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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://aicdocco/taskstopics/ic/audio/audio-overview.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">Audio</h1>
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<div class="date inPage">9 Apr 2025</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div>
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<div class="- topic/body concept/conbody body conbody">
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<p class="- topic/p p" id="audio__p_vyd_1cy_nzb" data-ofbid="audio__p_vyd_1cy_nzb">Audio Codec 模块内置
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<span class="- topic/ph ph">Sigma-Delta ADC、</span> DMIC 接口和 PWM
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音频输出模块，经过数字信号的处理，实现音频信号的录入以及播放功能。</p>
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<section class="- topic/section section" id="audio__section_qp2_lwq_nzb" data-ofbid="audio__section_qp2_lwq_nzb"><h2 class="- topic/title title sectiontitle">特性说明</h2>
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<ul class="- topic/ul ul" id="audio__ul_rp2_lwq_nzb" data-ofbid="audio__ul_rp2_lwq_nzb">
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<li class="- topic/li li" data-ofbid="d119189e46__20250409171044">支持 1x 模拟音频输入</li>
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<li class="- topic/li li" data-ofbid="d119189e49__20250409171044">1x ADC，支持 16-bit 精度，采样率 8 KHz~48 KHz</li>
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<li class="- topic/li li" data-ofbid="d119189e52__20250409171044">支持数字 DMIC 立体声音频输入</li>
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<li class="- topic/li li" data-ofbid="d119189e55__20250409171044">无 DAC 设计，采用 PWM 输出</li>
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<li class="- topic/li li" data-ofbid="d119189e58__20250409171044">支持 2x 单端输出（立体声输出），或 1x 差分输出（单声道输出）</li>
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<li class="- topic/li li" data-ofbid="d119189e62__20250409171044">输入输出通路均支持数字音量控制</li>
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<li class="- topic/li li" data-ofbid="d119189e65__20250409171044">
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<p class="- topic/p p" data-ofbid="d119189e67__20250409171044">提供 128 x 32-bit FIFO 用于 ADC 通路的数据</p>
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</li>
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<li class="- topic/li li" data-ofbid="d119189e71__20250409171044">提供 128 x 32-bit FIFO 用于 DMIC 通路的数据</li>
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<li class="- topic/li li" data-ofbid="d119189e74__20250409171044">提供 128 x 32-bit FIFO 用于 Playback 通路的数据</li>
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<li class="- topic/li li" data-ofbid="d119189e77__20250409171044">支持 CPU 和 DMA 两种数据传输实现方式</li>
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</ul>
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</section>
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<section class="- topic/section section" id="audio__section_sp2_lwq_nzb" data-ofbid="audio__section_sp2_lwq_nzb"><h2 class="- topic/title title sectiontitle">原理框图</h2>
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<figure class="- topic/fig fig fignone" id="audio__fig_d5k_ywq_nzb" data-ofbid="audio__fig_d5k_ywq_nzb">
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<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="audio__image_n2f_xbc_zzb" width="672"/></div><br/>
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<figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">原理框图</span></figcaption></figure>
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<div class="- topic/p p" data-ofbid="d119189e95__20250409171044"><a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="audio-overview.html#audio__fig_d5k_ywq_nzb">原理框图</a>中列出的组成部分包括：<ul class="- topic/ul ul" id="audio__ul_pt4_y1y_nzb" data-ofbid="audio__ul_pt4_y1y_nzb">
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<li class="- topic/li li" data-ofbid="d119189e102__20250409171044">ADC 通路：用于录音。</li>
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<li class="- topic/li li" data-ofbid="d119189e105__20250409171044">DMIC 通路：用于录音。其中 DMIC Interface 模块用于分离 DMIC
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的立体声数据，从而进行左右声道的数字处理。</li>
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<li class="- topic/li li" data-ofbid="d119189e108__20250409171044">Playback 通路：用于播放。其中 Audio Switch 模块用于选择 DSPK0 和 DSPK1 的数据源。</li>
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<li class="- topic/li li" data-ofbid="d119189e111__20250409171044">FIFO 数据：用于缓冲收发数据，接收即是录音，发送即是播放。</li>
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</ul></div>
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</section>
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</article></main></div>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#audio__section_qp2_lwq_nzb" data-tocid="audio__section_qp2_lwq_nzb">特性说明</a></div></li><li class="section-item"><div class="section-title"><a href="#audio__section_sp2_lwq_nzb" data-tocid="audio__section_sp2_lwq_nzb">原理框图</a></div></li></ul></div>
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</div>
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</footer>
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<div id="go2top" class="d-print-none">
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<span class="oxy-icon oxy-icon-up"></span>
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</div>
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<div id="modal_img_large" class="modal">
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<span class="close oxy-icon oxy-icon-remove"></span>
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<div id="modal_img_container"></div>
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<div id="caption"></div>
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</div>
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<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
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</body>
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</html>
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