Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l1/STM32L100/FSMC/BWTR1#0x0
BWTR1
ADDSET
ADDHLD
DATAST
CLKDIV
DATLAT
ACCMOD
https://github.com/modm-io/cmsis-svd-stm32