The 2-wire interface is a widely used Master, multi-slave protocol using a serial clock (SCL) and a serial data line (SDA).
此2线接口是一个广泛使用的主机、使用串行时钟（SCL）和串行数据线（SDA）的多从机 协议。
PROFIBUS DP is a kind of multi master-slave station structure bus, and the communication between the masters is Token way, and subordination between the master and slaves.
PROFIBUS DP是一种多主从总线，采用主站间按令牌方式、从站和主站间按主从方式进行数据通信的工作方式。
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