</p>
<p>For high-speed memory cards, a 4-bit bus data width should be used (or 8-bit for eMMC). The bitfields <a class="el" href="group__mci__interface__gr.html#a950669a8c88b49c8da4c56163b45a79d" title="Supports 4-bit data.">ARM_MCI_CAPABILITIES.data_width_4</a> and <a class="el" href="group__mci__interface__gr.html#a808703d6c70a501464e156e55f5cabd2" title="Supports 8-bit data.">ARM_MCI_CAPABILITIES.data_width_8</a> encode whether the driver supports a specific bus data with.</p>
<p>The following codes are 