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→40 Pin Expansion Interface Pin Instructions
<div class="figure">
::[[File:media/image302.jpeg|575x166px|5725d46c4ff256fbd1d42ed5ba883f9f]]
</div>
<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:media/image307.png|575x263px]]</p>
{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big><p>'''The pwm in the above table has marked the base address of the corresponding register, which is useful when checking which pwmchip in /sys/class/pwm/ corresponds to which pwm pin in the 40 pin header.'''</p></big>|}</li></ol>
</li>
<li><p>There are a total of '''<span style="color:#FF0000">28</span>''' GPIO ports in the 40 pin 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 ==
