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XR17V258_08

Description
66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
File Size508KB,70 Pages
ManufacturerExar
Download Datasheet View All

XR17V258_08 Overview

66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT

XR17V258
66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
JULY 2008
REV. 1.0.1
GENERAL DESCRIPTION
The XR17V258
1
(V258) is a single chip 8-channel
66MHz PCI (Peripheral Component Interconnect)
UART (Universal Asynchronous Receiver and
Transmitter)
solution,
optimized
for
higher
performance and lower power. The V258 device with
its fifth generation register set is designed to meet the
high
bandwidth
and
power
management
requirements for multi-serial communication ports for
system administration and management. The 32-bit
66MHz PCI interface is compliant with PCI 3.0 and
PCI power management revision 1.1 specifications.
The device provides an upgrade path for Exar’s
33MHz 5V and Universal PCI UART family of
products in a 144-pin LQFP package.
The V258 consists of eight independent UART
channels, each with set of configuration and
enhanced registers, 64 bytes of Transmit (TX) and
Receive (RX) FIFOs, and a fractional Baud Rate
Generator (BRG). A global interrupt source register
provides a complete interrupt status indication for all
8-channels to speed up interrupt parsing. The V258
device operates at 33/66MHz and features fully
programmable TX and RX FIFO level triggers,
automatic hardware and software flow control, and
automatic RS-485 half duplex direction control output
for software and hardware design simplification.
N
OTE
1:
Covered by U.S. Patents #5,649,122 and #5,949,787
Factory Automation and Process Control
Instrumentation
Multi-port RS-232/RS-422/RS-485 Cards
Point-of-Sale Systems
FEATURES
High performance 32-bit 66MHz PCI UART
PCI 3.0 compliance
PCI power management rev. 1.1 compliance
EEPROM interface for PCI configuration
3.3V supply with 5V tolerant non-PCI (serial) inputs
Data read/write burst operation
Global interrupt register for all eight UART channels
Up to 8 Mbps serial data rate
Eight multi-purpose inputs/outputs
A 16-bit general purpose timer/counter
Sleep mode with wake-up Indicator
Eight independent UART channels controlled with
APPLICATIONS
Remote Access Servers
Storage Network Management
F
IGURE
1. B
LOCK
D
IAGRAM OF THE
XR17V258
16C550 compatible register Set
64-byte TX and RX FIFOs with level counters
and programmable trigger levels
Fractional baud rate generator
Automatic RTS/CTS or DTR/DSR hardware
flow control with programmable hysteresis
Automatic Xon/Xoff software flow control
RS-485 half duplex direction control output
with selectable turn-around delay
Infrared (IrDA 1.0) data encoder/decoder
Programmable data rate with prescaler
AD [31 :0]
C /B E#[3:0]
U AR T C h an nel 0
64-b yte TX FIFO
UA RT
Re gs
TX & RX
IR
EN D E C
T X[7:0]
R X[7:0]
P AR
F R AM E #
T R D Y#
IR D Y#
S T OP #
D E VS E L #
ID S E L #
33/66M H z CL K
R ST#
P E RR #
S E RR #
IN T A#
PME#
E N IR
E E CK
EEDI
EEDO
E E CS
C onfiguration
Space
R e giste rs
16-bit
T ime r/C ounte r
BR G 64-b yte RX FIFO
R TS#[7:0]
PC I L o ca l
Bu s
Int erfa ce
Global
C o n fig u ratio n
R eg isters
U AR T C h an nel 1
D TR #[7:0]
U AR T C h an nel 2
C TS #[7:0]
U AR T C h an nel 3
U AR T C h an nel 4
U AR T C h an nel 5
U AR T C h an nel 6
R I#[7:0]
D SR #[7:0]
D CD #[7:0]
U AR T C h an nel 7
M u lti-p u rp o se
In p u ts/Ou tp u ts
C rystal Osc/B u ffer
M PIO [7:0]
E E PR OM
In terface
X T AL 1/C L K
X T AL 2
T MR C K
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
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