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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/spienc/spi-enc-user-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">SPI ENC</h1><div class="date inPage">7 Jun 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" data-ofbid="d148223e22__20250121171610">Serial Peripheral Interface Encryption (SPI ENC) 模块用于对 SPI
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总线上的数据进行在线加密和解密，实现对 CPU 透明的 SPI 数据加密存储。即 CPU 对 SPI 存储设备的读写数据是明文，但存储在 SPI
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设备上的数据是密文，数据的加密和解密操作在数据传输过程中完成。</p><p class="- topic/p p" data-ofbid="d148223e24__20250121171610">SPI ENC 用于 SPI 存储设备，即 SPI NOR/ SPI NAND，需要配合 SPI 控制器使用。</p><ul class="- topic/ul ul" id="spi_enc_user_guide__ul_ij1_1rx_21c" data-ofbid="spi_enc_user_guide__ul_ij1_1rx_21c"><li class="- topic/li li" data-ofbid="d148223e27__20250121171610">支持 AES-128-CTR 加密和解密</li><li class="- topic/li li" data-ofbid="d148223e29__20250121171610">通过配置连接到不同的 SPI 控制器</li><li class="- topic/li li" data-ofbid="d148223e35__20250121171610">通过 eFuse 配置密钥</li><li class="- topic/li li" data-ofbid="d148223e37__20250121171610">支持明文和密文混合传输</li><li class="- topic/li li" data-ofbid="d148223e39__20250121171610">不影响 SPI 总线传输带宽</li><li class="- topic/li li" data-ofbid="d148223e41__20250121171610">不支持 SPI 全双工模式</li><li class="- topic/li li" data-ofbid="d148223e43__20250121171610">内置 64 字节分组密钥 Buffer</li><li class="- topic/li li" data-ofbid="d148223e45__20250121171610">支持全 0xFF 空页检测</li></ul><div class="- topic/p p" data-ofbid="d148223e47__20250121171610">用途：<ul class="- topic/ul ul" id="spi_enc_user_guide__ul_p3w_bxq_g1c" data-ofbid="spi_enc_user_guide__ul_p3w_bxq_g1c"><li class="- topic/li li" data-ofbid="d148223e50__20250121171610">
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<p class="- topic/p p" data-ofbid="d148223e52__20250121171610">可用于实现 SPI NAND / SPI NOR 的全盘加密</p>
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</li><li class="- topic/li li" data-ofbid="d148223e55__20250121171610">
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<p class="- topic/p p" data-ofbid="d148223e57__20250121171610">SPI NAND / SPI NOR 上的固件防拷贝</p>
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</li></ul></div><figure class="- topic/fig fig fignone" id="spi_enc_user_guide__fig_r1r_1rx_21c" data-ofbid="spi_enc_user_guide__fig_r1r_1rx_21c"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="spi_enc_user_guide__image_pqw_cxq_g1c" src="../../../images/spienc/spienc_block_diagram3.png" alt="spienc_block_diagram3"/></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></div></article></main></div>
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