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GlitchyCat
Visitor II
May 23, 2026
Question

Is there a list of SBs on STM32F723E-DISCO?

  • May 23, 2026
  • 3 replies
  • 90 views

Is there a standard list of SB's? I cannot for the life of me figure out the SB's on the STM32F723E-DISCO, and none of the manuals mention anything about them other than if open is on or off. I am specifically trying to use the debugger for my custom PCB based off the same MCU. 

Any help would be greatly appreciated!

    3 replies

    Andrew Neil
    Andrew Neil
    Super User
    May 23, 2026

    Usually, you would expect to find this in the User Manual - but it doesn't seem to be there at all.

    So you'll just have to look through the schematics...

    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.
    waclawek.jan
    waclawek.jan
    Super User
    May 23, 2026

    Hi@Andrew Neil ,

    isn't UM2140 the proper user manual for this board? Am I overlooking something?

    Btw. there are relatively few solder bridges on this board. It's quite crammed and it is not really intended to provide flexibility in its usage beyond handling the onboard circuitry. This was that era of the DISCO boards where the Nucleos were already available so those were intended to serve for more flexible purpose.

    IMO the onboard STLink is unusable for programming other boards. While there are SB10..SB13 to disconnect STLink from the onboard target, there is no connector at the STLink side to bring its signals out of the board, only a "TAG" footprint, which is intended for the opposite purpose, to program the on-board STM32 using an external STLink (or other debugger).

    JW

    waclawek.jan
    waclawek.jan
    Super User
    May 23, 2026

    [I've separated this post from this thread, as it has a different scope. Next time, please start your own thread, with perhaps giving link to other possibly related threads.]

    I've had a look at UM2140 and indeed, contrary to older DISCO boards, no SB list there. ST appears to have gradually lost interest in making the DISCO boards an attractive way to introduce potential users to the individual STM32 families; these days they barely make new DISCO boards at all (and they even frown upon the DISCO/DISCOVERY name these days). Instead, they focus on (read: throw the money onto) various Cubes. Well, that's their decision, with which I cannot agree less, but can do nothing but accept it and perhaps rant here a bit... :)

    A better source for SB's positioning (and from that, judging on their functionality) may be the DISCO board's schematics, a pdf under "CAD RESOURCES" tab on the DISCO board's web folder.

    > I am specifically trying to use the debugger for my custom PCB based off the same MCU.

    I'm not sure why would you need to know about the SBs at the DISCO board to achieve this. Do you want to use the DISCO board's STLink to do that? Isn't buying a standalone STLink an option for you?

    JW

     

      Andrew Neil
      Andrew Neil
      Super User
      May 23, 2026
      @GlitchyCat wrote:

       I am specifically trying to use the debugger for my custom PCB based off the same MCU. 

      I think that's a separate question, which deserves a separate thread.

      As @waclawek.jan said, you can always link back to this (and other) threads for reference - if you feel it helps.

       

      I think the question here - about the list of SBs - has been answered, so please mark the solution on whichever post you think provided the best answer (not this one!)

      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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