XR17D152 Datasheet, PDF (1/68 Pages) Exar Corporation – UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART

áç
XR17D152
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
JUNE 2004
GENERAL DESCRIPTION
FEATURES
REV. 1.2.0
The XR17D152¹ (D152) 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
complete interrupt status indication for both channels
to speed up interrupt parsing. Each UART is
independently controlled and has its own 16C550
compatible 5G (Fifth Generation) register set,
transmit and receive 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) infrared encoder/
decoder, 8 multi-purpose inputs/outputs and a 16-bit
general purpose timer/counter.
NOTE: 1 Covered by U.S. Patents #5,649,122, #5,949,787
APPLICATIONS
• Universal PCI Bus Add-in Card
• Network Management
• Factory Automation and Process Control
• Ethernet Network to Serial Ports
• Point-of-Sale Systems
• Multi serial ports RS-232/RS-422/RS-485 Cards
• High Performance Dual PCI UART
• Universal PCI Bus Buffers - Auto-sense 3.3V and
5V Operation
• 32-bit PCI Bus 2.3 Target Signalling Compliance
• 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:
s 16C550 Compatible 5G Register Set
s 64-byte Transmit and Receive FIFOs
s Transmit and Receive FIFO Level Counters
s Programmable TX and RX FIFO Trigger Level
s Automatic RTS/CTS or DTR/DSR Flow Control
s Automatic Xon/Xoff Software Flow Control
s Automatic RS485 HDX Control Output with
Selectable Turn-around Delay
s Infrared (IrDA 1.0) Data Encoder/Decoder
s Programmable Data Rate with Prescaler
s Up to 6.25 Mbps Data Rate at 8X Sampling
• Eight Multi-Purpose Inputs/outputs
• A General Purpose 16-bit Timer/Counter
• Sleep Mode with Automatic Wake-up
• EEPROM Interface for PCI Configuration
• Same package and pin-out as the XR17C152
(14x14x1.0 mm TQFP)
FIGURE 1. BLOCK DIAGRAM
3.3V or 5V
(PCI VI/O
Power Supply)
CLK (33 MHz)
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
VCC
(Core Logic)
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