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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/spienc/spi-enc-architecture.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">模块架构</h1>
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<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 class="- topic/p p" data-ofbid="d204429e33__20250123155223"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="spi_enc_architecture__image_jcd_myx_21c" src="../../../images/spienc/spienc_arch.png" alt="spienc_arch"/></div><br/></div>
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<p class="- topic/p p" data-ofbid="d204429e40__20250123155223">文件系统或者应用程序通过 MTD 层访问 SPI NOR / SPI NAND 设备的数据，SPI NOR / SPI NAND 驱动在通过 SPI 总线传输数据。</p>
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<p class="- topic/p p" data-ofbid="d204429e43__20250123155223">在 SPI NOR / SPI NAND 驱动通过 SPI 总线访问相关数据时，其实需要发送一系列的命令来进行数据的读写。 这个过程中，命令通信的数据，包括一些读写 SPI
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NOR / SPI NAND 的寄存器数据都不能加密， 仅存储数据部分需要进行加密处理。因此，虽然 SPI_ENC 是在硬件总线上对数据进行加密， 但是软件使用时需要在 SPI
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NOR / SPI NAND 驱动 根据需要，提供必要的加解密信息（数据地址和长度）， 并且启动相应的数据传输加解密。</p>
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<p class="- topic/p p" data-ofbid="d204429e46__20250123155223">因此在软件层次上，SPI NOR / SPI NAND 驱动依赖 SPI 驱动以及 SPI_ENC 驱动，而 SPI 驱动与 SPI_ENC 驱动是并列关系。</p>
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