Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Hoja De Datos

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Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
31.5.9 Analog Connections
Not applicable.
31.5.10 Calibration
The output drivers for the DP/DM USB line interface can be tuned with calibration values from the production test. The 
calibration values must be loaded from the NVM Software Calibration Area into the USB Pad Calibration register 
(PADCAL) by software, before enabling the USB, to achieve the specified accuracy. Refer to 
.