Reading of the Flash/EEPROM and writing of the page buffer is handled with normal load/store instructions. Other operations, such as writing and erasing the memory arrays, are handled by commands in the NVM.

To execute a command in the NVM:
  1. 1.Write the NVM command unlock to the Configuration Change Protection register in the CPU (CPU.CCP).
  2. 2.Write the desired command value to the CMD bits in the Control A register (NVMCTRL.CTRLA) within the next 4 instructions.