XR16V698 Datasheet, PDF (1/58 Pages) Exar Corporation – 2.25V TO 3.6V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO

XR16V698
2.25V TO 3.6V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
JULY 2008
REV. 1.0.3
GENERAL DESCRIPTION
The XR16V698¹ (698), is a 2.25V to 3.6V octal
Universal Asynchronous Receiver and Transmitter
(UART) with 5V tolerant inputs. The highly integrated
device is designed for high bandwidth requirement in
communication systems. The global interrupt source
register provides a complete interrupt status
indication for all 8 channels to speed up interrupt
parsing. Each UART has its own 16C550 compatible
set of configuration registers, TX and RX FIFOs of 32
bytes, fully programmable transmit and receive FIFO
trigger levels, automatic RTS/CTS or DTR/DSR
hardware flow control with programmable hysteresis,
automatic software (Xon/Xoff) flow control, RS-485
half-duplex direction control with programmable turn-
around delay, Intel or Motorola bus interface and
sleep mode with a wake-up indicator.
NOTE: Covered by US patents #5,649,122 and #5,949,787
APPLICATIONS
• 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
FEATURES
• 2.25V to 3.6V with 5V Tolerant Inputs
• Single Interrupt output for all 8 UARTs
• A Global Interrupt Source Register for all 8 UARTs
• 5G “Flat” UART Registers for easier programming
• Simultaneous Initialization of all UART channels
• General Purpose 16-bit Timer/counter
• Sleep Mode with Wake-up Indication
• Highly Integrated Device for Space Saving
• Each UART is independently controlled with:
■ 16C550 Compatible 5G Register Set
■ 32-byte Transmit and Receive FIFOs
■ Fractional Baud Rate Generator
■ Programmable TX and RX FIFO Trigger Level
■ Automatic RTS/CTS or DTR/DSR Flow Control
■ Automatic Xon/Xoff Software Flow Control
■ RS-485 Half-Duplex Direction Control Output
with Selectable Turn-around Delay
■ Infrared (IrDA 1.0) Data Encoder/Decoder
■ Programmable Data Rate with Prescaler
• Up to 15 Mbps Serial Data Rate
• Pin compatible to XR16V798. Same 100-pin QFP
Package (14x20x3 mm)
FIGURE 1. BLOCK DIAGRAM
RST#
A7:A0
D7:D0
IOR#
IOW#
CS#
INT#
16/68#
Data Bus
Interface
Device
Configuration
Registers
16-bit
Timer/Counter
UART Channel 0
UART
Regs
BRG
32 Byte TX FIFO
TX & RX
IR
ENDEC
32 Byte RX FIFO
UART Channel 1
UART Channel 2
UART Channel 3
UART Channel 4
UART Channel 5
UART Channel 6
UART Channel 7
Crystal Osc/Buffer
TX0, RX0, DTR0#,
DSR0#, RTS0#,
CTS0#, CD0#, RI0#
TX7, RX7, DTR7#,
DSR7#, RTS7#,
CTS7#, CD7#, RI7#
XTAL1
XTAL2
TMRCK
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com