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Advantages of UART | disadvantages of UART

This page covers advantages and disadvantages of UART. It mentions UART advantages or benefits and UART disadvantages or drawbacks. It also describes UART interface basics.

What is UART?

Introduction:
• UART stands for Universal Asynchronous Receiver/Transmitter
• It uses two lines viz. TxD and RxD for transmit and receive functions.
• It is asynchronous communication. Hence data rate should be matched between devices wanting to communicate.
• It supports data rate of about 230 to 460 Kbps (maximum).
• It supports distance of about 50 feet.
• No common clock is being used. Moreover devices use their own independent clock signals.
• UART protocol consists of start bit, 8 bits of data and stop bit.
• It is also known as RS232 interface.

UART interface diagram

Refer UART vs SPI vs I2C >> and UART vs USART >> for more information.

Benefits or advantages of UART

Following are the benefits or advantages of UART:
➨Hardware complexity is low.
➨As this is one to one connection between two devices, software addressing is not required.
➨Due to its simplicity, it is widely used in the devices having 9 pin connector.

Drawbacks or disadvantages of UART

Following are the disadvantages of UART:
➨It is suitable for communication between only two devices.
➨It supports fixed data rate between devices wanting to communicate otherwise data will be garbled.



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