SERIAL COMMUNICATION & PROTOCOL ANALYSIS·USART1

UART — Universal Asynchronous Receiver-Transmitter

RUNNINGDirectory

Learning Guide

Learning Objectives

Understand asynchronous point-to-point serial communication without a shared clock.

Identify the 4 components of a UART frame: Start Bit, Data Bits (5-8), Parity Bit, Stop Bits.

Equalize Baud Rate (bits per second) between Transmitter (TX) and Receiver (RX).

Diagnose framing errors and parity mismatches on interactive serial terminals.

Experiment Procedure

Configure TX Baud Rate = 9600, Data Bits = 8, Parity = NONE, Stop Bits = 1.
Configure RX Baud Rate = 9600 to establish compatible communication.
Type a test message 'HELLO' in the TX Terminal and click Transmit.
Mismatched Test: Change RX Baud Rate to 115200 and transmit again to observe the Framing Mismatch Error banner.

Key TakeawayBecause UART is asynchronous, both ends MUST share identical Baud Rate, Data Bits, Parity, and Stop Bit configurations for error-free serial communication.

Laboratory Challenges & Worksheet

1 / 3

LVL 1 · BEGINNER

Attempts: 0100 PTS

Challenge 1: Successful Message Transmission

Verify that TX and RX parameters match, enter a text message in the TX terminal, and click Send to transmit.

Engineering Requirements

›Confirm TX and RX Baud Rate, Data Bits, Parity, and Stop Bits match

›Type a string message into the Transmit Serial Data input box

›Click Send to transmit ASCII data across serial link

Hints (0 / 3)

AI Contextual Assistant

GEMINI 2.5

Educational Guidance: Suggestions assist conceptual learning. State validation is evaluated by the deterministic simulation kernel.

Serial Transceiver

TX/RX Terminals & Data Transmission

USART1

TX Terminal9600-8N1

0 msg

TX buffer idle. Send data below.

RX Terminal9600-8N1

0 msg

RX buffer idle. Awaiting data.

Link Status

Bit Time

104.2µs

Frame Size

10bits

UART Configuration

TX & RX Parameters

Transmitter (TX)

Baud Rate

9600bps

Frame

8-N-1

Baud

Parity

Receiver (RX)