter BENSCH · Accepted solution]

As you can find from the respective reference manual (RM0451, RM0377, RM0367) section 6.3.10:

I/O states in Standby mode

In Standby mode, all I/O pins are high impedance except for:

• Reset pad

• Wakeup pins (WKUP1, WKUP2, WKUP3)

• RTC functions (tamper, time-stamp, RTC Alarm out, RTC clock calibration out) [...]

Does it answer your question?

Regards

/Peter

[HungKai.Chien]

Hi Peter,

Thanks your answer.

In the STM32L4 series, we can set the internal pull-up in Standby mode to keep the pin voltage at High.

HAL_PWREx_EnableGPIOPullUp(PWR_GPIO_A, PWR_GPIO_BIT_0);

HAL_PWREx_EnablePullUpPullDownConfig();

Is there a similar way to achieve this in the STM32L0 series?

[Peter BENSCH]

Unfortunately this is not possible. The STM32L4 uses a different implementation of the GPIO than the STM32L0.

If the problem is resolved or answered, please mark this topic as answered by selecting Select as best. This will help other users find that answer faster.

Good luck!

/Peter