XR17C152 Datasheet, PDF (1/62 Pages) Exar Corporation – 5V PCI BUS DUAL UART

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JUNE 2004
GENERAL DESCRIPTION
The XR17C152¹ (152) is a monolithic dual PCI Bus
Universal Asynchronous Receiver and Transmitter
(UART) in Exar’s PCI Bus UART family. The device is
designed to meet today’s 32-bit PCI Bus and high
bandwidth requirement in communication systems.
The global interrupt source register provides a com-
plete interrupt status indication for both channels to
speed up interrupt parsing. Each UART is indepen-
dently controlled and has its own 16C550 compatible
5G (Fifth Generation) register set, transmit and re-
ceive FIFOs of 64 bytes, fully programmable transmit
and receive FIFO trigger levels, transmit and receive
FIFO level counters, automatic hardware flow control
with programmable hysteresis, automatic software
(Xon/Xoff) flow control, automatic half-duplex control
output, wireless IrDA (Infrared Data Association) in-
frared encoder/decoder, 8 multi-purpose definable in-
puts/outputs, and a 16-bit general purpose timer/
counter.
NOTE: 1 Covered by U.S. Patents #5,649,122, #5,949,787
APPLICATIONS
• Network Management
• Factory Automation and Process Control
• Ethernet Network to Serial Ports
• Point-of-Sale Systems
• Remote Access Servers
• Multi serial ports RS-232/RS-422/RS-485 Cards
XR17C152
5V PCI BUS DUAL UART
FEATURES
REV. 1.2.0
• High Performance Dual PCI UART
• PCI Bus 2.2 Target Interface Compliance
• 5V PCI Bus Compliant up to 33MHz Clock
• 32-bit PCI Bus Interface with EEPROM Interface
• A Global Interrupt Source Register for both UARTs
• Data Transfer in Byte, Word and Double-word
• Data Read/Write Burst Operation
• Each UART is independently controlled with:
•16C550 Compatible 5G Register Set
•64-byte Transmit and Receive FIFOs
•Transmit and Receive FIFO Level Counters
•Automatic RTS/CTS or DTR/DSR Flow Control
•Automatic Xon/Xoff Software Flow Control
•Automatic RS485 Half-duplex Control Output with
16 Selectable Turn-around Delay
•Infrared (IrDA 1.0) Data Encoder/Decoder
•Programmable Data Rate with Prescaler
•Up to 6.25 Mbps Serial Data Rate at 5V and 8X
Sampling
• Eight Multi-Purpose Inputs/outputs
• A General Purpose 16-bit Timer/Counter
• Sleep Mode with Automatic Wake-up Indicator
• Same package and pinout as the XR17D152
(14x14x1.0mm TQFP package)
FIGURE 1. BLOCK DIAGRAM
CLK
RST#
AD[31:0]
C/BE[3:0]#
FRAME#
IRDY#
TRDY#
DEVSEL#
STOP#
INTA#
IDSEL
PERR#
SERR#
PAR
EECK
EEDI
EEDO
EECS
ENIR
EN485#
PCI Local
Bus
Interface
Device
Configuration
Registers
Configuration
Space
Registers
EEPROM
Interface
16-bit
Timer/Counter
UART Channel 0
UART
Regs
BRG
64 Byte TX FIFO
TX & RX
IR
ENDEC
64 Byte RX FIFO
UART Channel 1
UART
Regs
BRG
64 Byte TX FIFO
TX & RX
IR
ENDEC
64 Byte RX FIFO
5V VCC
GND
TX0, RX0, DTR0#,
DSR0#, RTS0#,
CTS0#, CD0#, RI0#
TX1, RX1, DTR1#,
DSR1#, RTS1#,
CTS1#, CD1#, RI1#
Multi-pur.pose
Inputs/Outputs
Crystal Osc/Buffer
MPIO0- MPIO7
XTAL1
XTAL2
TMRCK
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com