PRELIMINARY
JULY 2009
XR17V352
REV. P1.0.1
HIGH PERFORMANCE DUAL PCI EXPRESS UART
GENERAL DESCRIPTION
The XR17V352
1
(V352) is a single chip 2-channel
PCI Express (PCIe) UART (Universal Asynchronous
Receiver and Transmitter), optimized for higher
performance and lower power. The V352 serves as a
single lane PCIe bridge to 2 indepedent enhanced
16550 compatible UARTs. The V352 is compliant to
PCIe 2.0 Gen 1 (2.5GT/s).
In addition to the UART channels, the V352 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 V352 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 V352 is available in a 113-pin STBGA
package (9 x 9 mm).
N
OTE
1:
Covered by U.S. Patents #5,649,122, #6,754,839,
#6,865,626 and #6,947,999
FEATURES
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Single 3.3V power supply
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Internal buck regulator for 1.2V core
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PCIe 2.0 Gen 1 compliant
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x1 Link, dual simplex, 2.5Gbps in each direction
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EEPROM interface for configuration
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Data read/write burst operation
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Global interrupt status register for both UARTs
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Up to 25 Mbps serial data rate
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16 multi-purpose inputs/outputs (MPIOs)
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16-bit general purpose timer/counter
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Sleep mode with wake-up Indicator
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Two independent UART channels controlled with
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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
APPLICATIONS
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Next generation Point-of-Sale Systems
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Remote Access Servers
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Storage Network Management
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Factory Automation and Process Control
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Multi-port RS-232/RS-422/RS-485 Cards
F
IGURE
1. B
LOCK
D
IAGRAM OF THE
XR17V352
TX+
TX-
RX+
RX-
CLK+
CLK-
CLKREQ#
RST#
C o n f ig u r a t io n
S pace
R e g is t e r s
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Software compatible to XR17C15x, XR17D15x,
XR17V25x PCI UARTs
B u c k R e g u la to r
U AR C annel
U A R TT C hh a n n e l00
6 4 - b y t e T X F IF O
U A R T 2 5 6 -b y t e T X F IF O
IR
UART
R egs
TX & R X
ENDEC
R eg s
IR
ENDEC
TX & R X
B R G 6 4 - b y t e RE N F IF O
X DEC
BRG
2 5 6 - b y t e R X F IF O
T X [1 :0 ]
T X [7 :0 ]
R X [1 :0 ]
R X [ 7 :0 ]
R T S # [1 :0 ]
1 2 5 M H z C lo c k
P C Ie
PC I Local
In t e r f a c e
Bus
In te r fa c e
G lo b a l
C o n fig u r a tio n
R e g is te r s
D T R # [1 : 0 ]
C T S # [1 :0 ]
EN 485#
E N IR #
EECK
EEDI
EEDO
EECS
U AR T C hannel 2
U A R T C hannel 1
UART
R egs
2 5 6 -b y t e T X F IF O
TX & RX
D S R # [1 :0 ]
C o n f ig u r a t io n
Spa
O
E E P R
c e
M
R e g is t e r s
IR
In te r fa c e
U A R T C h a n
E N D E C
nel 5
B R
U A R
5 6 -
C
y t
a n n e l
IF O
G 2
T
b
h
e RX F
6
D C D # [1 :0 ]
M u lti- p u r p o s e
R I# [ 1 : 0 ]
11 6- b it
6-
TT im e /C oo u n te r
im e r r /C u n te r
In p u t s /O u tp u t s
-
In p u ts /O u t p u t s
C r y s ta l O s c /B u ff e r
M P IO [ 1 5 : 0 ]
TM RCK
Exar
Corporation 48720 Kato Road, Fremont CA, 94538
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(510) 668-7000
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FAX (510) 668-7017
•
www.exar.com
EXAR [ EXAR CORPORATION ]
