Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Nuvoton/M05x_registers/FMC/ISPCMD#0x0
ISP Command Register
ISP Command ISP command table is shown below: Operation Mode FOEN FCEN FCTRL[3:0] Read 0 0 0 0 0 0 Program 1 0 0 0 0 1 Page Erase 1 0 0 0 1 0
https://github.com/cmsis-svd/cmsis-svd-data