Nucleo-H753ZI connection error

[DeMar]

I am a beginner at stm32 Nucleo board, when I connect the board and the Lap, LD5 turns green but LD4 turns to green/red blinking, which means the voltage is correct but the MCU has no response or connection error. Could you please help with that?

[Pavel A.]

Green/red blinking by itself does not mean trouble. It just indicates activity. Where do you see "no response" or any error? CubeIDE or Programmer?

[Tesla DeLorean]

Perhaps try strapping BT0 (BOOT0) pin to VDD, and power cycle a couple of times. See if you can connect then.

Check the SMPS/LDO and VOS settings in your code.

[DeMar]

I used stm32programmer to connect the board, and the LD4 keep blinking red/green which means lap and board are unable to exchange data. And on IDE it shows "No st-link detected". Sorry if I misunderstood anything, I'm just a beginner.

[DeMar]

OK I will try! Thanks!

But I haven't written any code yet, I was trying to connect them.

[QSHAO.1]

About LD4 on Nucleo-H753ZI, it's called "ST-LINK COM LED". you may find details information about this LED function in TN1235.

Attached below also a capture of key information. thanks!

[Pavel A.]

@DeMar So the situation is that CubeProgrammer sees the ST-Link - but the IDE does not. The board is Nucleo, so "fake ST-Links" are excluded. May be, a bad cable or a driver issue caused by 3rd party software.

[Tesla DeLorean]

Only one application can connect to the ST-LINK at a time. You'll need to click "Disconnect" in STM32 Cube Programmer to use from the IDE.

Bad cables, or charging only cables can lead to issues with connectivity. Check if you can see the ST-LINK enumerated in Device Manager.

For ST-LINK/V2 avoid using hubs or docking stations.