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<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn" lang="zh-cn" data-whc_version="26.0">
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<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta name="description" content="芯片电路通常是生产时物理固化的电路，生产完成之后不可改变。实际应用中有一些重要信息，需要固化在芯片之中， 使得上电即可读取使用，比如一些硬件的性能参数信息。但是这些参数可能与芯片的生产工艺、所用的材料等有关系， 无法在设计时确定，因此需要有一种存储技术，即可以固化信息，又能够在生产之后进行修改。 eFuse 就是一种允许芯片上的电路在运行时进行修改的技术。它类似 ..."/><meta name="DC.rights.owner" content="(C) 版权 2025"/><meta name="copyright" content="(C) 版权 2025"/><meta name="generator" content="DITA-OT"/><meta name="DC.type" content="concept"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-12-09"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="efuse_user_guide"/><meta name="DC.language" content="zh-CN"/><title>eFuse 使用指南</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content=""/><meta name="wh-source-relpath" content="topics/sdk/efuse/efuse_user_guide.dita"/><meta name="wh-out-relpath" content="topics/sdk/efuse/efuse_user_guide.html"/>
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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/efuse/efuse_user_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">eFuse 使用指南</h1><div class="date inPage">9 Dec 2024</div><div style="color: gray;"></div><div class="- topic/body concept/conbody body conbody"><p class="- topic/p p" data-ofbid="d296106e22__20250121171801">芯片电路通常是生产时物理固化的电路，生产完成之后不可改变。实际应用中有一些重要信息，需要固化在芯片之中，
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使得上电即可读取使用，比如一些硬件的性能参数信息。但是这些参数可能与芯片的生产工艺、所用的材料等有关系，
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无法在设计时确定，因此需要有一种存储技术，即可以固化信息，又能够在生产之后进行修改。</p><p class="- topic/p p" data-ofbid="d296106e24__20250121171801">eFuse 就是一种允许芯片上的电路在运行时进行修改的技术。它类似 EEPROM，属于一次性可编程存储器。eFuse ROM 里初始存储的内容都是
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0，当需要修改某个比特位的值时，通过片上电压（通常为 2.5V）提供一个持续一定时长的直流脉冲， 将代表该比特位的单根熔丝烧断，使得该比特位变为
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1。熔丝被烧断之后，无法再恢复连接，因此这样的修改是一次性不可逆的。</p><div class="- topic/p p" data-ofbid="d296106e26__20250121171801">ArtInChip 芯片中使用 eFuse 保存的配置信息包括但不限于：<ul class="- topic/ul ul" id="efuse_user_guide__ul_x5b_fqy_21c" data-ofbid="efuse_user_guide__ul_x5b_fqy_21c"><li class="- topic/li li" data-ofbid="d296106e29__20250121171801">
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<p class="- topic/p p" data-ofbid="d296106e31__20250121171801">芯片 ID</p>
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</li><li class="- topic/li li" data-ofbid="d296106e34__20250121171801">
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<p class="- topic/p p" data-ofbid="d296106e36__20250121171801">校准参数</p>
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</li><li class="- topic/li li" data-ofbid="d296106e39__20250121171801">
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<p class="- topic/p p" data-ofbid="d296106e41__20250121171801">功能开关配置</p>
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</li><li class="- topic/li li" data-ofbid="d296106e44__20250121171801">
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<p class="- topic/p p" data-ofbid="d296106e46__20250121171801">密钥信息</p>
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</li></ul></div><p class="- topic/p p" data-ofbid="d296106e49__20250121171801">eFuse 内容通过 SID 硬件模块来访问。</p><div class="table-container"><table class="- topic/table table frame-all" id="efuse_user_guide__table_jvd_gqy_21c" data-ofbid="efuse_user_guide__table_jvd_gqy_21c" 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-1 rowsep-1" id="efuse_user_guide__table_jvd_gqy_21c__entry__1">术语</th><th class="- topic/entry entry colsep-1 rowsep-1" id="efuse_user_guide__table_jvd_gqy_21c__entry__2">定义</th><th class="- topic/entry entry colsep-0 rowsep-1" id="efuse_user_guide__table_jvd_gqy_21c__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="efuse_user_guide__table_jvd_gqy_21c__entry__1">SID</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="efuse_user_guide__table_jvd_gqy_21c__entry__2">Secure ID</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="efuse_user_guide__table_jvd_gqy_21c__entry__3">安全 ID 模块</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="efuse_user_guide__table_jvd_gqy_21c__entry__1">eFuse</td><td class="- topic/entry entry colsep-1 rowsep-0" headers="efuse_user_guide__table_jvd_gqy_21c__entry__2">Electric Fuse</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="efuse_user_guide__table_jvd_gqy_21c__entry__3">电子熔丝</td></tr></tbody></table></div></div></article></main></div>
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Update Time: 2025-01-21
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