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→40 Pin interface pin description
<li><p>The following is the complete pin diagram of 40pin</p>
<p>[[File:cm4-img253.png]]</p></li>
<li><p>The table below is the picture of the left half of the complete > table above, so you can see it clearly</p>
<p>[[File:cm4-img254.png]]</p></li>
<li><p>The table below is the picture of the right half of the complete > table above, so you can see it clearly</p>
<p>[[File:cm4-img255.png]]</p></li></ol>
</li>
<li><p>There are a total of '''<span style="color:#FF0000">28</span>''' GPIO ports in the 40pin interface, and the voltage of all GPIO ports is '''<span style="color:#FF0000">3.3v</span>'''</p></li></ol>
<span id="how-to-install-wiringop"></span>
== How to install wiringOP ==