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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/spienc/enc_introduction.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">SPI ENC 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="d120416e19__20250121171558">SPI_ENC 是一个对 SPI 总线上的数据进行在线加密和解密的模块。 使用该模块，可实现对 CPU 透明的 SPI 数据加密存储，即 CPU 对 SPI
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存储设备的读写数据都是明文， 但存储在 SPI 设备上的数据是密文，数据的加密和解密操作在 SPI 总线数据传输过程中完成。</p><div class="table-container"><table class="- topic/table table frame-all" id="id__table_qtg_pc3_bdc" data-ofbid="id__table_qtg_pc3_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">术语定义</span></caption><colgroup><col/><col/><col/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_qtg_pc3_bdc__entry__1">术语</th><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_qtg_pc3_bdc__entry__2">定义</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_qtg_pc3_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_qtg_pc3_bdc__entry__1">AES</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__2">Advanced Encryption Standard</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__3">一种对称分组密钥算法</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__1">ECB</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__2">Electronic Code Book</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__3">电子密码本模式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__1">CTR</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__2">Counter</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__3">计数器模式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__1">SPI</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__2">Serial Peripheral Interface</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_qtg_pc3_bdc__entry__3">串行外设接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_qtg_pc3_bdc__entry__1">BROM</td><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_qtg_pc3_bdc__entry__2">Boot ROM</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_qtg_pc3_bdc__entry__3">固化在芯片中的启动程序</td></tr></tbody></table></div><section class="- topic/section section" id="id__id3" data-ofbid="id__id3"><h2 class="- topic/title title sectiontitle">模块特性</h2>
|
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|
||
|
||
<p class="- topic/p p" data-ofbid="d120416e77__20250121171558">SPI_ENC 具备下列功能特性：</p>
|
||
<ul class="- topic/ul ul simple" id="id__ul_stg_pc3_bdc" data-ofbid="id__ul_stg_pc3_bdc"><li class="- topic/li li" data-ofbid="d120416e81__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e83__20250121171558">使用 AES-128-CTR 加密和解密</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e86__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e88__20250121171558">可通过配置连接到不同的 SPI 控制器</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e91__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e93__20250121171558">可通过 eFuse 配置密钥</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e96__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e98__20250121171558">支持明文和密文混合传输</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e101__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e103__20250121171558">不影响 SPI 总线传输带宽</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e106__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e108__20250121171558">不支持 SPI 全双工模式</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e111__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e113__20250121171558">使用所连接的 SPI 控制器的 HCLK</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e116__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e118__20250121171558">内置 64 字节分组密钥 Buffer</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e121__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e123__20250121171558">支持空 Page 检测</p>
|
||
</li></ul>
|
||
<p class="- topic/p p" data-ofbid="d120416e127__20250121171558">用途：</p>
|
||
<ul class="- topic/ul ul simple" id="id__ul_utg_pc3_bdc" data-ofbid="id__ul_utg_pc3_bdc"><li class="- topic/li li" data-ofbid="d120416e131__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e133__20250121171558">可用于实现 SPI NAND / SPI NOR 的全盘加密</p>
|
||
</li><li class="- topic/li li" data-ofbid="d120416e136__20250121171558">
|
||
<p class="- topic/p p" data-ofbid="d120416e138__20250121171558">SPI NAND / SPI NOR 上的固件防拷贝</p>
|
||
</li></ul>
|
||
</section><section class="- topic/section section" id="id__id4" data-ofbid="id__id4"><h2 class="- topic/title title sectiontitle">原理框图</h2>
|
||
|
||
<figure class="- topic/fig fig fignone" id="id__id5" data-ofbid="id__id5"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_vtg_pc3_bdc" src="../../../images/memory/spienc_block_diagram1.png" alt="spienc_block_diagram1"/></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">SPI ENC 原理框图</span></figcaption></figure>
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