UART

In the applications of computer peripheral devices, UART is widely used in various scenarios, including connecting keyboards, mice, printers, and more. The use of this communication protocol extends beyond hardware devices and also encompasses software and embedded systems. The flexibility and stability of UART make it an ideal choice for communication between computer peripheral devices.

In terms of signals, UART uses two main communication lines, namely TX (Transmit) and RX (Receive). RX refers to received data or input. TX refers to transmitted data or output. This bidirectional communication design ensures effective communication between devices, and UART typically operates at voltages of 3.3V or 5V. The choice of this voltage specification depends on the specific application requirements and the specifications of the relevant devices.

Logic Analyzer / MSO

TB3016F

TB3000 series Specifications PDF

MSO2116E (w/ analog channels)

MSO2000 series Specifications PDF

MSO3124V (w/ electrical validation)

MSO3000 series Specifications PDF

UART Decode

Save as TXT/CSV

In Logic Analyzer mode, click the icon above the report area to save the decoded data as a TXT/CSV file.

UART Electrical Validation

Use an oscilloscope for UART electrical validation to ensure compliance with defined specifications. After an extended burn-in test, the oscilloscope confirms that the electrical characteristics of the signal meet the required standards.

Supported Models: TS3124V (4-channel DSO), MSO3124V (4-channel DSO + 16-channel LA)

Electrical Validation Solution PDF

UART Decoding Setup Steps

1. Click Quick Settings or Add Protocol Decode to select a protocol for logic analyzer capture.

2. Select UART(RS232) for decoding.

3. If you use Quick Settings, the system will recommend configurations for trigger type, sampling rate, voltage threshold, and channel settings.

4. Click the icon to access the Decode Settings screen.

Decode Settings:

Channel:

Rx: Show Rx data in report window.

Format:

Auto Detect: Set the Baud Rate manually if not selected.

Baud Rate: Data rate (bits per second), and the range is 110 ~ 2M (bps).

Data Bits: 4 to 16 bits.

Polarity: Idle high and Idle low.

Parity: N (None), O (Odd), or E (Even).

Stop Bits: 1 to 2 bit(s).

MSB first: The default is LSB first; click it to change to MSB first.

Waveform Area Settings:

Show scale in the waveform: Display the waveforms with scales.

Report Area Settings:

Report Unknown and Idle: Display the unknown and idle data in the Report Window.

Line Wrap Data: Use 1-2 value (hex) as header of data.

YouTube Video

UART Decoding Examples