stm32 - How to use external ST-Link to debug/program STM32F103 MCU?

I'm using STM32F103 MCU for my own project and want to use the ST-Link of STM32F411 Nucleo board for external debugging / programming purposes.

I've set the CN2 jumpers OFF and my actual question is in the pinouts of SWO (CN2). How I proceed on this is as follows:

• PIN 1 (of SWO) is VDD_Target


• PIN 2 is SWCLK


• PIN 3 is GND


• PIN 4 is SWDIO


• PIN 5 is NRST


• PIN 6 is SWO

To the best of my knowledge, I shouldn't use all these pins above. As in, I've connected

• PIN 2 to PIN 37 (or PA14) in MCU


• PIN 3 to GND


• PIN 4 to PIN 34 (or PA13)


• PIN 5 to PIN 7 or (RESET) in target MCU.

Not sure if I should connect SWO pin as it's set as "reserved" (Why?). Also I'm giving 3.3 V to VIN pin of MCU, means that I don't need to connect VDD (PIN 1 of stlink).

Please refer to this table I've taken from the official datasheet:

Here's the general pinout configuration of the MCU here:

I've tested "almost" everything with oscilloscope and tester and everything seems okay. What else I'm missing here? Should I do anything with BOOT0 or BOOT1 pins?

Answer

First of all thanks to everyone for their contribution.

After two sleepless nights and struggle, I could find out the issue. The problem was in pin connections in my custom board: I thought that, in my MCU, Pin 9 (VDDA) is short-circuited with PINs 24-36-48, and Pin 8 (VSSA) with PINs 23-35-47, but it's not so.

I needed to give another 3.3V and GND to VDDA and VSSA and st-link started working.

Solution Method: I used Maple Mini schematics to understand the connections of STM32F103. It turned out that, they've short-circuited VDDA with VDD1, VDD2 & VDD3, and VSSA with VSS1, VSS2 and VSS3. I think, I should've understood this from the naming VSSA, as it's not VSS0 or VSS4.