The XR16L651IM-F is a single-channel UART (Universal Asynchronous Receiver/Transmitter) with a 64-byte FIFO, manufactured by Exar Corporation. This device is designed for serial communication in a variety of applications, offering features such as automatic hardware and software flow control and programmable baud rate generation.

Applications

• Serial Ports: Used to provide serial communication ports in embedded systems and computers.
• Industrial Control Systems: Enables communication between controllers and sensors.
• Modems: Facilitates serial data transmission in modem applications.
• Point-of-Sale (POS) Systems: Supports serial communication with peripherals like barcode scanners and receipt printers.
• Networking Equipment: Used for configuration and monitoring via serial interfaces.

Features

• Single UART Channel: Provides one independent UART channel.
• 64-Byte FIFO: Features a 64-byte FIFO for both transmit and receive data, reducing CPU overhead.
• Data Rates up to 5 Mbps: Supports high-speed serial communication.
• Automatic Hardware/Software Flow Control: Includes automatic RTS/CTS and Xon/Xoff flow control.
• Programmable Baud Rate Generator: Allows for flexible baud rate settings.
• Interrupt Generation: Notifies the host processor of various communication events.

Benefits

• Improved Data Throughput: The large FIFO minimizes the need for frequent CPU intervention.
• Reduced CPU Overhead: Automatic flow control and FIFO buffering reduce the load on the processor.
• Flexible Configuration: Programmable baud rate generator allows for adaptation to different serial communication protocols.
• Reliable Data Transfer: Automatic flow control ensures reliable data transfer.
• Simplified System Design: Single-channel UART simplifies board design compared to multi-channel solutions when only one port is needed.

Additional Details

The XR16L651IM-F operates with a supply voltage of 3.3V or 5V. It supports 5, 6, 7, and 8 data bits, with odd, even, or no parity. The device’s interrupt system is designed to minimize latency and ensure timely response to serial communication events. The datasheet provides detailed electrical characteristics, timing diagrams, and register descriptions.