It is a bidirectional two-wire serial bus that uses serial clock (SCL) and serial data (SDA) wires to send and manage data between devices connected to the bus.īecause I2C operates using a serial clock, it considered to be synchronous, which allows the output of bits to be synchronized to the sampling of bits by a clock signal shared between the master and the slave. I2C, or Inter-Integrated Circuit, is a communication protocol often used in embedded systems as a way to transfer data between a master (or multiple masters) and a single slave (or multiple slaves) device. In this article, we’ll cover the basics of I2C and UART communication, and the differences between them. Both are often used for similar objectives, but do have some notable similarities and differences. ![]() There are multiple forms of communication that can be used in an embedded system, including a communication protocol, such as I2C, or through a physical circuit like UART. They are what governs how data is sent over the bus, including whether data is sent serially, parallelly, asynchronously, or through a master/slave paradigm. ![]() ![]() Communication protocols are some of the essential building blocks of an embedded system.
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