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Associate II
Feb 17, 2025 4:24 PM UTC
Solved

STM32 Stuck in boot mode

LopsidedCoder_0-1739809281448.jpeg

I'm using the STM32H753ZIT6 NUCLEO Board. For some reason the User LED's are on by default even without any code on it. I tried to press the reset button but it would just blink the led's. I read on another forum to short the BOOT0 and Vdd pins but was hesitant to try that. The board works fine sometimes but it tends to give random/no outputs some times. 

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TDK
TDKBest answer
Feb 17, 2025 9:15 PM UTC

The LEDs will only turn on if the program running on the microcontroller turns them on. I'm not seeing a problem here, or a reason to believe they are misbehaving.

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3 replies

TDK
Feb 17, 2025 6:09 PM UTC

What makes you think it's stuck in boot mode?

The default program uses the LEDs on the board. Pressing the blue user button will cycle them.

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Associate II
Feb 17, 2025 6:14 PM UTC

My bad on that. The reason I thought this was a problem is because I have another board which runs fine but does not turn on the user LED's when I connect it to my laptop. What I feel is happening is that its stuck. Could you please correct me if I'm wrong?

TDK
TDKBest answer
Feb 17, 2025 9:15 PM UTC

The LEDs will only turn on if the program running on the microcontroller turns them on. I'm not seeing a problem here, or a reason to believe they are misbehaving.

"If you feel a post has answered your question, please click ""Accept as Solution""."