I want to use the STLinkV2 on the nucleo board I have to program an external STM32f4, and I have the SWD pins connected according to section 6.2.4 in the documentation.An earlier unsuccessful attempt to use an ftdi breakout didn't work, but the 5v Vdd could power the board. However, the STLink cannot since it's 3v3, so I need to power both boards. I'm worried that when I power up the second board I may damage the programmer, since the STLink is 3v3, and Vdd on the target board is 5v. I know some of the pins are 5v tolerant, but I'm not sure which ones, and I don't know how to proceed. My current plan is to connect only ground and the data pins and leave Vdd separate, will this work?