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Exar Corporation - HIGH PERFORMANCE QUAD PCI-EXPRESS UART

Numéro de référence XR17V354
Description HIGH PERFORMANCE QUAD PCI-EXPRESS UART
Fabricant Exar Corporation 
Logo Exar Corporation 





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XR17V354 fiche technique
PRELIMINARY
XR17V354
HIGH PERFORMANCE QUAD PCI-EXPRESS UART
JULY 2009
REV. P1.0.2
GENERAL DESCRIPTION
The XR17V3541 (V354) is a single chip 4-channel
PCI Express (PCIe) UART (Universal Asynchronous
Receiver and Transmitter), optimized for higher
performance and lower power. The V354 serves as a
single lane PCIe bridge to 4 indepedent enhanced
16550 compatible UARTs. The V354 is compliant to
PCIe 2.0 Gen 1 (2.5GT/s).
In addition to the UART channels, the V354 has 16
multi-purpose I/Os (MPIOs), a 16-bit general purpose
counter/timer and a global interrupt status register to
optimize interrupt servicing.
Each UART of the V354 has many enhanced
features such as the 256-bytes TX and RX FIFOs,
programmable Fractional Baud Rate Generator,
Automatic Hardware or Software Flow Control, Auto
RS-485 Half-Duplex Direction Control, programmable
TX and RX FIFO Trigger Levels, TX and RX FIFO
Level Counters, infrared mode, and data rates up to
25Mbps. The V354 is available in a 176-pin FPBGA
package (13 x 13 mm).
NOTE 1: Covered by U.S. Patents #5,649,122, #6,754,839,
#6,865,626 and #6,947,999
APPLICATIONS
Next generation Point-of-Sale Systems
Remote Access Servers
Storage Network Management
Factory Automation and Process Control
www.DataSheMet4uUlt.ic-poomrt RS-232/RS-422/RS-485 Cards
FIGURE 1. BLOCK DIAGRAM OF THE XR17V354
FEATURES
Single 3.3V power supply
Internal buck regulator for 1.2V core
PCIe 2.0 Gen 1 compliant
x1 Link, dual simplex, 2.5Gbps in each direction
Expansion bus interface
EEPROM interface for configuration
Data read/write burst operation
Global interrupt status register for all four UARTs
Up to 25 Mbps serial data rate
16 multi-purpose inputs/outputs (MPIOs)
16-bit general purpose timer/counter
Sleep mode with wake-up Indicator
Four independent UART channels controlled with
16550 compatible register Set
256-byte TX and RX FIFOs
Programmable TX and RX Trigger Levels
TX/RX FIFO Level Counters
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 programmable turn-around delay
Multi-drop with Auto Address Detection
Infrared (IrDA 1.1) data encoder/decoder
Software compatible to XR17C15x, XR17D15x,
XR17V25x PCI UARTs
TX+
TX-
RX+
RX-
CLK+
CLK-
CLKREQ#
PERST#
EN485#
E N IR #
EECK
EEDI
EEDO
EECS
D [7:0]
SEL
CLK
IN T
MODE
PRES
C o n fig u ratio n
Space
R eg isters
B uck R egulator
PInCtPIeCLr foIaeccael
Bus
In te rfa c e
C o n fig u ratio n
EREeSPgpiRascOt eeMr s
In te rfa c e
125 M H z C lo ck
G lobal
C onfiguration
R egisters
E xp an sio n
In te rfac e
16- b it
T im er/C o u n ter
UART Channel 0
UART
Regs
26546- - b y t e T X F IF O
TTXX && RR XX
IR
ENDEC
B R G 26546- - bbyyttee RRXX FFIIFFOO
UART Channel 1
UART Channel 2
U A R T C h a n n e l 32
UART Channel 3
UART Channel 5
UART Channel 6
M u lti-p u rp o se
IUnAp uRtTs /COhuatpn un tesl 7
- purpose
In p u ts/O u tp u ts
C rystal O sc/B uffer
TT XX [[ 37 :: 00 ]]
R X [3:0]
R X [7:0]
R TS#[3:0]
D T R #[3:0]
C T S #[3:0]
D S R #[3:0]
D C D #[3:0]
R I#[3:0]
M P IO [15:0]
TM RCK
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com

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