Pin PC13 in input mode with pull up option does not drive the pin high. STM32F411

[vrindar]

Hi,

I am trying to configure the pin PC13 in my STM32F411 device as Input with Pull up option and it is connected to a rotary encoder. At initial bootup time, the pin is in toggle state and after that, it is set to 0. In the same project, I also configured the RTC. This PC13 pin has an alternate function as RTC_AMP1, RTC_OUT, and RTC_TS. Could you please explain the reason for this?

Thanks and Regards

Vrinda R

[STTwo-32]

Hello @vrindar and welcome to the ST Community :smiling_face_with_smiling_eyes:.

I suggest you take a look at the errata mentioned on the errata 2.2.10 of the ES0287.

Best Regards.

STTwo-32