Техническая Спецификация для Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO

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Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129K–SAM-D20_datasheet–06/2014
9.4
NVM Software Calibration Area Mapping
The NVM Software Calibration Area contains calibration data that are measured and written during production test. 
These calibration values should be read by the application software and written back to the corresponding register.
The NVM Software Calibration Area can be read at address 0x806020.
The NVM Software Calibration Area can not be written.
Table 9-4.
NVM Software Calibration Area Mapping
9.5
Serial Number
Each device has a unique 128-bit serial number which is a concatenation of four 32-bit words contained at the following 
addresses:
Word 0: 0x0080A00C
Word 1: 0x0080A040
Word 2: 0x0080A044
Word 3: 0x0080A048
The uniqueness of the serial number is guaranteed only when using all 128 bits.
Bit Position
Name
Description
2:0
Reserved
14:3
Reserved
26:15
Reserved
34:27
ADC LINEARITY
ADC Linearity Calibration. Should be written to 
37:35
ADC BIASCAL
ADC Bias Calibration. Should be written to 
 register.
44:38
OSC32K CAL
OSC32KCalibration. Should be written to 
 register.
57:45
Reserved
63:58
DFLL48M COARSE CAL
DFLL48M Coarse calibration value. Should be written to th
 
register.
73:64
DFLL48M FINE CAL
DFLL48M Fine calibration value. Should be written to the 
127:74
Reserved