The XR16C872IQ is a dual UART (Universal Asynchronous Receiver/Transmitter) manufactured by Exar Corporation. This device provides two independent UART channels, each capable of asynchronous serial communication. It is designed for a wide range of applications requiring serial data exchange, offering flexibility and efficiency in managing multiple serial interfaces.

Applications

• Serial Communication Ports: Used in computers, embedded systems, and industrial equipment.
• Modems and Networking Devices: Facilitates serial communication for data transmission.
• Point-of-Sale (POS) Systems: Enables serial connectivity for peripherals like barcode scanners and receipt printers.
• Industrial Automation: Connects sensors, actuators, and controllers in serial communication networks.
• Embedded Systems: Provides serial communication capabilities for various microcontroller-based applications.

Features

• Dual UART: Contains two independent UART channels.
• Data Rates up to 5 Mbps: Supports high-speed serial communication.
• Automatic Hardware/Software Flow Control: Provides reliable data transfer with flow control mechanisms.
• Programmable Baud Rate Generator: Allows flexible baud rate settings.
• 16-Byte FIFO: Buffers transmit and receive data to prevent data loss.
• Interrupt Generation: Notifies the host processor of various events.

Benefits

• Increased System Efficiency: Dual UART channels enable simultaneous communication over multiple serial interfaces.
• Enhanced Data Reliability: Automatic flow control ensures reliable data transfer.
• Flexible Baud Rate Settings: Programmable baud rate generator allows adaptation to different communication protocols.
• Reduced Processor Overhead: FIFO buffers and interrupt generation minimize the load on the host processor.
• Simplified System Design: Integration of two UART channels in a single device simplifies circuit design.

Additional Details

The XR16C872IQ operates with a supply voltage range of 3.3V or 5V, providing compatibility with various system architectures. It supports multiple serial communication formats, including 5, 6, 7, and 8 data bits, with odd, even, or no parity. The device offers a wide range of control and status registers, allowing for precise configuration and monitoring of the UART channels. The datasheet specifies detailed electrical characteristics, including timing parameters, interrupt behavior, and register descriptions.