@osman2 wrote:Do I need to give 3.3v from pin1 of the cn3 socket?
Again, see the User Manual - it tells you what connections you need to make between the ST-Link and your Target:
CN3 pin 1 (and pin 2) connects to the power supply (VCC) in the Target - it is an input to the ST-Link.
The voltage reported in the Log is what the ST-Link measures at this input.
Dear Andrew
Thank you in advance for your answer.
I have an electronic board I have an electronic board I have a cpu using stm32f103
according to the connection in the socket in the following picture I am connecting to the cn3 socket according to the photo I am connecting 1=1--2=3---3=9---4=7--- 5=20
I can't find where I went wrong.
Again, look at the User Manual:
Plus you need a GND connection - any one will do.
Since you are only using 2 pins for debug (plus NRST), you must be using SWD.
It would be more helpful to label your schematic with the SWD names (rather than JTAG names):
- JTCK = SWCLK
- JTMS = SWDIO
with ST-Link pin numbers:
