Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

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Source peripheral: Device on an AMBA layer from where the DMAC reads data, which is then stored in the
channel FIFO. The source peripheral teams up with a destination peripheral to form a channel. 

Destination peripheral: Device to which the DMAC writes the stored data from the FIFO (previously read from the
source peripheral). 

Memory: Source or destination that is always “ready” for a DMAC transfer and does not require a handshaking
interface to interact with the DMAC.

Programmable Arbitration Policy: Modified Round Robin and Fixed Priority are available by means of the
ARB_CFG bit in the Global Configuration Register (

). The fixed priority is

linked to the channel number. The highest DMAC channel number has the highest priority.

DMA Destination

DMA Channel 0

DMA Destination
Control State Machine
Destination Pointer
Management

DMA Source
Control State Machine
Source Pointer
Management

DMA FIFO Controller

DMA FIFO

Up to 64 bytes

DMA Channel 0
Read data path
from source

DMA Channel 0
Write data path
to destination

DMA Channel 1

DMA Channel 2

DMA Channel n

External
Triggers

Soft
Triggers

DMA
REQ/ACK
Interface

Trigger Manager

DMA Interrupt
Controller

Status
Registers

Configuration
Registers

Atmel APB rev2 Interface

DMA AHB Lite Master  Interface 0

DMA Global Control 

and Data Mux

DMA Global

Request Arbiter

DMA Source

Requests Pool

DMA Read

Datapath Bundles

DMA
Atmel
APB
Interface

DMA Interrupt

DMA
Hardware
Handshaking
Interface

AMBA AHB Layer 0