XR16M598
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO
MAY 2008
REV. 1.0.0
FEATURES
GENERAL DESCRIPTION
• 1.62V to 3.63V supply voltage
1
The XR16M598 (598), is a 1.62V to 3.63V octal
Universal Asynchronous Receiver and Transmitter
(UART). 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 16 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.
• 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
■ 16-byte Transmit and Receive FIFOs
■ Fractional Baud Rate Generator
NOTE: Covered by US patents #5,649,122 and #5,949,787
■ Programmable TX and RX FIFO Trigger Level
■ Automatic RTS/CTS or DTR/DSR Flow Control
■ Automatic Xon/Xoff Software Flow Control
APPLICATIONS
• Remote Access Servers
■ RS-485 Half-Duplex Control Output with
• Ethernet Network to Serial Ports
• Network Management
Selectable Turn-around Delay
■ Infrared (IrDA 1.0) Data Encoder/Decoder
■ Programmable Data Rate with Prescaler
• Factory Automation and Process Control
• Point-of-Sale Systems
• Up to 15 Mbps Serial Data Rate
• Pin compatible to XR16V598, XR16V698,
XR16V798 and XR16M698
• Multi-port RS-232/RS-422/RS-485 Cards
FIGURE 1. BLOCK DIAGRAM
UART Channel 0
16 Byte TX FIFO
TX0, RX0, DTR0#,
UART
Regs
IR
DSR0#, RTS0#,
CTS0#, CD0#, RI0#
TX & RX
ENDEC
BRG
16 Byte RX FIFO
RST#
A7:A0
D7:D0
UART Channel 1
UART Channel 2
UART Channel 3
UART Channel 4
UART Channel 5
Data Bus
Interface
Device
Configuration
Registers
IOR#
IOW#
CS#
INT#
16/68#
UART Channel 6
TX7, RX7, DTR7#,
DSR7#, RTS7#,
UART Channel 7
16-bit
Timer/Counter
CTS7#, CD7#, RI7#
XTAL1
XTAL2
TMRCK
Crystal Osc/Buffer
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com