Question

What is the difference between UART and USART communication?

(a) they are the names of the same particular thing, just the difference of A and S is there in it

(b) one uses asynchronous means of communication and the other uses synchronous means of communication

(c) one uses asynchronous means of communication and the other uses asynchronous and synchronous means of communication

(d) one uses angular means of the communication and the other uses linear means of communication

I got this question by my school principal while I was bunking the class.

This interesting question is from Serial Port Communication in portion 8051 Microcontroller of Microcontroller

Answer 1

Correct answer is (c) one uses asynchronous means of communication and the other uses asynchronous and synchronous means of communication

Easiest explanation: UART stands for Universal Asynchronous receiver-transmitter and USART stands for Universal Synchronous and Asynchronous receiver-transmitter.