Can 'ST-LINK V2' be used in 'DISCO-L072CZ-LRWAN1'?

[SYun.2]

Development Environment: KEIL (Free License)

보드 : DISCO-L072CZ-LRWAN1

Hello

To build a monitoring system with the LoRa protocol now.

It is being developed as a 'DISCO-L072CZ-LRWAN1' board.

I turned off the 'ST-LINK' built into the board to check the minimum current in the 'STANDBY mode' (removed SB37).

I have a 'ST-LINK V2'.

Can I connect my current 'ST-LINK' to 'DISCO-L072CZ-LRWAN1' for flashing?

I thought using the SWD interface in CN8 would be a flash.

So we connected SWD PINs of 'ST-LINK' and 'DISCO-L072CZ-LRWAN1'.

 I tried to flash by connecting 'SWCLK' pin and 'SWDIO' pin on 'CN8' No.2 and No.4

However, neither 'KEIL' nor 'ST-LINK utility' recognized the board.

I would appreciate it if you could let me know if I'm taking the wrong approach.

[Tesla DeLorean · Accepted solution]

You'd also need a common ground and the VTarget on the ST-LINK's pin 1 or 2 to power the buffers.

I've always used the on board ST-LINK, you might want to review the schematic thoroughly. ​

[SYun.2]

I didn't write about the GND.

Of course, we connected the common GND.

Does 'VTarget' mean to connect the power of the board to STLINK?

Did you mean 'board ST-LINK' included in the board? If correct, I posted a question because I wanted to remove the power of the ST-LINK and connect the external ST-LINK for development.

Thank you for your answers.

[SYun.2]

I solved it.

As you said, I connected VTarget with 3.3v on the board.

I don't think it was recognized because it wasn't connected to 3.3v. Thank you very much for your reply.