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STM32F4x9 dual bank on 1MByte devices

Question asked by opijozko on Sep 1, 2014
Latest reply on Sep 1, 2014 by Clive One
I cannot find some details about how this dual bank mode works. Can anybody make my questions clear?
If DB1M is enabled, does sectors numbering change also for WRP and/or PCROP protection setting?
If DB1M is enabled, can 1MByte device boot from bank 2 (bit BFB2)?
What will happen if DB1M will be enabled on device with different density (2MByte)?

Thanks a lot for your help.