• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

after few times programming debugger can't recognize microcontroller(stm32f101vbt6)


New Member
hello every one
I'm using stm32f101vbt6 by st-linkv2 programmer.
after few times programming my micro i get this message : no target connected. so my debugger can't recognize microcontroller.
i checked every connection and it was ok I tried j-link programmer but j-link couldn't recognize micro too. so i changed micro and programmed micro few times and this problem happend again for three times.
in my pcb design i connect SWDIO from programmer to micro and between them i put 330 ohm resistor.same thing for SWCLK as the picture uploaded.
in my board when programming i'm connect my power plug on from adapter
i don't know why this happening.is it because of ESD(Electrostatic Discharge)?Is my design has any problems?
i didn't have this problem for stm32f103.

appreciate your help.



Well-Known Member
Most Helpful Member
What is your code doing? I've had problems in the past when using peripherals that use the programming pins, when I²C hangs mid transfer. Are you able to completely erase the chip in question? Does that fix the problem?


Latest threads

EE World Online Articles