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onmouseout="return searchBox.OnSearchSelectHide()" + onkeydown="return searchBox.OnSearchSelectKey(event)"> +<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Macros</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Pages</a></div> + +<!-- iframe showing the search results (closed by default) --> +<div id="MSearchResultsWindow"> +<iframe src="javascript:void(0)" frameborder="0" + name="MSearchResults" id="MSearchResults"> +</iframe> +</div> + +<div class="header"> + <div class="summary"> +<a href="#define-members">Macros</a> </div> + <div class="headertitle"> +<div class="title">MCI Bus Data Width</div> </div> +<div class="ingroups"><a class="el" href="group__mci__control__gr.html">MCI Control Codes</a></div></div><!--header--> +<div class="contents"> + +<p>Specify the data bus width. +<a href="#details">More...</a></p> +<table class="memberdecls"> +<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a> +Macros</h2></td></tr> +<tr class="memitem:gaa09a00d810a4dfd1d1824311ee290585"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mci__bus__data__width__ctrls.html#gaa09a00d810a4dfd1d1824311ee290585">ARM_MCI_BUS_DATA_WIDTH_1</a>   (0x00)</td></tr> +<tr class="memdesc:gaa09a00d810a4dfd1d1824311ee290585"><td class="mdescLeft"> </td><td class="mdescRight">Bus data width: 1 bit (default) <a href="#gaa09a00d810a4dfd1d1824311ee290585"></a><br/></td></tr> +<tr class="separator:gaa09a00d810a4dfd1d1824311ee290585"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:gaa28150d8c3789e8cf1bcda318f74a28c"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mci__bus__data__width__ctrls.html#gaa28150d8c3789e8cf1bcda318f74a28c">ARM_MCI_BUS_DATA_WIDTH_4</a>   (0x01)</td></tr> +<tr class="memdesc:gaa28150d8c3789e8cf1bcda318f74a28c"><td class="mdescLeft"> </td><td class="mdescRight">Bus data width: 4 bits. <a href="#gaa28150d8c3789e8cf1bcda318f74a28c"></a><br/></td></tr> +<tr class="separator:gaa28150d8c3789e8cf1bcda318f74a28c"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mci__bus__data__width__ctrls.html#ga3bb99a2d98ba9fb8c5bc97fa2b8ef469">ARM_MCI_BUS_DATA_WIDTH_8</a>   (0x02)</td></tr> +<tr class="memdesc:ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"><td class="mdescLeft"> </td><td class="mdescRight">Bus data width: 8 bits. <a href="#ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"></a><br/></td></tr> +<tr class="separator:ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:gaccb174bd131f8fd8cd9a56439a8ebb60"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mci__bus__data__width__ctrls.html#gaccb174bd131f8fd8cd9a56439a8ebb60">ARM_MCI_BUS_DATA_WIDTH_4_DDR</a>   (0x03)</td></tr> +<tr class="memdesc:gaccb174bd131f8fd8cd9a56439a8ebb60"><td class="mdescLeft"> </td><td class="mdescRight">Bus data width: 4 bits, DDR (Dual Data Rate) - MMC only. <a href="#gaccb174bd131f8fd8cd9a56439a8ebb60"></a><br/></td></tr> +<tr class="separator:gaccb174bd131f8fd8cd9a56439a8ebb60"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga7b31f81ae703229095fe9efcfbe80b47"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__mci__bus__data__width__ctrls.html#ga7b31f81ae703229095fe9efcfbe80b47">ARM_MCI_BUS_DATA_WIDTH_8_DDR</a>   (0x04)</td></tr> +<tr class="memdesc:ga7b31f81ae703229095fe9efcfbe80b47"><td class="mdescLeft"> </td><td class="mdescRight">Bus data width: 8 bits, DDR (Dual Data Rate) - MMC only. <a href="#ga7b31f81ae703229095fe9efcfbe80b47"></a><br/></td></tr> +<tr class="separator:ga7b31f81ae703229095fe9efcfbe80b47"><td class="memSeparator" colspan="2"> </td></tr> +</table> +<a name="details" id="details"></a><h2 class="groupheader">Description</h2> +<p>Specify the data bus width. </p> +<p>The function <a class="el" href="group__mci__interface__gr.html#gaec0506a2aa4ae75cf6bc02528f36fe30">ARM_MCI_Control</a> with <em>control</em> = <a class="el" href="group__mci__mode__ctrls.html#ga876d964d0eeacdb16e93f7558a544587">ARM_MCI_BUS_DATA_WIDTH</a> specifies with <em>arg</em> the number of data I/O pins on the SD/MMC interface.</p> +<p>For high-speed memory cards, a 4-bit bus data width should be used (or 8-bit for eMMC). The data fields <em>data_width_4</em> and <em>data_width_8</em> of the structure <a class="el" href="group__mci__interface__gr.html#struct_a_r_m___m_c_i___c_a_p_a_b_i_l_i_t_i_e_s" title="MCI Driver Capabilities.">ARM_MCI_CAPABILITIES</a> encode whether the driver supports a specific bus data with.</p> +<p>The following codes are defined: </p> +<h2 class="groupheader">Macro Definition Documentation</h2> +<a class="anchor" id="gaa09a00d810a4dfd1d1824311ee290585"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_1   (0x00)</td> + </tr> + </table> +</div><div class="memdoc"> + +<p>Bus data width: 1 bit (default) </p> + +</div> +</div> +<a class="anchor" id="gaa28150d8c3789e8cf1bcda318f74a28c"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_4   (0x01)</td> + </tr> + </table> +</div><div class="memdoc"> + +<p>Bus data width: 4 bits. </p> + +</div> +</div> +<a class="anchor" id="ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_8   (0x02)</td> + </tr> + </table> +</div><div class="memdoc"> + +<p>Bus data width: 8 bits. </p> + +</div> +</div> +<a class="anchor" id="gaccb174bd131f8fd8cd9a56439a8ebb60"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_4_DDR   (0x03)</td> + </tr> + </table> +</div><div class="memdoc"> + +<p>Bus data width: 4 bits, DDR (Dual Data Rate) - MMC only. </p> + +</div> +</div> +<a class="anchor" id="ga7b31f81ae703229095fe9efcfbe80b47"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_8_DDR   (0x04)</td> + </tr> + </table> +</div><div class="memdoc"> + +<p>Bus data width: 8 bits, DDR (Dual Data Rate) - MMC only. </p> + +</div> +</div> +</div><!-- contents --> +</div><!-- doc-content --> +<!-- start footer part --> +<div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> + <ul> + <li class="footer">Generated on Tue Oct 27 2015 14:35:25 for CMSIS-Driver by ARM Ltd. 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