The transmitting UART takes bytes of data and transmits the bits in a sequential form.

However, a predefined bit rate that is referred to as baud rate usually set in the flash memory of both microcontrollers for the instruction to be understood by both the devices. For example, two microcontrollers operating at different clock frequencies can communicate with each other easily via serial communication. The main advantage of this communication protocol is that its not necessary for both the devices to have the same operating frequency. The data transfers bit by bit digitally in form of bits from one device to another. It transfers data between devices by connecting two wires between the devices, one is the transmission line while the other is the receiving line. Universal Asynchronous Receive Transmit (UART) or Serial communication is one of the most simple communication protocols between two devices. In microcontroller chips, there are usually a number of dedicated UART hardware peripherals available. We can use it for communications over a computer or its peripheral devices such as a mouse, monitor or printer. A Universal asynchronous receiver-transmitter (UART) Communication is usually an individual component or part of an integrated circuit.

A driver circuit handles electric signaling levels between two circuits. It provides features for the configuration of data format and transmission speeds at different baud rates. It is a dedicated hardware device that performs asynchronous serial communication. UART Communication stands for Universal asynchronous receiver-transmitter.

Uart serial communication pdf