Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l0/STM32L052/Flash/ACR#0x0
Access control register
Latency
Prefetch enable
Flash mode during Sleep
Flash mode during Run
Disable Buffer
Pre-read data address
https://github.com/modm-io/cmsis-svd-stm32