td>busy</td>
        <td>output</td>
        <td align="center">1</td>
        <td>A signal that indicates that the transmitter is currently in operation and it can't transmit new data.</td>
    </tr>
</table>
<h4 id="serializer">Serializer</h4>
<p>It produces serial bits from the parallel data (from LSB to MSB) according to the input index.</p>
<h5 id="port-description">Port Description</h5>
<table>
    <tr>
        <th align="left">Port</th>
        <th>Direction</th>
        <th>Width</th>
        <th>De