FAQs
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 

Debug modes

Go to solution
dbessone
Associate

‎2026-04-13 2:07 AM - last edited on ‎2026-04-15 8:08 AM by

I noticed that STM32CubeMX2 (DEBUG features page) offers only three debug modes: JTAG 4‑pin, JTAG 5‑pin, and Single Wire Trace Asynchronous.
In many practical cases, developers use only the SWCLK and SWDIO lines to save pins, so the absence of a simple Serial Wire option (without Trace) seems to be a limitation of the current STM32CubeMX2 release.
This option is still available in STM32CubeMX1 when working with similar MCUs, such as the STM32H5 series.
Is this understanding correct?

1 ACCEPTED SOLUTION

Accepted Solutions
Go to solution
STackPointer64
ST Employee

‎2026-04-13 2:17 AM

Hello @dbessone, and Welcome to ST Community!

This issue has already been reported internally under ticket number CDM0060745, so the trace line is not pin-locked when Serial Wire is selected.

Best regards,

To improve visibility of answered topics, please click 'Accept as Solution' on the reply that resolved your issue or answered your question.

View solution in original post

1 REPLY 1
Go to solution
STackPointer64
ST Employee

‎2026-04-13 2:17 AM

Hello @dbessone, and Welcome to ST Community!

This issue has already been reported internally under ticket number CDM0060745, so the trace line is not pin-locked when Serial Wire is selected.

Best regards,

To improve visibility of answered topics, please click 'Accept as Solution' on the reply that resolved your issue or answered your question.
Top