Flash Write Mode

The Flash Write mode (FLWR) of the Flash controller enables writes to the Flash array to start a program operation. Several writes can be done while the Flash write mode is enabled in the NVMCTRL.CTRLB register. When the write mode is enabled, one word is written at a time.

Before a write is performed, the address need to be erased using a suitable command.

If the row resides in a region that is locked (either through BOOTPROT and/or LOCK bits), the write will not be performed, and the Lock Error bit in the Status register (STATUS.LOCKE) set.