XR17C158 Exar Corporation, XR17C158 Datasheet
XR17C158
Manufacturer Part Number
XR17C158
Description
Eight-channel Pci-based (UART)
Manufacturer
Exar Corporation
Datasheet
1.XR17C158.pdf
(51 pages)
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MARCH 2000
GENERAL DESCRIPTION
The XR17C158
chronous Receiver and Transmitter (UART). The de-
vice is designed to meet the 32-bit PCI Bus and high
bandwidth requirement in communication systems.
The global interrupt source register provides a com-
plete 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 pro-
grammable transmit and receive FIFO level triggers,
transmit and receive FIFO level counters, automatic
RTS/CTS or DTR/DSR hardware flow control with
programmable hysteresis, automatic software (Xon/
Xoff) flow control, IrDA (Infrared Data Association)
encoder/decoder, 8 multi-purpose definable inputs/
outputs, and a 16-bit general purpose timer/counter.
N
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
EXAR
F
OTE
IGURE
CLK
RST#
AD[31:0]
C/BE[3:0]#
FRAME#
IRDY#
TRDY#
DEVSEL#
STOP#
INTA#
IDSEL
PERR#
SERR#
PAR
EECK
EEDI
EEDO
EECS
:
1 Covered by U.S. Patent #5,649,122 and #5,832,205
Corporation 48720 Kato Road, Fremont CA, 94538
1. B
LOCK
1
(158) is an octal Universal Asyn-
D
Configuration
IAGRAM
EEPROM
PCI Local
Registers
Interface
Interface
Space
Bus
Timer/Counter
16-bit
Configuration
Registers
Device
PRELIMINARY
•
(510) 668-7000
FEATURES
• High Performance Octal UART
• 32-bit PCI Bus Interface with EEPROM Interface
• Each UART Includes
• Eight Multi-Purpose Inputs/outputs
• A General Purpose 16-bit Timer/Counter
• Sleep Mode with Automatic Wake-up
• 5V Operation (PCI Compliance)
• 3.3V Operation with 5V Tolerant Inputs
• 144-pin TQFP Package (20x20x1.4mm)
- Interrupt Source Register for all 8 UARTs
- Data Transfer in Byte, Word and Double-word
- 16C550 Compatible Registers
- 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
- RS485 Half-duplex Control with Selectable Delay
- Infrared (IrDA 1.0) Data Encoder/Decoder
- Programmable Data Rate with Prescaler
- Up to 6.25 Mbps Serial Data Rate
- Read/Write Burst Operation
UART
Regs
BRG
Crystal Osc/Buffer
UART Channel 0
UART Channel 1
UART Channel 2
UART Channel 3
UART Channel 4
UART Channel 5
UART Channel 6
UART Channel 7
Inputs/Outputs
Multi-purpose
•
FAX (510) 668-7017
TX & RX
64 Byte TX FIFO
64 Byte RX FIFO
PCI BUS OCTAL UART
.
ENDEC
IR
XR17C158
TX0, RX0, DTR0#,
DSR0#, RTS0#,
CTS0#, CD0#, RI0#
•
TX7, RX7, DTR7#,
DSR7#, RTS7#,
CTS7#, CD7#, RI7#
MPIO0- MPIO7
XTAL1/CLK
XTAL2
TMRCK
www.exar.com
REV. 1.0.1
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