I^2C总线板卡热插拔电路设计  

Design of Hot Swap Circuit for I^2C Bus Card

作　　者：蒋婷 蔡洁明 印琴 JIANG Ting;CAI Jieming;YIN Qin(East Technology,Inc.,Wuxi 214072,China;China Key System&Integrated Circuit Co.,Ltd.,Wuxi 214072,China)

机构地区：[1]无锡中微亿芯有限公司,江苏无锡214072 [2]中科芯集成电路有限公司,江苏无锡214072

出　　处：《电子与封装》2020年第8期39-42,共4页Electronics & Packaging

摘　　要：提出了一种适用于I^2C总线板卡的热插拔电路,解决了一直以来I^2C板卡无法热插拔的问题。在介绍热插拔对系统影响的基础上,给出了热插拔电路的详细设计方案。设计的电路具有总线状态检测功能,通过总线预充电和电容隔离的方法使板卡在热插拔过程中对总线的干扰降低到最小,有效保证了系统工作的稳定性。A hot swap circuit design for I^2C bus card was put forward,which solved the problem during hot insertion into a live backplane of I^2C bus card.By introducing the impact on the system during hot insertion,a detailed circuit design method for hot insertion was proposed.The circuit had a function of bus state detection.By bus voltage pre-charging and capacitance isolation,the disturbance on the bus was significantly decreased during hot insertion,which ensured the stability of the system effectively.

关 键 词：I^2C总线 热插拔 总线状态检测 预充电 电容隔离 

分 类 号：TN402[电子电信—微电子学与固体电子学]