STM32L051C8 comparator consumption

[Ufoit]

Hi,

I have a strange problem on an STM32L051C8 with the comparators enabled in window mode.
If I put the system in stop about 20 seconds after powering the microcontroller, the current draw is about 250 uA. If I then exit the stop mode with a soft reset and put the system back to stop after 20 seconds (without removing the power), the current draw is 0.42 uA.
The comparator is initialized in ultra_low_power mode with interrupt enabled to exit the stop mode.
What can I look at?
Thanks

[Ufoit]

ok, even if I haven't been able to verify it yet, it seems that it is just a problem in the input divider of the comparator which is close to the minimum working threshold...

[OOUAD]

Hello Ufoit,

Can you check if there are any pending interrupts before entering stop mode?

BR,

[Ufoit]

Now I have a different problem.

I put the system to stop with the comparator IRQ enabled. After about 2 seconds, I receive an IRQ that systematically wakes the micro from stop without any change in the comparator voltages. If I set the comparator speed mode to High (previously Low), this problem no longer occurs.

(This doesn't happen on another board with almost the same components but a different layout either.)

Is this normal?