Connect the board to the host PC using an IAR I-jet debugger hardware and a 20-pin JTAG connector.

1. Create an empty flash_bootloader.bat file and add the following contents to it:

   set QUL_ROOT=C:\Qt\QtMCUs\3.0.0
   set IAR_TOOLCHAIN_DIR="C:\Program Files (x86)\IAR Systems\Embedded Workbench 9.2"
   
   "%IAR_TOOLCHAIN_DIR%/common/bin/cspybat" "%IAR_TOOLCHAIN_DIR%/arm/bin/armproc.dll" "%IAR_TOOLCHAIN_DIR%/arm/bin/armJET.dll" ^
   --plugin %IAR_TOOLCHAIN_DIR%/arm/bin/armbat.dll ^
   --device_macro %IAR_TOOLCHAIN_DIR%/arm/config/debugger/Nuvoton/KM2KSD4XXX(Gerda-4L).dmac ^
   --flash_loader "%IAR_TOOLCHAIN_DIR%/arm/config/flashloader/Nuvoton/Gerda-4L.board" ^
   --debug_file=%QUL_ROOT%\bin\bootloaders\nuvoton\gerda-4l-uitron_bootloader.elf ^
   --leave_target_running ^
   --backend ^
   --endian=little ^
   --cpu=Cortex-M7 ^
   --drv_vector_table_base=0x0 ^
   --fpu=VFPv5_D16 ^
   -p %IAR_TOOLCHAIN_DIR%/arm/config/debugger/Nuvoton/KM2KSD4XXX(Gerda-4L).ddf ^
   --drv_verify_download ^
   --semihosting ^
   --device=KM2KSD4XXX(Gerda-4L) ^
   --multicore_nr_of_cores=1 ^
   --jet_standard_reset=9,0,0 ^
   --reset_style=\"0,-,0,Disabled__no_reset_\" ^
   --reset_style=\"1,-,0,Software\" ^
   --reset_style=\"2,-,0,Hardware\" ^
   --reset_style=\"3,-,0,Core\" ^
   --reset_style=\"4,-,0,System\" ^
   --reset_style=\"9,ConnectUnderReset,1,Connect_during_reset\" ^
   --drv_catch_exceptions=0xff0 ^
   --jet_board_cfg=%IAR_TOOLCHAIN_DIR%/arm/config/debugger/Nuvoton/KM2KSD4XXX(Gerda-4L).ProbeConfig ^
   --drv_trace_settings=None ^
   --drv_trace_size=25 ^
   --board_file=%IAR_TOOLCHAIN_DIR%/arm/config/flashloader/Nuvoton/Gerda-4L.board

2. Edit the paths QUL_ROOT and IAR_TOOLCHAIN_DIR.
3. Open command prompt and run the flash_bootloader.bat script as shown below:

   flash_bootloader.bat