Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32F745/SCB/CPUID#0x0
CPUID base register
Revision number
Part number of the processor
Reads as 0xF
Variant number
Implementer code
https://github.com/cmsis-svd/cmsis-svd-data