I2C AddressingĮvery I2C Slave has an address that is unique on the I2C bus. Only one device can be master at any given moment, there can be several Slaves. I2C works on the principle of Masters and Slaves, the Master provides the clock signal and orchestrates all of the communications. SCL – The clock signal, which synchronizes the data.I2C is a unidirectional system, so data can only travel in one direction at any given moment. The two communications connections are as follows: It uses two wires for communications and another two for power and ground. We will also build our own I2C sensor.Īs you’ll recall from the last article and video, I2C is a method of exchanging data between integrated circuits, sensors, microcomputers and microcontrollers. We will look into the protocol that I2C uses to transfer data and to establish slave addresses. Today we will continue the discussion about I2C.
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