I2C在硬件上的接法如下所示，主控芯片引出两条线SCL，SDA线，在一条I2C总线上可以接很多I2C设备，我们还会放一个上拉电阻（放一个上拉电阻的原因以后我们再说）。 体育老师：可以把球发给学生，也可以把球从学生中接过来。 ⚫ 然后发出一个设备地址（用来 ...

This FAQ analyzes the open-drain physical layer and the nuances of register-level addressing to better understand I2C communication.

In my last column [LJ, December 2003], we discussed how I2C bus drivers and I2C algorithm drivers work. We also described how to make a tiny dummy I2C bus driver. This month, we discuss how an I2C ...