Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet

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Atmel | SMART SAM D21 [DATASHEET]

Atmel-42181C–SAM-D21_Datasheet–07/2014

The device calibration data are stored in different sections of the NVM calibration and auxiliary space presented in 

The values from the automatic calibration row are loaded into their respective registers at startup. 

The NVM User Row contains calibration data that are automatically read at device power on.

The NVM User Row can be read at address 0x804000.

To write the NVM User Row refer to 

.

Note that when writing to the user row the values do not get loaded by the other modules on the device until a device 
reset occurs.

0x00800000

AUX0 offset address

Automatic calibration 

row

Calibration and auxiliary 

space address offset

AUX0 – NVM User 

Row

AUX1

0x00804000

0x00806000

AUX1 offset address

0x00806000

Area 3 offset ad

Area 1: Reserved (64 bits)

Area 2: Device configuration 

area (64 bits)

Area 1 address 

Area 2 offset ad

Area 3: Reserved 

(128bits)

Area 4: Software 

calibration area (256bits)

0x00806008

0x00806010

0x00806020

Area 4 offset add

AUX1

0x00806040

000000

NVM base address 

+ NVM size

NVM main address 

space

NVM Base Address

Calibration and 

auxiliary space

800000

NVM base address + 

0x00800000