XR16V798 RS-232/RS-422/RS-485 16C550 RS-485 XR16L788 RS485 XR16V798IQ FLY0506

High Performance 8Mbps 2.25V to 3.63V Octal UART with Fractional Baud Rate Generator Ideal for High Speed Data Transmission T he

XR16V798 XR16V798 High Performance 8Mbps 2.25V to 3.63V Octal UART with Fractional Baud Rate Generator Ideal for High Speed Data Transmission T he XR16V798 XR16V798 (V798) offers customers the best overall solution to address the rapid time-to-market demands of next generation applications including remote access servers, network management, factory automation/process control and multi-port RS-232/RS-422/RS-485 RS-232/RS-422/RS-485 communications cards. The XR16V798 XR16V798 is a 2.25V to 3.63V Octal Universal Asynchronous Receiver and Transmitter (UART) with 5V tolerant serial (modem) Major Features inputs. The highly integrated device is designed for high bandwidth · Up to 8 Mbps Serial Data Rate requirement in communication systems. The global interrupt · 2.25V to 3.63V with 5V Tolerant Serial Inputs source register provides a complete interrupt status indication for · Single Interrupt output for all 8 UARTs all 8 channels to speed up interrupt parsing. Each UART channel · A Global Interrupt Source Register for all 8 UARTs has its own 16C550 16C550 compatible set of configuration registers, TX · 5G "Flat" UART Registers for easier programming and RX FIFOs of 64 bytes, fully programmable transmit and receive FIFO trigger levels, TX and RX FIFO level counters, automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis, automatic software (Xon/Xoff) flow control, RS-485 RS-485 half-duplex direction control with programmable turn-around delay, Intel or Motorola bus interface and sleep mode with a wake-up indicator. · Simultaneous Initialization of all UART channels · A General Purpose Command driven 16-bit Timer/counter · Sleep Mode with Wake-up Indication · Highly Integrated Device for Space Saving · Pin compatible to XR16L788 XR16L788. Same 100-pin QFP Package (14x20x3 mm) XR16V798 XR16V798 High Performance 8Mbps 2.25V to 3.63V Octal UART with Fractional Baud Rate Generator XR16V798 XR16V798 Block Diagram UART Channel 0 UART R egs BR G RST# IOR# IR E NDE C 64 Byt RXFIFO e TX0, RX0, DTR0#, DSR0#, RTS0#, CTS0#, CD0#, RI0# UART Channel 1 A7:A0 D7:D0 64 ByteTX FIFO TX & R X Data Bus Interface IOW# Device Configuration Registers UART Channel 2 UART Channel 3 CS# UART Channel 4 INT# UART Channel 5 16/68# UART Channel 6 16-bit Timer/Counter UART Channel 7 Crystal Osc/Buffer XTAL1 XTAL2 TMRCK Applications Features · Each UART is independently controlled with: · 16C550 16C550 Compatible 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 RS485 HDX Control Output with Selectable Turn-around Delay · Infrared (IrDA 1.0) Data Encoder/Decoder · Programmable Fractional Baud Rate Generator with Prescaler TX7, RX7, DTR7#, DSR7#, RTS7#, CTS7#, CD7#, RI7# · 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 RS-232/RS-422/RS-485 Cards Ordering Information Product No. Operating Temp. Range XR16V798IQ XR16V798IQ FLY0506 FLY0506_XR16V798 XR16V798 ©2006 Exar Corporation Package 100-QFP 100-QFP -40°C to +85°C Exar Corporation · 48720 Kato Road · Fremont, CA 94538 · 510.668.7000 · fax 510.668.7001 · www.exar.com