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STM32WB stack update overwrite M4 application

Jiri VLCEK
ST Employee

on ‎2022-09-20 4:58 AM - edited on ‎2025-08-01 12:22 AM by Community manager

Why does STM32CubeProgrammer erase/overwrite data (Cortex-M4 application) at flash address (0x08000000) during STM32WB Stack update over SWD?

FUS can be managed only from internal bootloader or internal memory

If SWD is used (means no-bootloader), there must be special software (called FUS operator) loaded to Flash memory. FUS operator can manage FUS commands then. Loading of FUS operator to flash memory overwrites Cortex-M4 application available at address 0x08000000.
More information about FUS can be found in Application note AN5185.
 

119.png

Figure 1 - Loading FUS operator to flash
 
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Last update:
‎2025-08-01 12:22 AM
Updated by:
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