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href="../../../topics/sdk/psram/psram-faq.html" id="id-d5856e3495-link">常见问题</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="spi_nand_user_guide-d5856e3507" class="topicref" data-id="spi_nand_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action spi_nand_user_guide-d5856e3507-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/spinand/spi-nand-user-guide_2.html" id="spi_nand_user_guide-d5856e3507-link">SPI NAND 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e3591" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e3591-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/spinor/spinor_user_guide_lite.html" id="id-d5856e3591-link">SPI NOR 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_mcc_32s_nbc-d5856e3639" class="topicref" data-id="concept_mcc_32s_nbc" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_mcc_32s_nbc-d5856e3639-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html" id="concept_mcc_32s_nbc-d5856e3639-link">多媒体</a><div class="wh-tooltip"><p class="shortdesc">GE、VE、Display、DVP、MPP、MPP 播放器等多媒体模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_nww_hzh_pzb-d5856e4868" class="topicref" data-id="concept_nww_hzh_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_nww_hzh_pzb-d5856e4868-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html" id="concept_nww_hzh_pzb-d5856e4868-link">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN<span class="ph">、CAP</span>、CIR、GPAI、GPIO、I2C、PSADC、PWM 等接口模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d5856e6083" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d5856e6083-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d5856e6083-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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/psram/psram-user-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">PSRAM 使用指南</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 body"><p class="- topic/p p" data-ofbid="d196429e19__20250121171632">本文档定义了 XSPI 模块，本模块的功能主要实现了外部并行总线 Xccela、HyperBus、OPI、1/2/4/8 线 SPI。 本总线模块可用于与外部
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PSRAM、FLASH 等元器件实现连接。</p><section class="- topic/section section" id="id__id2" data-ofbid="id__id2"><h2 class="- topic/title title sectiontitle">术语定义</h2>
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<div class="table-container"><table class="- topic/table table frame-all" id="id__table_jnv_fyh_bdc" data-ofbid="id__table_jnv_fyh_bdc" 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"></span></caption><colgroup><col style="width:19.801980198019802%"/><col style="width:35.84158415841584%"/><col style="width:44.35643564356436%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_jnv_fyh_bdc__entry__1">术语</th><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_jnv_fyh_bdc__entry__2">定义</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_jnv_fyh_bdc__entry__3">注释说明</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">XSPI</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">Expanded Serial Peripheral Interface</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">扩展的串行外设接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">SPI</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">Serial Peripheral Interface</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">标准串行外设接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">DUAL SPI</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">Dual Serial Peripheral Interface</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">2 线 data 传输，串行外设接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">QUAD SPI</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">Quad Serial Peripheral Interface</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">4 线 data 传输，串行外设接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">OCTAL SPI</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">Octal Serial Peripheral Interface</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">8 线 data 传输，串行外设接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">OPI</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">Octal Peripheral Interface</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">8 线 cmd, addr, data 传输，串行外设接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">HyperBus</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">High Performance Serial Bus Interface</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">高性能串行总线接口技术</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">Xccela</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">High speed, high performance octal spi bus</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">高速，高性能的 8 线 data 的串行外设接口总线</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__1">DDR</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__2">Double data rate</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_jnv_fyh_bdc__entry__3">双数据率，双边沿采样模式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_jnv_fyh_bdc__entry__1">SDR</td><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_jnv_fyh_bdc__entry__2">Single data rate</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_jnv_fyh_bdc__entry__3">单数据率，单边沿采样模式</td></tr></tbody></table></div>
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</section><section class="- topic/section section" id="id__id4" data-ofbid="id__id4"><h2 class="- topic/title title sectiontitle">功能特性</h2>
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<ul class="- topic/ul ul simple" id="id__ul_knv_fyh_bdc" data-ofbid="id__ul_knv_fyh_bdc"><li class="- topic/li li" data-ofbid="d196429e119__20250121171632">
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<p class="- topic/p p" data-ofbid="d196429e121__20250121171632">支持 Xccela 协议</p>
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</li><li class="- topic/li li" data-ofbid="d196429e124__20250121171632">
|
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<p class="- topic/p p" data-ofbid="d196429e126__20250121171632">支持 HyperBus 协议</p>
|
||
</li><li class="- topic/li li" data-ofbid="d196429e129__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e131__20250121171632">支持 OPI 协议</p>
|
||
</li><li class="- topic/li li" data-ofbid="d196429e134__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e136__20250121171632">支持 1/2/4/8 线 SPI</p>
|
||
</li><li class="- topic/li li" data-ofbid="d196429e139__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e141__20250121171632">支持 200MHz DDR/SDR 采样</p>
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</li><li class="- topic/li li" data-ofbid="d196429e144__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e146__20250121171632">支持 XIP</p>
|
||
</li><li class="- topic/li li" data-ofbid="d196429e149__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e151__20250121171632">支持中断以及 DMA</p>
|
||
</li><li class="- topic/li li" data-ofbid="d196429e154__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e156__20250121171632">支持两片并行读写数据</p>
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</li><li class="- topic/li li" data-ofbid="d196429e159__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e161__20250121171632">支持单片 16bit 读写数据</p>
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||
</li><li class="- topic/li li" data-ofbid="d196429e164__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e166__20250121171632">具有 16x32bit TXFIFO 以及 RXFIFO</p>
|
||
</li><li class="- topic/li li" data-ofbid="d196429e169__20250121171632">
|
||
<p class="- topic/p p" data-ofbid="d196429e171__20250121171632">具有 512MB 内存映射空间</p>
|
||
</li></ul>
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</section><section class="- topic/section section" id="id__id5" data-ofbid="id__id5"><h2 class="- topic/title title sectiontitle">原理框图</h2>
|
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<figure class="- topic/fig fig fignone" id="id__id6" data-ofbid="id__id6"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_lnv_fyh_bdc" src="../../../images/psram/xspi_block.PNG" width="576" alt="xspi_block"/></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">xspi_block</span></figcaption></figure>
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</section><section class="- topic/section section" id="id__d13x" data-ofbid="id__d13x"><h2 class="- topic/title title sectiontitle">D13x 方案</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d196429e196__20250121171632"> 实现 OPI 方式与 PSRAM 通信，采用双边沿采样，支持 parallel(两片 PSRAM)/single（一片 PSRAM）驱动 PSRAM。</p>
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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="#id__id2" data-tocid="id__id2">术语定义</a></div></li><li class="section-item"><div class="section-title"><a href="#id__id4" data-tocid="id__id4">功能特性</a></div></li><li class="section-item"><div class="section-title"><a href="#id__id5" data-tocid="id__id5">原理框图</a></div></li><li class="section-item"><div class="section-title"><a href="#id__d13x" data-tocid="id__d13x">D13x 方案</a></div></li></ul></div>
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