Memory mapping in RM0432 Rev. 5 - STM32L4R5, R7, R9 wrong?!
Fig. 2 (Memory map) seems to be incorrect as it states
OctoSPI bank2: below 0x60000000
FMC bank1: 0x60000000 - 0x6FFFFFFF
Reserved: 0x70000000 - 0x7FFFFFFF
FMC bank3: 0x80000000 - 0x8FFFFFFF
OctoSPI bank1: 0x90000000 - 0x9FFFFFFF
But OctoSPI bank2 is certainly at 0x70000000 - 0x7FFFFFFF (verified on hardware). Probably the 'Reserved' and 'OctoSPI bank2' are swapped.
The same error appears in the corresponding datasheet for STM32L4R5xx, STM32L4R7xx, STM32L4R9xx.
