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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/sdk/cmu/cmu-introduction.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">CMU 使用指南</h1><div class="date inPage">25 Nov 2024</div><div style="color: gray;"></div><div class="- topic/body concept/conbody body conbody"><p class="- topic/p p" data-ofbid="d220446e22__20250121171646">CMU 模块用于配置系统时钟、PLL 时钟频率和展频、AXI/ AHB/ APB 总线时钟、各模块输入时钟、IO 输出时钟，以及各个模块的 Reset 信号的复位或释放。</p><div class="table-container"><table class="- topic/table table frame-all" id="cmu__table_ldr_zpw_bzb" data-ofbid="cmu__table_ldr_zpw_bzb" data-cols="3"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">术语定义</span></caption><colgroup><col style="width:33.33333333333333%"/><col style="width:33.33333333333333%"/><col style="width:33.33333333333333%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-0 rowsep-0" id="cmu__table_ldr_zpw_bzb__entry__1">术语</th><th class="- topic/entry entry colsep-0 rowsep-0" id="cmu__table_ldr_zpw_bzb__entry__2">定义</th><th class="- topic/entry entry colsep-0 rowsep-0" id="cmu__table_ldr_zpw_bzb__entry__3">注释说明</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-0 rowsep-0" headers="cmu__table_ldr_zpw_bzb__entry__1">CMU</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="cmu__table_ldr_zpw_bzb__entry__2">clock manage unit</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="cmu__table_ldr_zpw_bzb__entry__3">时钟管理单元</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-0 rowsep-0" headers="cmu__table_ldr_zpw_bzb__entry__1">PLL</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="cmu__table_ldr_zpw_bzb__entry__2">Phase Locked Loop</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="cmu__table_ldr_zpw_bzb__entry__3">锁相环时钟</td></tr></tbody></table></div><div class="- topic/div div section" id="cmu__id3">
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<p class="- topic/p p" data-ofbid="d220446e56__20250121171646">CMU 模块的基本特性如下：</p>
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<ul class="- topic/ul ul simple" id="cmu__ul_mg4_5hd_bdc" data-ofbid="cmu__ul_mg4_5hd_bdc"><li class="- topic/li li" data-ofbid="d220446e60__20250121171646">
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<p class="- topic/p p" data-ofbid="d220446e62__20250121171646">两种锁相环共五个 PLL</p>
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</li><li class="- topic/li li" data-ofbid="d220446e65__20250121171646">
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<p class="- topic/p p" data-ofbid="d220446e67__20250121171646">两个整数 PLL 时钟 PLL_INT，无小数分频和展频功能，可旁路输出 24M 时钟</p>
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</li><li class="- topic/li li" data-ofbid="d220446e70__20250121171646">
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<p class="- topic/p p" data-ofbid="d220446e72__20250121171646">三个小数 PLL 时钟 PLL_FRA，有小数分频和展频功能，可旁路输出 24M 时钟</p>
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</li><li class="- topic/li li" data-ofbid="d220446e75__20250121171646">
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<p class="- topic/p p" data-ofbid="d220446e77__20250121171646">CPU 时钟源可选 CLK_24M、CLK_32K、PLL_INT0，可进行 1~32 分频</p>
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</li><li class="- topic/li li" data-ofbid="d220446e80__20250121171646">
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<p class="- topic/p p" data-ofbid="d220446e82__20250121171646">AXI/ AHB0/ APB0/ APB1 时钟源可选 CLK_24M 或 PLL_INT1，可进行 1~32 分频</p>
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</li><li class="- topic/li li" data-ofbid="d220446e85__20250121171646">
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<p class="- topic/p p" data-ofbid="d220446e87__20250121171646">每个模块的时钟可进行 1~32 分频</p>
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</li><li class="- topic/li li" data-ofbid="d220446e90__20250121171646">
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<p class="- topic/p p" data-ofbid="d220446e92__20250121171646">每个模块的总线时钟、模块时钟、复位开关可独立配置</p>
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</li><li class="- topic/li li" data-ofbid="d220446e95__20250121171646">
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<p class="- topic/p p" data-ofbid="d220446e97__20250121171646">四路可配置频率和时钟源的时钟输出，用作于外设的时钟输入</p>
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