A design scheme of intelligent bus interface based on the embeded ECAN module with DSP is proposed in this paper. In this scheme,the chip ADM3053 released by ADI recently is taken as ECAN interface drive. The chip,in which CAN transceiver,the signal isolation function and DC/DC power supply isolation function were integrated,achieved the purposes of interface miniaturization,low power consumption and low cost. The inner hardware structure of ECAN module and bus interface circuit diagram are given out. In software design,internal memory of ECAN module and mailbox structure are discussed. The software initialization,massge transmission and message receiving process are offered. The solution for message overload of CAN bus is also given out. The testing results show this intelligent bus interface module has good performance and can satisfy the in⁃dustry requirement.% 提出了基于DSP内嵌增强型CAN控制器（ECAN）模块的智能总线接口设计方案。该设计创新性地采用了ADI公司最新发布的ADM3053芯片作为ECAN接口驱动，该芯片集成了CAN收发器、信号隔离、DC/DC供电隔离，达到了接口小型化、低功耗、低成本的目的。给出了ECAN模块系统架构和总线接口硬件电路。在软件设计上，重点论述了ECAN模块内部寄存器和邮箱结构，给出了软件初始化、消息发送、消息接收流程，最后给出了CAN总线消息过载的处理方法。经实测表明，该智能总线接口模块工作稳定，信号品质良好，满足工业控制需求。
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