![]() ![]() The appearance of the word asynchronous in the name means that it does not require a clock signal. One is labeled TX, the transmitter, and the other labeled RX, the receiver. This communication system requires two pins, except for the ground. UART stands for Universal Asynchronous Receiver Transmitter. It is not uncommon to have a UART connected to an RS-232 transceiver for a UART peripheral on a microcontroller and an RS-232 based device to communicate with each other. However, this can often be confused with another kind of serial port, which uses the DB9 style connector and uses RS-232 as a hardware protocol. The UART is commonly also referred to as the Serial Port on a device. We hope you will find this resource invaluable next time your design needs to incorporate a serial communication bus. Serial communications are the perfect mechanism for transmitting information between devices such as microcontrollers, data-producing peripherals, and other smart devices. It supports the series of articles we’ve produced to look at some of the different types of Serial Communication Protocols available. It’s not a communication protocol but rather the physical circuit used in microcontrollers or stand-alone ICs to transmit and receive serial data. In this article, we will be looking at the popular UART device.
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