为了保证CAN总线物理层的一致性，CANDT系统参考ISO11898-2标准及主流车企标准对CAN节点相关的参数进行测量，本文主要对CANDT的测试项——总线输入电压限值测试进行解读。主要参考来源总线输入电压限值测试项的评估包括隐性输入电压限值和显性输入电压限值测试，其参考ISO11898-2标准的原理如下：CAN节点隐性输入电压限值一个CAN节点集成电路协议设置为总线空闲时，可检测到的隐性位输入限值应通过图1的电路测量。
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CAN或CANFD提供15Mb/s范围内的灵活数据速率，但仍限于相对低带宽的应用，FlexRay也是如此，它通过其并行数据线提供冗余优势，如果一条线路损坏，另一条线路可以接管其功能，它可用于安全或其他关键功能，如转向或制动控制。MOST是一种信息标准，数据速率可为250和150Mb/s，后者的带宽高于100Mb/s的汽车以太网。但一个关键的区别是MOST的150Mb/s带宽是在环形拓扑网络享，而每个的汽车以太网链路提供完整的100Mb/s带宽。
