UART Protocol Support

UART (Universal Asynchronous Receiver-Transmitter) is one of the oldest and most widely used serial communication interfaces in electronics. Unlike synchronous protocols such as SPI and I2C, UART does not use a shared clock signal — instead, both the transmitter and receiver must agree on a baud rate (common rates include 9600, 115200, 460800, and up to several Mbps). UART communication uses two data lines: TX (Transmit) and RX (Receive), enabling full-duplex bidirectional communication. Each data frame consists of a start bit, 5 to 9 data bits, an optional parity bit, and one or two stop bits. UART is the underlying transport for RS-232, RS-422, and RS-485 physical layer standards, and it remains the primary debug console interface for embedded Linux systems, microcontrollers, GPS modules, Bluetooth modules, and cellular modems. Because UART is asynchronous, protocol analysis is particularly important for identifying baud rate mismatches, framing errors, parity errors, and break conditions that are difficult to diagnose from raw waveforms alone. Engineers frequently need to capture and decode UART data to verify firmware debug output, monitor modem AT commands, and validate data integrity between two devices. A logic analyzer with UART decode translates bit-level signals into readable ASCII or hex data streams.