urce</a></li><li class="chapter-item expanded "><a href="../chapter_5/5.2/5.2.5.html"><strong aria-hidden="true">5.2.5.</strong> RF and Antenna</a></li><li class="chapter-item expanded "><a href="../chapter_5/5.2/5.2.6.html"><strong aria-hidden="true">5.2.6.</strong> Strapping Pins</a></li><li class="chapter-item expanded "><a href="../chapter_5/5.2/5.2.7.html"><strong aria-hidden="true">5.2.7.</strong> GPIO and PWM Controller</a></li></ol></li><li class="chapter-item expanded "><a href="../chapter_5/5.3/in