61291634c4a8fb3e227404">DAP_PACKET_SIZE</a>.</p>
<dl class="section note"><dt>Note</dt><dd>Commands that are not implemented reply with 0xFF instead of repeating the command byte.</dd></dl>
<h2>Conventions and Command Structure </h2>
<p>The following conventions describe the command semantic used in the following documentation:</p>
<table class="doxtable">
<tr>
<th>Symbol </th><th>Description  </th></tr>
<tr>
<td>&gt; </td><td>Prefix indicating the direction: Command from host to Debug Unit. </td></tr>
<tr>