ST-LINK/V2-20 pinJTCK------8 th pin of MCUJTMS------7 thNRST------4 th GND------- 3 rdVdd---------2 nd only this much connection is there with my pcb to st-link/v2
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.