--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/PDK/Source/GUID-C649DB97-F138-4C90-B177-16590F2E3F19.dita	Fri Jan 22 18:26:19 2010 +0000
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-C649DB97-F138-4C90-B177-16590F2E3F19" xml:lang="en"><title>DMA
+Channels</title><shortdesc>This document describes how device drivers use DMA channels.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>The DMAC has different DMA channels that can be configured for different
+DMA transfers. Drivers generally initialise and open the required DMA channel
+and use this channel to do the DMA transfers. For some peripherals, such as
+the Camera and the Display controller, there can be dedicated DMA channels
+that cannot be configured for DMA transfers by other peripherals. </p>
+<p>Initialization and opening of DMA channels is done using the interface <xref href="GUID-83882548-FAC5-3EFF-92ED-14D1D9A85D37.dita"><apiname>TDmaChannel</apiname></xref>. </p>
+<note>This class is designed only for single-thread client access. When used
+by multi-threaded clients, synchronisation mechanisms should be provided by
+the driver. </note>
+<p>DMA channels must be opened before use and closed after completion of DMA
+operations, as shown below. </p>
+</conbody></concept>
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