XR17D158 Datasheet | Exar

DESCRIPTION FEATURES REV. 1.2.2 The XR17D1581 (D158) is an octal PCI Bus Universal Asynchronous Receiver and Transmitter (UART) with support for PCI Bus universal VIO buffers in the same package and pin-out as the XR17C158, XR17C154 and XR17D154. The device is designed to meet the 32-bit PCI Bus and high bandwidth requirement in munication systems. A global interrupt source register provides a plete interrupt status indication for all 8 channels to speed up interrupt parsing. Each UART has its own 16C550 patible set of configuration registers, transmit and receive FIFOs of 64 bytes, fully programmable transmit and receive FIFO level trigger levels, transmit and receive FIFO level counters, automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis levels, automatic software (Xon/Xoff) flow control, Ir DA (Infrared Data Association) encoder/decoder, 8 multi-purpose inputs/outputs and a 16-bit general purpose timer/ counter. NOTE: 1 Covered by U.S. Patents #5,649,122 and #5,949,787 APPLICATIONS - Universal Form Factor PCI Bus Add-in Card - Remote Access Servers - Network Management - Factory Automation and Process Control - Point-of-Sale Systems - Multi-port RS-232/RS-422/RS-485 Cards - High Performance Octal PCI UART - Universal PCI Bus Buffers - Auto-sense 3.3V or 5V Operation - 32-bit PCI Bus 2.3 Target Signalling pliance - A Global Interrupt Source Register for all 8 UARTs - Data Transfer in Byte, Word and Double-word - Data Read/Write Burst Operation - Each UART is independently controlled with: - 16C550 patible 5G Register Set - 64-byte Transmit and Receive FIFOs - Transmit and Receive FIFO Level Counters - Programmable TX and RX FIFO Trigger Level - Automatic RTS/CTS or DTR/DSR Flow Control - Automatic Xon/Xoff Software Flow Control - RS485 HDX Control Output with Selectable Turn-around Delay - Infrared (Ir DA 1.0) Data Encoder/Decoder - Programmable Data Rate with Prescaler - Up to 6.25 Mbps Serial Data Rate - Eight Multi-Purpose...