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<title>SVD File Schema Levels</title>
<title>CMSIS-SVD: SVD File Schema Levels</title>
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<div id="projectname">CMSIS-SVD
 <span id="projectnumber">Version 1.3.1</span>
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<div id="projectbrief">CMSIS System View Description</div>
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<div class="title">SVD File Schema Levels</div> </div>
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<tr class="memitem:group__svd__xml__device__gr"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__svd__xml__device__gr.html">Device Level</a></td></tr>
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<tr class="memitem:group__svd__xml__peripherals__gr"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__svd__xml__peripherals__gr.html">Peripherals Level</a></td></tr>
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<tr class="memitem:group__svd__xml__enum__gr"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__svd__xml__enum__gr.html">Enumerated Values Level</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
<p>This section specifies the <b>SVD file format</b> Version 1.0. Each subsection defines one level of hierarchy and lists all mandatory and optional language elements as well as their type. A brief example description snippet demonstrates the usage of the elements. </p>
<dl class="section note"><dt>Note</dt><dd><ul>
<li>The sequence of elements in CMSIS-SVD is mandatory.</li>
<li><span class="opt">Optional elements</span> are highlighted in green.</li>
<li><span class="mand">Mandatory elements</span> are highlighted in blue. Optional sections can contain mandatory elements, which must be specified when the optional section is used. In this case the mandatory elements are also highlighted in blue.</li>
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<h1><a class="anchor" id="Names"></a>
Names</h1>
<p>All <b>name</b> tags must comply with the ANSI C identifier naming restrictions (identifierType). In particular they must not contain any spaces or special characters. This is necessary to support the generation of device header files thus providing consistency between the names being shown by the debugger and the symbols being used in the CMSIS compliant target software.</p>
<h1><a class="anchor" id="Constants"></a>
Constants</h1>
<p>Number constants shall be entered in hexadecimal, decimal, or binary format. </p>
<ul>
<li>The Hexadecimal format is indicated by a leading <b>"0x"</b>. </li>
<li>The Binary format is indicated by a leading <b>"#"</b>. </li>
<li>All other formats are interpreted as decimal numbers. </li>
<li>The value tag in <em>enumeratedValue</em> accepts <em>'do not care'</em> bits represented by <b>"x"</b>.</li>
</ul>
<h1><a class="anchor" id="Comments"></a>
Comments</h1>
<p>Comments have the standard XML format. </p>
<ul>
<li>Start a comment with <b>"<!–"</b>. </li>
<li>End a comment with <b>"–>"</b>.</li>
</ul>
<h1><a class="anchor" id="_"></a>
Empty Tags</h1>
<ul>
<li>Single tags are not supported (for example, <name>).</li>
<li>The tag content must not consist of an empty string (instead, omit optional tags).</li>
</ul>
<dl class="section remark"><dt>Remarks</dt><dd>The latest <a class="el" href="group__schema__1__2__gr.html">CMSIS-SVD Schema File</a> is provided alongside this document. </dd></dl>
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