How to connect STM32H743 to ST-LINK V3SET via Serial Wire.

[JCho.3]

Hi.

I'm designing a circuit using STM32H743ZI.

I should add connectors to connect it to STLINK-V3SET.

However, I don't want to use 20 pin Box Header because it is too bulky.

For I only use SerialWire Interface to program and debug the MCU,

I want to use only necessary pins.

When I looked into the STLINK-V3, There is a connector(CN6) that includes

all the pins for SerialWire communication.

I think CLK should be connected to SWCLK, and DIO should be connected

to SWDIO. NRST should be going to NRST in the board. Right?

What is SWO in the picture then?

Should I connect that pin to TRACESWO(PB3)?

What is the function of it?

[Tesla DeLorean · Accepted solution]

PB3 SWO is the Serial Wire Viewer (SWV) which provides trace and debug uart functionality. Perhaps look at some ARM Technical Reference Manuals, or ST's Programming Manual

PA13 SWDIO/DIO

PA14 SWCLK/CLK

You could always use the 10-pin high density SWD connector

[JCho.3]

Thank you Tesla.

I'll only need 6 pins then. ;)

[mpen.1]

what about NREST ,VCC if it is connect to ext ,GND?

what about Vapp,TRST,TDI,NRST,VDD ?