XR17V354IB-E4-EVB Datasheet, PDF (1/67 Pages) Exar Corporation – HIGH PERFORMANCE QUAD PCI-EXPRESS UART

XR17V354
HIGH PERFORMANCE QUAD PCI-EXPRESS UART
APRIL 2015
REV. 1.0.4
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 independent enhanced
16550 compatible UARTs. The V354 is compliant to
PCIe 2.0 Gen 1 (2.5 GT/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
31.25 Mbps. 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
 Multi-port 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, 2.5 Gbps in each direction
 Expansion bus interface
 EEPROM interface for configuration
 Data read/write 32-bit operation
 Global interrupt status register for all four UARTs
 Up to 31.25 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 _fIoaeccael
Bus
In te rfa c e
C o n fig u ratio n
E_RE_eSP_gpiR^ascO_{t ee}M_{r 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 terface
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 • [phone] • FAX [phone] • www.exar.com