The system always boots at address 0x0. To ensure maximum boot possibilities, the memory layout can be changed using GPNVM bits.
A GPNVM bit is used to boot either on the ROM (default) or from the Flash.
The GPNVM bit can be cleared or set, respectively, through the commands “Clear General-purpose NVM Bit” and “Set General-purpose NVM Bit” of the EEFC User Interface.
Setting the bit GPNVM1 selects boot from the Flash. Clearing it selects boot from the ROM. Asserting ERASE resets the bit GPNVM1 and thus selects boot from ROM.