begriffs open source - cmsis/blob - dev/v6.0.0-dev53/Driver/html/group__mci__bus__data__width__ctrls.html

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 131 <a href="#define-members">Macros</a>  </div>
 132   <div class="headertitle"><div class="title">MCI Bus Data Width<div class="ingroups"><a class="el" href="group__mci__interface__gr.html">MCI Interface</a> &raquo; <a class="el" href="group__mci__control__gr.html">MCI Control Codes</a></div></div></div>
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 134 <div class="contents">
 135
 136 <p>Specify the data bus width.
 137 <a href="#details">More...</a></p>
 138 <table class="memberdecls">
 139 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="define-members" name="define-members"></a>
 140 Macros</h2></td></tr>
 141 <tr class="memitem:gaa09a00d810a4dfd1d1824311ee290585"><td class="memItemLeft" align="right" valign="top">#define&#160;</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>&#160;&#160;&#160;(0x00UL)</td></tr>
 142 <tr class="memdesc:gaa09a00d810a4dfd1d1824311ee290585"><td class="mdescLeft">&#160;</td><td class="mdescRight">Bus data width: 1 bit (default)  <br /></td></tr>
 143 <tr class="separator:gaa09a00d810a4dfd1d1824311ee290585"><td class="memSeparator" colspan="2">&#160;</td></tr>
 144 <tr class="memitem:gaa28150d8c3789e8cf1bcda318f74a28c"><td class="memItemLeft" align="right" valign="top">#define&#160;</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>&#160;&#160;&#160;(0x01UL)</td></tr>
 145 <tr class="memdesc:gaa28150d8c3789e8cf1bcda318f74a28c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Bus data width: 4 bits.  <br /></td></tr>
 146 <tr class="separator:gaa28150d8c3789e8cf1bcda318f74a28c"><td class="memSeparator" colspan="2">&#160;</td></tr>
 147 <tr class="memitem:ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"><td class="memItemLeft" align="right" valign="top">#define&#160;</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>&#160;&#160;&#160;(0x02UL)</td></tr>
 148 <tr class="memdesc:ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"><td class="mdescLeft">&#160;</td><td class="mdescRight">Bus data width: 8 bits.  <br /></td></tr>
 149 <tr class="separator:ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"><td class="memSeparator" colspan="2">&#160;</td></tr>
 150 <tr class="memitem:gaccb174bd131f8fd8cd9a56439a8ebb60"><td class="memItemLeft" align="right" valign="top">#define&#160;</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>&#160;&#160;&#160;(0x03UL)</td></tr>
 151 <tr class="memdesc:gaccb174bd131f8fd8cd9a56439a8ebb60"><td class="mdescLeft">&#160;</td><td class="mdescRight">Bus data width: 4 bits, DDR (Dual Data Rate) - MMC only.  <br /></td></tr>
 152 <tr class="separator:gaccb174bd131f8fd8cd9a56439a8ebb60"><td class="memSeparator" colspan="2">&#160;</td></tr>
 153 <tr class="memitem:ga7b31f81ae703229095fe9efcfbe80b47"><td class="memItemLeft" align="right" valign="top">#define&#160;</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>&#160;&#160;&#160;(0x04UL)</td></tr>
 154 <tr class="memdesc:ga7b31f81ae703229095fe9efcfbe80b47"><td class="mdescLeft">&#160;</td><td class="mdescRight">Bus data width: 8 bits, DDR (Dual Data Rate) - MMC only.  <br /></td></tr>
 155 <tr class="separator:ga7b31f81ae703229095fe9efcfbe80b47"><td class="memSeparator" colspan="2">&#160;</td></tr>
 156 </table>
 157 <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
 158 <p>Specify the data bus width. </p>
 159 <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>
 160 <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#structARM__MCI__CAPABILITIES" title="MCI Driver Capabilities.">ARM_MCI_CAPABILITIES</a> encode whether the driver supports a specific bus data with.</p>
 161 <p>The following codes are defined: </p>
 162 <h2 class="groupheader">Macro Definition Documentation</h2>
 163 <a id="gaa09a00d810a4dfd1d1824311ee290585" name="gaa09a00d810a4dfd1d1824311ee290585"></a>
 164 <h2 class="memtitle"><span class="permalink"><a href="#gaa09a00d810a4dfd1d1824311ee290585">&#9670;&#160;</a></span>ARM_MCI_BUS_DATA_WIDTH_1</h2>
 165
 166 <div class="memitem">
 167 <div class="memproto">
 168       <table class="memname">
 169         <tr>
 170           <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_1&#160;&#160;&#160;(0x00UL)</td>
 171         </tr>
 172       </table>
 173 </div><div class="memdoc">
 174
 175 <p>Bus data width: 1 bit (default) </p>
 176
 177 </div>
 178 </div>
 179 <a id="gaa28150d8c3789e8cf1bcda318f74a28c" name="gaa28150d8c3789e8cf1bcda318f74a28c"></a>
 180 <h2 class="memtitle"><span class="permalink"><a href="#gaa28150d8c3789e8cf1bcda318f74a28c">&#9670;&#160;</a></span>ARM_MCI_BUS_DATA_WIDTH_4</h2>
 181
 182 <div class="memitem">
 183 <div class="memproto">
 184       <table class="memname">
 185         <tr>
 186           <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_4&#160;&#160;&#160;(0x01UL)</td>
 187         </tr>
 188       </table>
 189 </div><div class="memdoc">
 190
 191 <p>Bus data width: 4 bits. </p>
 192
 193 </div>
 194 </div>
 195 <a id="ga3bb99a2d98ba9fb8c5bc97fa2b8ef469" name="ga3bb99a2d98ba9fb8c5bc97fa2b8ef469"></a>
 196 <h2 class="memtitle"><span class="permalink"><a href="#ga3bb99a2d98ba9fb8c5bc97fa2b8ef469">&#9670;&#160;</a></span>ARM_MCI_BUS_DATA_WIDTH_8</h2>
 197
 198 <div class="memitem">
 199 <div class="memproto">
 200       <table class="memname">
 201         <tr>
 202           <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_8&#160;&#160;&#160;(0x02UL)</td>
 203         </tr>
 204       </table>
 205 </div><div class="memdoc">
 206
 207 <p>Bus data width: 8 bits. </p>
 208
 209 </div>
 210 </div>
 211 <a id="gaccb174bd131f8fd8cd9a56439a8ebb60" name="gaccb174bd131f8fd8cd9a56439a8ebb60"></a>
 212 <h2 class="memtitle"><span class="permalink"><a href="#gaccb174bd131f8fd8cd9a56439a8ebb60">&#9670;&#160;</a></span>ARM_MCI_BUS_DATA_WIDTH_4_DDR</h2>
 213
 214 <div class="memitem">
 215 <div class="memproto">
 216       <table class="memname">
 217         <tr>
 218           <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_4_DDR&#160;&#160;&#160;(0x03UL)</td>
 219         </tr>
 220       </table>
 221 </div><div class="memdoc">
 222
 223 <p>Bus data width: 4 bits, DDR (Dual Data Rate) - MMC only. </p>
 224
 225 </div>
 226 </div>
 227 <a id="ga7b31f81ae703229095fe9efcfbe80b47" name="ga7b31f81ae703229095fe9efcfbe80b47"></a>
 228 <h2 class="memtitle"><span class="permalink"><a href="#ga7b31f81ae703229095fe9efcfbe80b47">&#9670;&#160;</a></span>ARM_MCI_BUS_DATA_WIDTH_8_DDR</h2>
 229
 230 <div class="memitem">
 231 <div class="memproto">
 232       <table class="memname">
 233         <tr>
 234           <td class="memname">#define ARM_MCI_BUS_DATA_WIDTH_8_DDR&#160;&#160;&#160;(0x04UL)</td>
 235         </tr>
 236       </table>
 237 </div><div class="memdoc">
 238
 239 <p>Bus data width: 8 bits, DDR (Dual Data Rate) - MMC only. </p>
 240
 241 </div>
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