Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series0/EFM32GG/EFM32GG942F512/ETM/ETMITATBCTR2#0x0
ETM Integration Test ATB Control 2 Register
ATREADY Input Value
https://github.com/cmsis-svd/cmsis-svd-data