The XR16L580 is an octal UART (Universal Asynchronous Receiver/Transmitter) with FIFOs manufactured by Exar Corporation. It is a highly integrated device that provides eight independent UART channels, making it suitable for applications requiring multiple serial communication interfaces. The device incorporates advanced features such as large FIFOs and flexible interrupt management to enhance system performance and reduce processor overhead.

Applications

• Multi-Port Serial Cards: Used in servers and workstations to provide multiple serial ports.
• Industrial Automation Systems: Connects multiple sensors, actuators, and controllers.
• Point-of-Sale (POS) Systems: Supports multiple serial peripherals such as barcode scanners, receipt printers, and payment terminals.
• Network Management Devices: Provides serial communication interfaces for managing network devices.
• Embedded Systems: Integrates multiple serial communication channels for various microcontroller-based applications.

Features

• Octal UART: Contains eight independent UART channels.
• 64-Byte FIFO: Each UART channel has a 64-byte FIFO (First-In, First-Out) for both transmit and receive data.
• 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 flexible baud rate settings for each UART channel.
• Multi-drop Mode: Supports multi-drop serial communication for connecting multiple devices on a single bus.
• Interrupt Generation: Generates interrupts to signal various events, such as data reception, transmission completion, and error conditions.

Benefits

• High Integration: Eight UART channels in a single package reduce board space and component count.
• Improved Data Throughput: Large FIFOs minimize processor intervention and improve data throughput.
• Reduced Processor Overhead: FIFOs and automatic flow control mechanisms reduce the load on the host processor.
• Flexible Communication: Programmable baud rate generator and multi-drop mode allow adaptation to different communication protocols.
• Enhanced System Reliability: Automatic flow control ensures reliable data transfer.

Additional Details

The XR16L580 typically 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 includes a comprehensive set of control and status registers for each UART channel. The interrupt system is designed to minimize latency and ensure timely handling of serial communication events. The datasheet specifies detailed electrical characteristics, timing diagrams, and register descriptions.