I2C Protocol: Mini Overview

The I2C Protocol works as follows:

• Master Device (e.g. microcontroller): M
• Slave Device (e.g. DAC): S
• Every Transmission is one byte in length

M: START (joins the bus)
M: SEND (Address)
S: (if address matches) ACK
M: SEND (Byte)
S: ACK
M SEND (Byte)
S: ACK
M: SEND (Byte)
S: ACK
.
.
.
M: STOP (stop to end transmission to this device)