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STLinkV2 detected Cannot connect to target

tyee
Associate

Hi all

I am new learner for use the STLink V2 programmer.I'm detect the error "cannot connect to the target" unable program to my MCU.I use my JTAG 20 pins connector and use few pin NRST,VCC,GND,SWDIO,SWCLK connect to my UUT connector .And also power 28V to my UUT.

My UUT MCU device name is STM32F091 and crystal 8MHz

Hope you all can give me advise .Thanks

Please refer to my image.0690X000006CKztQAG.jpg0690X000006CKzoQAG.jpg0690X000006CKzjQAG.jpg0690X000006CKzeQAG.jpg

Hope anyone can help me .Thanks.

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