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Adaptation/GUID-D089C2E9-1BE4-4B37-B8A8-21E5B2425E6C.dita
author Graeme Price <GRAEME.PRICE@NOKIA.COM>
Fri, 15 Oct 2010 14:32:18 +0100
changeset 15 307f4279f433
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License
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"Eclipse Public License v1.0" which accompanies this distribution,
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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    Nokia Corporation - initial contribution.
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Contributors:
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-->
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<!DOCTYPE concept
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="GUID-D089C2E9-1BE4-4B37-B8A8-21E5B2425E6C" xml:lang="en"><title>SDIO
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Technology Guide</title><shortdesc>Provides information about the concepts and the uses of the SDIO
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card.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
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<section id="GUID-075122CD-EA1E-4567-9D0F-5DFA548DA883">       <title>Purpose</title>
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     <p>The Secure Digital Input/Output (SDIO) protocol is based on the SD
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memory card protocols. The SDIO bus enables high speed data transfers between
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the host and a card. The SDIO consumes low power and is efficient for use
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in mobile devices. SDIO cards like SD cards use star topology that have dedicated
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command and data signals. The purpose of the SDIO APIs is to enable easy porting
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of the Symbian SDIO services for a particular SDIO controller.</p>
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   </section>
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<section id="GUID-57C125FF-4196-40D7-B1E5-DDA292076916"><title>Key concepts</title><ul>
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<li><p><b>SDIO controller:</b></p> is the executable that manages access to
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the SDIO card hardware interface and provides an API for class drivers to
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access SDIO card functions.</li>
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</ul><ul>
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<li><p><b> Stack:</b></p>handles multiple requests simultaneously.  It internally
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schedules the requests on to the bus and allocates the appropriate card to
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transfer data accordingly.</li>
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</ul><ul>
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<li><p><b>Session:</b></p> sets up a session object to perform SDIO specific
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command sequences.</li>
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</ul><ul>
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<li><p><b>Register interface:</b></p> allows single byte read/write operations
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to a given register address together with the corresponding ones for multi-byte
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access. </li>
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</ul></section>
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<section id="GUID-16D2B044-0E5A-4126-ADAC-B297C4B616F8"><title>Typical Uses</title><ul>
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<li><p>Powering up stack containing a single SDIO Card.</p></li>
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<li><p>Sending a command to PSL.</p></li>
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<li><p>Acquiring new cards into the SDIO stack.</p></li>
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<li><p>Configuring an SDIO card.</p></li>
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</ul></section>
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</conbody></concept>
MCL/sftools/depl/docscontent