le="box-sizing: border-box; padding: 6px 13px; border: 1px solid rgb(221, 221, 221);">SDIO mode (not used for Arduino)<br>
                </td>
           </tr>
       </tbody>
   </table>
   <p>Note: you don’t have to add an external pull-up resistor to GPIO2, the internal one is enabled at boot.</p>
   <p>We made sure that these conditions are met by adding external resistors in the previous chapter, or the board manufacturer of your board added them for you. This has some implications, however:</p>
  