Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Nuvoton/NUC1xx_registers/SCS/CPUID#0x0
CPUID Register
Reads as 0x0
Reads as 0xC20
Reads as 0xC for ARMv6-M parts
Implementer code assigned by ARM. ( ARM = 0x41)
https://github.com/cmsis-svd/cmsis-svd-data