STM32L4A6VG BFB2 BUG

Hi,

We recently upgrade from stm32L476VG to STM32L4A6VG to have more RAM. However it seems like the BFB2 bit that could be set with ST-LINK is not working on this platform. In fact, when we set the BFB2 bit the mcu program counter goes to the system memory  0x1fff0718.

We have the Boot 0 pin pull down with 10k resistor and essentially didn't change the pcb since both board have the same footprint.

We also tried using the nSWBoot0 option bit that we can found in the errata

http://www.st.com/content/ccc/resource/technical/document/errata_sheet/group0/53/9a/db/26/c5/a9/4d/6d/DM00264473/files/DM00264473.pdf/jcr:content/translations/en.DM00264473.pdf

But that didn't help either since we don't have the read protection level 1 but level 0