I2C总线最主要的优点是其简单性和有效性。由于接口直接在组件之上，因此I2C总线占用的空间非常小，减少了电路板的空间和芯片管脚的数量，降低了互联成本。总线的长度可高达25英尺，并且能够以10Kbps的最大传输速率支持40个组件。-I2C Bus The main advantage is its simplicity and effectiveness. As the interface directly in the components above the I2C bus, therefore the space occupied is very small, a reduction of circuit board space and pin number of chip, reducing the cost of the Internet. Bus length can be as high as 25 feet, and to the maximum transfer rate of 10Kbps support components 40.