Adaptation/GUID-058BAEDF-5E04-5BB4-928F-0E0528FD9465.dita
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+<?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-058BAEDF-5E04-5BB4-928F-0E0528FD9465" xml:lang="en"><title>MultiMediaCard
+Technology</title><shortdesc>MultiMediaCard (MMC) is a low cost data storage and communication
+media, and is defined by the <i>MultiMediaCard System Specification</i></shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p> The MMC specification is published by the <xref href="http://www.mmca.org" scope="external">MultiMediaCard Association</xref>. </p>
+<p>Communication is based on a 7-pin serial bus designed to operate in a low
+voltage range (2.0 - 3.6V). The MultiMediaCard specification defines a communication
+protocol referred to as MMC mode (0-20MHz). In addition, for compatibility
+with existing controllers, MultiMediaCards may offer an alternative communication
+protocol which is based on the SPI standard (0-5MHz). </p>
+<section id="GUID-69DA6510-AF66-566A-9B19-5554B4743D0B"><title> Omissions</title> <p>The
+following features of the MultiMediaCard System Specification are not provided
+in the Symbian platform MultiMediaCard controller: </p> <ul>
+<li id="GUID-75439A4B-28C8-58A6-81A8-92BF08F490A1"><p>Stream read and write
+operations are not supported. </p> </li>
+<li id="GUID-85C665FB-152C-5A94-A245-E99D44F384C2"><p>SPI bus mode is not
+supported. </p> </li>
+<li id="GUID-26F8D809-57EF-5CCB-99A5-BFDCA59A5F76"><p>The MultiMediaCard System
+Specification includes a feature where a MultiMediaCard can be put into a
+disconnected state. This can be performed on a card which is currently in
+the programming state, i.e. writing data to the disk. To place that card into
+the disconnected state involves placing another card into the transfer state,
+which means giving the other card the current data transfer focus. A disconnected
+card will not terminate the programming operation and, if re-selected, moves
+back to the programming state. The Symbian platform MultiMediaCard controller
+does not support this mode of operation even if the underlying hardware interface
+does. </p> </li>
+</ul> </section>
+</conbody></concept>
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