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< div class = "date inPage" > 16 May 2025< / div > < div style = "color: gray;" >
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Read time: 1 minute(s)
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< p class = "- topic/p p" data-ofbid = "d125139e37__20250519091518" > I2C 模块是一种用于连接 CPU 主机与 I< sup class = "+ topic/ph hi-d/sup ph sup" > 2< / sup > C 总线之间的接口，包括一根串行数据线 (SDA) 和一根串行时钟线
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(SCL)，分别用于传输数据和时钟信号，是实现 I2C 通信的基础。在 I< sup class = "+ topic/ph hi-d/sup ph sup" > 2< / sup > C 总线上，每个设备都有一个唯一的地址。当主设备 (master)
希望与从设备 (slave) 通信时，会通过发送从设备 (slave)
的地址来建立连接。这种寻址方式允许在同一总线上连接多个设备， ， ，
支持多种传输模式，以满足不同的应用需求。< / p >
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< div class = "table-container" > < table class = "- topic/table table frame-all" id = "i2c_user_guide__table_w3g_mtr_21c" data-ofbid = "i2c_user_guide__table_w3g_mtr_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:28.732394366197184%" / > < col style = "width:28.169014084507044%" / > < col style = "width:43.098591549295776%" / > < / colgroup > < thead class = "- topic/thead thead" >
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< th class = "- topic/entry entry colsep-1 rowsep-1" id = "i2c_user_guide__table_w3g_mtr_21c__entry__2" > < p class = "- topic/p p" data-ofbid = "d125139e69__20250519091518" > 定义< / p > < / th >
< th class = "- topic/entry entry colsep-0 rowsep-1" id = "i2c_user_guide__table_w3g_mtr_21c__entry__3" > < p class = "- topic/p p" data-ofbid = "d125139e73__20250519091518" > 注释说明< / p > < / th >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__1" > < p class = "- topic/p p" data-ofbid = "d125139e83__20250519091518" > SDA< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__2" > < p class = "- topic/p p" data-ofbid = "d125139e87__20250519091518" > I2C 数据线< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__3" > < p class = "- topic/p p" data-ofbid = "d125139e91__20250519091518" > -< / p > < / td >
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< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__1" > < p class = "- topic/p p" data-ofbid = "d125139e98__20250519091518" > SCL< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__2" > < p class = "- topic/p p" data-ofbid = "d125139e102__20250519091518" > I2C 时钟线< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__3" > < p class = "- topic/p p" data-ofbid = "d125139e106__20250519091518" > -< / p > < / td >
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< / tr >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__1" > < p class = "- topic/p p" data-ofbid = "d125139e113__20250519091518" > I2C algorithm< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__2" > < p class = "- topic/p p" data-ofbid = "d125139e117__20250519091518" > I2C 通信方法< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__3" > < p class = "- topic/p p" data-ofbid = "d125139e121__20250519091518" > 提供产生 I2C 总线访问的通信函数< / p > < / td >
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< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__1" > < p class = "- topic/p p" data-ofbid = "d125139e128__20250519091518" > I2C adapter< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__2" > < p class = "- topic/p p" data-ofbid = "d125139e132__20250519091518" > I2C 适配器< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__3" > < p class = "- topic/p p" data-ofbid = "d125139e136__20250519091518" > 对 I2C 控制器的软件抽象< / p > < / td >
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< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-0" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__1" > < p class = "- topic/p p" data-ofbid = "d125139e143__20250519091518" > I2C client< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-0" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__2" > < p class = "- topic/p p" data-ofbid = "d125139e147__20250519091518" > I2C 用户端< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" headers = "i2c_user_guide__table_w3g_mtr_21c__entry__3" > < p class = "- topic/p p" data-ofbid = "d125139e151__20250519091518" > 一个 client 对应一个 I2C device< / p > < / td >
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< / tr >
< / tbody > < / table > < / div >
< / div >
< section class = "- topic/section section" id = "i2c_user_guide__section_mb5_trn_4dc" data-ofbid = "i2c_user_guide__section_mb5_trn_4dc" > < h2 class = "- topic/title title sectiontitle" > 模块特性< / h2 >
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< div class = "- topic/p p" data-ofbid = "d125139e164__20250519091518" >
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< ul class = "- topic/ul ul" id = "i2c_user_guide__ul_rcv_ktr_21c" data-ofbid = "i2c_user_guide__ul_rcv_ktr_21c" >
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< li class = "- topic/li li" data-ofbid = "d125139e168__20250519091518" >
< p class = "- topic/p p" data-ofbid = "d125139e170__20250519091518" > 支持主和从模式< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d125139e174__20250519091518" >
< p class = "- topic/p p" data-ofbid = "d125139e176__20250519091518" > 支持最高 400Kb/s 传输< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d125139e180__20250519091518" >
< p class = "- topic/p p" data-ofbid = "d125139e182__20250519091518" > 支持 7 bits 和 10 bits 寻址< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d125139e186__20250519091518" >
< p class = "- topic/p p" data-ofbid = "d125139e188__20250519091518" > 支持时钟同步< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d125139e192__20250519091518" >
< p class = "- topic/p p" data-ofbid = "d125139e194__20250519091518" > 支持中断和轮询模式< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d125139e199__20250519091518" >
< p class = "- topic/p p" data-ofbid = "d125139e201__20250519091518" > 可编程 SDA 保持时间< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d125139e205__20250519091518" >
< p class = "- topic/p p" data-ofbid = "d125139e207__20250519091518" > 可编程防止 I< sup class = "+ topic/ph hi-d/sup ph sup" > 2< / sup > C 通信异常总线挂死< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d125139e214__20250519091518" >
< p class = "- topic/p p" data-ofbid = "d125139e216__20250519091518" > 支持 DMA 传输< / p >
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< / li >
< / ul >
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< / div >
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< / section >
< / div >
< / article > < / main > < / div >
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< div class = " wh_child_links d-print-none " > < nav aria-label = "Child Links" role = "navigation" class = "- topic/related-links related-links" > < ul class = "ullinks" > < li class = "- topic/link link ulchildlink" > < strong > < a href = "../../../topics/sdk/i2c/i2c_config_lite.html" > 参数配置< / a > < / strong > < / li > < li class = "- topic/link link ulchildlink" > < strong > < a href = "../../../topics/sdk/i2c/i2c_debug_lite.html" > 调试指南< / a > < / strong > < / li > < li class = "- topic/link link ulchildlink" > < strong > < a href = "../../../topics/sdk/i2c/i2c_test_lite.html" > 测试指南< / a > < / strong > < / li > < li class = "- topic/link link ulchildlink" > < strong > < a href = "../../../topics/sdk/i2c/i2c_design_lite.html" > 设计说明< / a > < / strong > < / li > < / ul > < / nav > < / div >
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< / div >
< / div >
< / div >
< / div >
< footer class = "navbar navbar-default wh_footer" >
< div class = " footer-container mx-auto " >
< title > footer def< / title >
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< style >
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.p1 {
font-family: FangZhengShuSong, Times, serif;
}
.p2 {
font-family: Arial, Helvetica, sans-serif;
}
.p3 {
font-family: "Lucida Console", "Courier New", monospace;
}
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< / style >
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< div class = "webhelp.fragment.footer" >
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< p class = "p1" > Copyright © 2019-2025 广东匠芯创科技有限公司. All rights reserved.< / p >
< / div >
< div >
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< div class = "generation_time" >
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Update Time: 2025-05-19
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< / div >
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< / div >
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< / div >
< / footer >
< div id = "go2top" class = "d-print-none" >
< span class = "oxy-icon oxy-icon-up" > < / span >
< / div >
< div id = "modal_img_large" class = "modal" >
< span class = "close oxy-icon oxy-icon-remove" > < / span >
< div id = "modal_img_container" > < / div >
< div id = "caption" > < / div >
< / div >
< script src = "${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer = "defer" > < / script >
< / body >
< / html >
