stm32f429 custom board - schematic review

[harry123]

• I am  using my own custom board which is replicate of stm32f429 disc1 development board.
• I replaced main mcu chip i.e stm32f429 and stlink chip from my disc1 board to my custom board. After using my custom board for for many days now it stopped working.
• The board is getting heated and st-link not detected error is getting popped one i connect usb power supply.
• I unable to find the reason for its failure.I have attached my custom board schematic.
• Now I want make another custom board with external debugger what changes I have to make in the schematic to make my board work like disc1 board.

[harry123]

I want to use my board same like STM32f4 disc1 which has got stlink in it.

If i use st-linkV3 which are all the pin I need to bring out from my MCU.

[AScha.3]

For miniE ( i use also ) :

https://www.st.com/en/development-tools/stlink-v3minie.html

-> read the manual...

https://www.st.com/resource/en/user_manual/um2910-stlinkv3minie-debuggerprogrammer-tiny-probe-for-stm32-microcontrollers-stmicroelectronics.pdf

So minimum for swd :  GND, VCC , SWD, SWC .

or "full".. , with VCP   : GND, VCC , SWD, SWC , SWO , NRST, RX , TX .

+ important :vcc needed to check and show the target supply, so its INPUT to st-linkV3 , not giving out power !

Your target cpu needs to be powered from separate/other supply, st-link needs vcc connected to check target voltage.