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<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta name="description" content="Audio Codec 模块内置 Sigma-Delta ADC、 DMIC 接口和 PWM 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。 特性说明 支持 1x 模拟音频输入 1x ADC，支持 16-bit 精度，采样率 8 KHz~48 KHz 支持数字 DMIC 立体声音频输入 无 DAC 设计，采用 PWM 输出 支持 2x 单端输出（立体声输出），或 1x ..."/><meta name="DC.rights.owner" content="(C) 版权 2025"/><meta name="copyright" content="(C) 版权 2025"/><meta name="generator" content="DITA-OT"/><meta name="DC.type" content="concept"/><meta name="DC.relation" content="../../../topics/revinfo/revinfo_rtos.html"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-01-15"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="audio"/><meta name="DC.language" content="zh-CN"/><title>Audio</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content=""/><meta name="wh-source-relpath" content="topics/ic/audio/audio-overview.dita"/><meta name="wh-out-relpath" content="topics/ic/audio/audio-overview.html"/>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/ic/audio/audio-overview.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">Audio</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><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><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"><li class="- topic/li li" data-ofbid="d262680e39__20250121171725">支持 1x 模拟音频输入</li><li class="- topic/li li" data-ofbid="d262680e45__20250121171725">1x ADC，支持 16-bit 精度，采样率 8 KHz~48 KHz</li><li class="- topic/li li" data-ofbid="d262680e51__20250121171725">支持数字 DMIC 立体声音频输入</li><li class="- topic/li li" data-ofbid="d262680e53__20250121171725">无 DAC 设计，采用 PWM 输出</li><li class="- topic/li li" data-ofbid="d262680e55__20250121171725">支持 2x 单端输出（立体声输出），或 1x 差分输出（单声道输出）</li><li class="- topic/li li" data-ofbid="d262680e57__20250121171725">输入输出通路均支持数字音量控制</li><li class="- topic/li li" data-ofbid="d262680e59__20250121171725">
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<p class="- topic/p p" data-ofbid="d262680e63__20250121171725">提供 128 x 32-bit FIFO 用于 ADC 通路的数据</p>
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</li><li class="- topic/li li" data-ofbid="d262680e68__20250121171725">提供 128 x 32-bit FIFO 用于 DMIC 通路的数据</li><li class="- topic/li li" data-ofbid="d262680e70__20250121171725">提供 128 x 32-bit FIFO 用于 Playback 通路的数据</li><li class="- topic/li li" data-ofbid="d262680e72__20250121171725">支持 CPU 和 DMA 两种数据传输实现方式</li></ul>
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</section><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"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="audio__image_n2f_xbc_zzb" width="672"/></div><br/><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="d262680e85__20250121171725"><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"><li class="- topic/li li" data-ofbid="d262680e91__20250121171725">ADC 通路：用于录音。</li><li class="- topic/li li" data-ofbid="d262680e97__20250121171725">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><li class="- topic/li li" data-ofbid="d262680e103__20250121171725">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><li class="- topic/li li" data-ofbid="d262680e105__20250121171725">FIFO 数据：用于缓冲收发数据，接收即是录音，发送即是播放。</li></ul></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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