Datasheet

Figure 22-3. NVM Memory Organization

Calibration and

Auxillary Space

RWWEE

Address Space

NVM Main

Address Space

NVM Base Address + 0x00800000

NVM Base Address + 0x00400000

NVM Base Address + NVM Size

NVM Base Address

The lower rows in the NVM main address space can be allocated as a boot loader section by using the

BOOTPROT fuses, and the upper rows can be allocated to EEPROM, as shown in the figure below.

The boot loader section is protected by the lock bit(s) corresponding to this address space and by the

BOOTPROT[2:0] fuse. The EEPROM rows can be written regardless of the region lock status.

The number of rows protected by BOOTPROT is given in Boot Loader Size, the number of rows allocated

to the EEPROM are given in EEPROM Size.

SAM D21 Family

NVMCTRL – Nonvolatile Memory Controller

Datasheet Complete

DS40001882D-page 386