XR17D158_05 Datasheet, PDF (1/73 Pages) Exar Corporation – UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART

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XR17D158
UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
AUGUST 2005
GENERAL DESCRIPTION
FEATURES
REV. 1.2.2
The XR17D158¹ (D158) is an octal PCI Bus
Universal Asynchronous Receiver and Transmitter
(UART) with support for PCI Bus universal VIO
buffers in the same package and pin-out as the
XR17C158, XR17C154 and XR17D154. The device
is designed to meet the 32-bit PCI Bus and high
bandwidth requirement in communication systems. A
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, transmit and
receive FIFOs of 64 bytes, fully programmable
transmit and receive FIFO level trigger levels,
transmit and receive FIFO level counters, automatic
RTS/CTS or DTR/DSR hardware flow control with
programmable hysteresis levels, automatic software
(Xon/Xoff) flow control, IrDA (Infrared Data
Association) 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 and #5,949,787
APPLICATIONS
• Universal Form Factor PCI Bus Add-in Card
• Remote Access Servers
• Network Management
• Factory Automation and Process Control
• Point-of-Sale Systems
• Multi-port RS-232/RS-422/RS-485 Cards
• High Performance Octal PCI UART
• Universal PCI Bus Buffers - Auto-sense 3.3V or 5V
Operation
• 32-bit PCI Bus 2.3 Target Signalling Compliance
• A Global Interrupt Source Register for all 8 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
■ Programmable TX and RX FIFO Trigger Level
■ Automatic RTS/CTS or DTR/DSR Flow Control
■ Automatic Xon/Xoff Software Flow Control
■ RS485 HDX Control Output with Selectable
Turn-around Delay
■ Infrared (IrDA 1.0) Data Encoder/Decoder
■ Programmable Data Rate with Prescaler
■ Up to 6.25 Mbps Serial Data Rate
• 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 XR17C158,
XR17C154 and XR17D154
FIGURE 1. BLOCK DIAGRAM
3.3V or 5V
VIO
CLK
RST#
AD[31:0]
C/BE[3:0]#
FRAME#
IRDY#
TRDY#
DEVSEL#
STOP#
INTA#
IDSEL
PERR#
SERR#
PAR
EECK
EEDI
EEDO
EECS
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 Channel 2
UART Channel 3
UART Channel 4
UART Channel 5
UART Channel 6
UART Channel 7
Multi-pur.pose
Inputs/Outputs
Crystal Osc/Buffer
5V VCC
(Core Logic)
GND
TX0, RX0, DTR0#,
DSR0#, RTS0#,
CTS0#, CD0#, RI0#
TX7, RX7, DTR7#,
DSR7#, RTS7#,
CTS7#, CD7#, RI7#
MPIO0- MPIO7
XTAL1
XTAL2
TMRCK
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com