2025-06-23 4:40 AM - last edited on 2025-06-23 5:00 AM by KDJEM.1
hi~!
I made a IOT prototype with STM32U031K8T6, but I can't download firmware.
The connection isn't working ad it should, can anyone tell me the issues with the attacked circuit ??
I've tried both j-link and st-link download tools.
please reply from users who have used STM32U031.
2025-09-25 4:49 AM - last edited on 2025-09-25 5:09 AM by Andrew Neil
STM32U031K8U6 SWD Download fail
"Write protection is enabled."
"IC purchased from Digi-Key"
"Unable to download after compiling in STM32CubeIDE."
"The connection frequently drops in STM32CubeProgrammer."
SWD 5PIN: +3.3V, SWDIO, SWCLK, NRST, GND
st VLINK V2
"The STM32F469 is working properly using the ST-LINK V2."
2025-09-25 4:52 AM
"After purchasing from Digi-Key and connecting with ST-Link Utility, I found that it is write-protected."
2025-09-25 5:52 AM
You posted a screenshot of the ST-LINK/V2 from the website, but I asked for a photo of the front and back of the ST-LINK/V2 in front of you.
The ST-LINK Utility is long outdated and no longer works with newer MCUs such as the STM32U.
Regards
/Peter