描述
<p><strong>第一阶段:语音控制音乐播放器。第二阶段:在第一阶段上加功放。第三阶段:尝试播放网络音乐。等</strong></p>
<p><br>
<strong>1.金振的选择 <img src="//image.lceda.cn/pullimage/crjqOD8cPV5Q2XrOHA9miUQVH6rurU8ZE5bwTUA3.png" alt=""></strong></p>
<p><strong>2.电源的选择</strong></p>
<p><span class="colour" style="color:rgba(0,0,0,.87);"><strong>CI1103需要3.3V和1.2V两组电压,可选择直接外部输入,也可通过电压转换。且****CI1103有上电时序要求,即1.2V上电需比3.3V上电延迟至少0.1ms。</strong></span>
<strong><img src="//image.lceda.cn/pullimage/gJUkfdAC43pwxQZknRRyJZxUm6TzMMO9HYo4G2cg.png" alt="image.png"></strong>
<strong><img src="//image.lceda.cn/pullimage/9uaJuwkheKPhlQkQagBwYU720rEfMhFzqmSAAjLm.png" alt="image.png"></strong></p>
<p><strong>RY3408引脚图</strong>
<strong><img src="//image.lceda.cn/pullimage/LAsOMFGEZNJPygPLKTE53SMd2BfGgFQs4h8kJh4N.png" alt="image.png"></strong></p>
<p><strong>3.部分滤波电路</strong>
<strong><img src="//image.lceda.cn/pullimage/m9s7wpu9LviXllr5waK4AbSVwfn4tEmde5qjO5qX.png" alt="image.png"></strong></p>
<p><strong>4.</strong><span class="colour" style="color:rgba(0,0,0,.87);"><strong>模拟地和数字地的分割</strong></span>
<span class="colour" style="color:rgba(0,0,0,.87);"><strong><img src="//image.lceda.cn/pullimage/TcoUg2l2jwploh1yGvcCYnsnKVjFvUkB2zJf80mH.png" alt="image.png"></strong></span></p>
<p><span class="colour" style="color:rgba(0,0,0,.87);"><strong>5.时钟电路</strong></span>
<span class="colour" style="color:rgba(0,0,0,.87);"><strong><img src="//image.lceda.cn/pullimage/2KKnSv5ZPq2m8D8bcRngt5tfaXu724ML5eBQAyJj.png" alt="image.png"></strong></span>
** (温馨提示:更具官网给的参考使用的12.288MHz,如果没有可以采用16MHz其频率对MCU印象不是太大,如果你只想用它的串口建议改成12.288MHz,本方案是采用16MHz)**</p>
<p><br>
<strong>6.麦克风输入电路(温馨提示:建议以下几个厂家)</strong>
<strong><img src="//image.lceda.cn/pullimage/TkkxWyPYNKDqr4kYSwlWroQ9WR6EzK42sSA0YJAX.png" alt="image.png"></strong>
** 麦克风购买厂家**</p>
<p><br><span class="colour" style="color:rgba(0,0,0,.87);"><strong>在麦克风输入口增加ESD保护器件可提升防静电等级。</strong></span></p>
<p><br><br>
<strong><img src="//image.lceda.cn/pullimage/s3BYnvBvBgpdEjzYlW02QBzRQ6YvqCjIMOypkbri.png" alt="image.png"></strong></p>
<p><strong>7.功放电路 (温馨提示:扬声器请更具官方给出的表采购)</strong></p>
<p><span class="colour" style="color:rgba(0,0,0,.87);"><strong>功放芯片使能引脚选用GPIO[34]进行控制,功放上电默认关闭,播音开启。根据功放逻辑预留上拉电阻10K确保初始逻辑状态正确。功放输出增加ESD保护器件,可提升防静电等级。功放供电采用5V,加大电容4.7uF稳压。</strong></span></p>
<p><strong><img src="//image.lceda.cn/pullimage/ryJKt7QKweAwSvwL1TLvqQlL2DCnyNegXdORInHu.png" alt="image.png"></strong></p>
<p><strong>8.芯片上电模式的选着</strong></p>
<p><span class="colour" style="color:rgba(0,0,0,.87);"><strong>CI1103上电时管脚IIS1_MCLK的电平会作为升级模式判断信号,当上电判断为高时,启动串口升级服务,可使用配套的升级工具对板上的Nor Flash进行编程。上电判断为低时直接从板上的Nor Flash启动。</strong></span>
<strong><img src="//image.lceda.cn/pullimage/PYyQAm4KLmfpyv3OeDpO17OVoAFALLHxiXZjojvU.png" alt="image.png"></strong></p>
<p><br>
<strong>9.引脚控制程序</strong></p>
<p><strong>10.PWM控制程序</strong></p>
<p><strong>11.</strong><span class="colour" style="color:rgba(0,0,0,.87);"><strong>UART控制程序(等)</strong></span>
<span class="colour" style="color:rgba(0,0,0,.87);"></span></p>
<p><br><br></p>
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