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C5: Is BL_COM_CFG documented?

Uwe Bonnes
Chief

‎2026-05-18 4:28 AM - last edited on ‎2026-05-18 6:27 AM by

C5  implements a way to de-activate selected boot devices. This will allow to use the system bootloader on custom board were some activity on pins used by the bootloader but not used for the bootloader would inhibit use of the bootloader. This feature has been requested before and is very welcome.

However neither in RM0522 nor in AN2606 I find the explanation for the fifferent bits. Did I miss something?

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4 REPLIES 4
mƎALLEm
ST Employee

‎2026-05-18 4:54 AM

Hello,

Do you mean the details of these bits?

mALLEm_0-1779105212541.png

 

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Uwe Bonnes
Chief
In response to mƎALLEm

‎2026-05-18 5:04 AM

Yes.
The table tells "Note: For assignment of interfaces to register bits, see the bootloader documentation."
I did not find a bootloader documentation explaining the bits.

mƎALLEm
ST Employee
In response to Uwe Bonnes

‎2026-05-18 5:44 AM

Question raised internally over this internal ticket CDM0062722.

I'll get back to you as soon as I have a feedback.

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mƎALLEm
ST Employee

‎2026-05-18 6:08 AM

@Uwe Bonnes 

Thank you for accepting the post as solution but I prefer to unmark it until I provide an answer.

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