Regarding "Unused program memory area" in the check list for code entry, it is described as follows.It is recommended to fill unused areas with data "0xFFFF" (BRK instruction) in the program memory space to ensure failsafe using the generation tool of the ROM code data.What should I do?
Use HTU8 regarding to set the unused area. By using HTU8, it is possible to fill 0xFFFF data in the unused program memory area. HTU8 is included in the U8/U16 Development Tools.