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I am having customized PCB board for particular application. i connected pcb board through ST-LINK/V2 through which i shaving 5 pins . 5V,GND, JTCK,JTNS,NRST. My question is should i connect external power supply to flash the program ?

SBHAT.2
Associate II

should i connect external power supply to flash the program.

when i connect ST-LINK/V2 to PCB board i get the error called "no cortex-m device found".

"no target is connected".

Please anyone help me to flash the program to my customised pcb board.

4 REPLIES 4
SBHAT.2
Associate II

in the above pin it is JTMS

AScha.3
Chief

If the CPU is not powered by the st-link, then you need to power it by external power supply.​

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SBHAT.2
Associate II

from the ST-LINK


_legacyfs_online_stmicro_images_0693W00000bkwJLQAY.pngThis is the connection

AScha.3
Chief

Check on board: is CPU vdd 3.3 V ?

And connect: software reset mode .​

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