Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Fiche De Données

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Atmel | SMART SAM D21 [DATASHEET]

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

For the DMAC to know from where to where it should transfer the data, each block transfer needs to have a source and 
destination address defined. The source address can be set by writing the Transfer Source Address (

) 

register, and the destination address can be set by writing the Transfer Destination Address (

The addressing of this DMAC module can be static or incremental, for either source or destination of a block transfer, or 
both.

Incrementation for the source address of a block transfer is enabled by writing the Source Address Incrementation 
Enable bit in the Block Transfer Control register (

.SRCINC) to one. The step size of the incrementation is 

configurable and can be chosen by writing the Step Selection bit in the Block Transfer Control 

Block Transfer

Block Transfer

Trigger

BUSYCHn

CHENn

Data Transfer

PENDCHn

Trigger Lost

Block Transfer

Block Transfer

Trigger

BUSYCHn

CHENn

Data Transfer

PENDCHn

Trigger Lost

Block Transfer

Block Transfer

Trigger

BUSYCHn

CHENn

Data Transfer

PENDCHn

Trigger Lost