STM32 NRST line

[Ofer]

Hi,

We are using STM32L452 for our project.

We have problem with pin NRST.

We set a 30K pull-up resistor (with pull-down capacitor of 0.1uF).

Sometime voltage on the NRST pin is 3.3V and sometimes it is 1.4V.

In cases it is 1.4V the MCU is stuck.

We think that in case of 1.4V happens because a pin leakage current.

Do you have any solution for us ?

Thanks

[######]

As mentioned previously by others the NRST pin can actually act as an output. One other thing to check might be if your BOOT0 pin is correctly tied down for the boot mode you want to be executing from?