The memory map of  EFR32MG22C224F512IM40 is as below if you use the Local storage bootloader. the flash size for app is 216K.

Hi cdjackson,

Can you include the header file "em_emu.h" in your source file?

Thanks,

Jim

The memory map of  EFR32MG22C224F512IM40 is as below if you use the Local storage bootloader. the flash size for app is 216K.

This is a manufacture attribute, you have to set the Manufacture Specific bit and add the manufacture code to your write attribute command.