r">__AVR_ATmega1280__</span><span class="preprocessor">)</span> <span class="preprocessor">||</span> <span class="preprocessor">defined</span><span class="preprocessor">(</span><span class="preprocessor">__AVR_ATmega2560__</span><span class="preprocessor">)</span></div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    <span class="keywordflow">if</span> (pin &gt;= 54) pin -= 54; <span class="comment">// allow for channel or pin numbers</span></div><div class="line"><a name="l