New Custom STM32H743BI board PCB ST-Link "Error: No STM32 target found" ? Need Help!

[GRK.1]

Hi Everyone,

Hope you are doing well.

I am not able to connect my new custom board based on STM32H743BI with STM32CubeProgrammer using STLINK-V3SET. and get the "Error: No STM32 target found" when i try to connect.

As suggested in different threads i have confirmed the following:

• Reset is pulled high
• Boot0 is pulled low
• VDD is stable at 3..28V at all desired pins of the board
• VCAP 1&2 connected to 2.2uF capacitors showing voltage of 1.01V.
• VDDA is 3.28V, VSSA is Grounded,

I am using a 10 pin SWD connector.

The Circuit diagram is shown below

Thanks,

[Tesla DeLorean · Accepted solution]

Given the low voltage reported by the programmer, you'll probably want to double check the orientation and connector you have for the SWD cable.

Make sure that Pin#1 matches properly, and the connector isn't rotated/backward

Check the pin numbering as laid out on the PCB

[GRK.1]

Thank You so much.....

You made my day.

it was the problem of connector footprint. it was supposed to be mirrored vertically. Now i am able to connect and programmed the MCU.

Thanks again