SBSFU on STM32WB

Hello

I am implementing the SBSFU on STM32WB.

Thus I have a question on the figure 53 page 88 in UM2262 Rev 6.

I need to have the "Loader" inside the "Active image", since the active image links the BLE software stack and OTA will be done via BLE. So the user application of the "Active image" needs write access to the "Download image" region.

Is this possible? How can I do?

Best regards

Paul