I2C（Inter Intergrated Circuit）总线是一种用于IC器件之间连接的二线制总线。它通过两根线（SDA，串行数据线；SCL，串行时钟线）在连到总线上的器件之间传送信息，根据地址识别每个器件（不管是微控制器、LCD驱动器、存储器还是键盘接口）根据器件的功能可以工作于发送或接收方式。

-I2C (Inter Intergrated Circuit) bus is a connection between the IC device for two-wire bus. It is through the two lines (SDA, serial data line　SCL, serial clock line) connected to the bus to transfer information between devices, based on the address to identify each device (either micro-controller, LCD driver, memory or keyboard interface) according to the function can work on the device to send or receive.