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Can I Use ST-LINK/V2-1 from Nucleo-F446RE to Program an External STM32 MCU?

MedSid
Associate

‎2025-03-26 5:54 AM - last edited on ‎2025-03-26 6:58 AM by

I have an STM32 Nucleo-F446RE, which comes with an integrated ST-LINK/V2-1 debugger. I would like to use this ST-LINK to program an external STM32 MCU that does not have a development board.

  • I checked the Nucleo schematics, and I see that ST-LINK/V2-1 can be used for external programming.

  • I know that I need to connect SWDIO, SWCLK, GND, and  VDD to the external MCU.

  • I removed the two jumpers from CN2 to disconnect ST-LINK from the onboard STM32F446RE.

Before proceeding, I want to confirm if this setup is correct, if I need additional components like resistors or capacitors, or if I should buy a dedicated ST-LINK V2 instead.

I appreciate any guidance to help me solve this problem.

Thank you in advance.


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STTwo-32
ST Employee

‎2025-03-26 6:12 AM - edited ‎2025-03-26 7:22 AM

Salam @MedSid and welcome to the ST Community.

Your setup should be working just fine. You can use the ST-LINK/V2-1 from Nucleo-F446RE to Program an External STM32 MCU. More details are available on the answer of this post and UM1724.

Best Regards.

STTwo-32

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Andrew Neil
Guru

‎2025-03-26 7:01 AM

Of course - instructions are in the User Manual:

AndrewNeil_0-1742997643136.png

https://www.st.com/resource/en/user_manual/um1724-stm32-nucleo64-boards-mb1136-stmicroelectronics.pdf#page=18

via: https://www.st.com/en/evaluation-tools/nucleo-f446re.html#documentation

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.
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