Can't reset the core

[JS8]

Hi,

When attempting to connect to an STM32F030C8T6 MCU, ST-LINK Utility gives the following error message:

"Can not connect to target!
If you're trying to connect to an STM32W1xx device, please select Normal or HotPlug mode from Target->Settings menu.
If you're trying to connect to a low frequency application , please select a lower SWD Frequency mode from Target->Settings menu.
Can't reset the core"

I have it connected via SWD. Pin 19 of ST-LINK/V2 is connected to the VDD of the MCU. Pin 1 is connected to VDD of the MCU. GND of MCU is connected to pin 20 of ST-LINK.

How can I fix this error? I've had the same setup before and that has worked. This is the first time I'm getting this error. I've tried rebooting my PC & ST-LINK. I can't erase the chip because the ST-LINK Utility can't connect to it.  

[AScha.3]

Hi, 

ST-LINK Utility is old and deprecated.

Use stmCubeProgrammer !       https://www.st.com/en/development-tools/stm32cubeprog.html

download, install - then try with this to connect.

[JS8]

Hi,

I tried to connect with Stm32CubeIDE, didn't work.

[Imen.D]

Tried connecting it through STM32CubeProgrammer.

Try Connect Under Reset option.

[JS8 · Accepted solution]

Hi,

I didn't change anything, but it works now. (??)

[Imen.D]

Glad to know the issue has been solved 🙂

Disconnecting and connecting the board may have solved your problem!