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Version STM32F439 bootloader

Question asked by Ohil on Jul 1, 2014
Latest reply on Jul 1, 2014 by Clive One

In AN2606 I read  STM32F429xx/439xx can have bootloader V7.x or V9.x. but I don't find information (for exemple in DM00068628 STM32F42xx and STM32F43xx Errata sheet).  Does the version depend of the date of manufacturing, or package or something else?
V9 create more electrical conflicts than V7 which require additionnal component to be solved because it activate more peripheral when bootloader is running. For everytime ST increase the number of peripherals activated by the bootload may be our schematic will must be updated and that have a significant cost. Does ST can increase once more time the number of peripheral used by the bootloader?
If the outputs of each used peripherals are in the high impedance before to receive a valid message for the bootloader, no additional components must be used to avoid electrical conflicts. But I don't find any information about that.
Does somebody have more information?