STM32L452 LSE & PC13 Errata

[MMeie.3]

Hi

We use an STM32L452 with an external LSE (32.786 kHz) oscillator. We would like to use PC13 as a GPIO input with interrupt.

In the errata sheet for the STM32L452 (ES0388 Rev9) I find the following entry:

“2.2.12 PC13 signal transitions disturb LSE

Description

The PC13 port toggling disturbs the LSE clock.

Workaround

None.“

What does “disturbs" mean for the LSE? What is the impact, if PC13 is used as a GPIO input with interrupt?

[waclawek.jan]

In the newest STM32F407 errata (ES0182 - Rev 15, 12-Feb-2024 ) the erratum in question has been rephrased (it's the only change in this version of errata):

(I guess other errata have been updated with similar wording, did not check).

JW