DESCRIPTION
The XR16C8721 (872) is a dual universal asynchronous receiver and transmitter (UART) with a 1284 bi-directional parallel port and ISA Bus Plug-and-Play (PnP) interface. The PnP interface supports auto configuration for desktop and embedded PC computers.

FEATURES
• Plug and Play ISA Bus Specification Compliant
    - Auto Configuration
    - Direct Connection, Needing no External Buffers
    - Resource Data in External 4K EEPROM
    - 10-Interrupts IRQ3-7, IRQ9-12, IRQ15
• Manual Configuration for Standard COM1-COM-4 and LPT1-LPT2
• IEEE 1284 Compliant
    - Bidirectional Host Port
    - Level-II Electrical Interface, Needing no External Transceivers
    - Standard Centronics/ECP/EPP Mode
    - 16-byte FIFO in ECP mode
• Dual UART Software Compatible with 16C550
• 128-Byte Transmit and Receiver FIFOs Reduce CPU Interrupt
• FIFO Counters in Transmitter and Receiver
• Automatic RTS/CTS Flow Control with Hysteresis to Increase Data Throughput
• IrDA Infrared Pulse Shaping Encoder/Decoder for up to 115.2Kbps Data Rate
• Up to 460.8 Kbps Standard Serial Data Rate
• +5V and +3.3V Operation
• 100-pin Quad Flat Package (14x20mm)
• Reference PC ISA Card Design Available
• Windows295, 98 and NT4.0 Device Drivers are Available

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APPLICATIONS
• Multi-function PC/ISA Bus Card with RS-232/RS-422/RS-485 Interface and Printer/parallel Port
• Embedded Systems
• Portable Infrared Wireless Systems
• High-speed Bidirectional Parallel Port
• High-speed Serial Ports