XR16L784 Datasheet | Exar

DESCRIPTION The XR16L7841 (784) is a quad Universal Asynchronous Receiver and Transmitter (UART). The device is designed for high bandwidth requirement in munication systems. The global interrupt source register provides a plete interrupt status indication for all 4 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 triggers, transmit and receive FIFO level counters, automatic RTS/CTS or DTR/ DSR hardware flow control with programmable hysteresis, automatic software (Xon/Xoff) flow control, Ir DA (Infrared Data Association) encoder/ decoder, and a 16-bit general purpose timer/counter. NOTE: 1 Covered by U.S. Patents #5,649,122 and #5,949,787 FEATURES APPLICATIONS - 2.97V to 5.5V operation with 5V Tolerant Inputs - 8-bit Intel or Motorola Data Bus Interface - Single Open Drain Interrupt output for all 4 channels - Global Interrupt Source Registers for all channels - 5G (Fifth Generation) “Flat” Register Set - Each UART is Independently Controlled with: - 16C550 patible Registers - 64-byte Transmit and Receive FIFOs - Transmit and Receive FIFO Level Counters - Programmable TX and RX FIFO Trigger Levels - Automatic RTS/CTS or DTR/DSR Flow Control - Selectable RTS Flow Control Hysteresis - Automatic Xon/Xoff Software Flow Control - Automatic RS485 Half-duplex Control Output with 16 Selectable Turn-around Delay - Remote Access Servers - Ethernet Network to Serial Ports - Network Management - Factory Automation and Process Control - Point-of-Sale Systems - Multi-port RS-232/RS-422/RS-485 Cards FIGURE 1. BLOCK DIAGRAM - Infrared (Ir DA 1.1) Data Encoder/Decoder - Programmable Data Rate with Prescaler - Up to 3.12 (16x) and 6.25 (8x) Mbps Data Rate - A General Purpose 16-bit Timer/Counter - Sleep Mode with Automatic Wake-up Indicator - 64-pin TQFP Package (10x10x1.4 mm) - All Inputs are 5V Tolerant (Except XTAL1) UART Channel 0 A7:A0...