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XRS10L210 Datasheet(PDF) 1 Page - Exar Corporation

Part # XRS10L210
Description  SERIAL ATA II: PORT SELECTOR
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRS10L210 Datasheet(HTML) 1 Page - Exar Corporation

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
EXSTOR - 1 XRS10L210
SERIAL ATA II: PORT SELECTOR
DECEMBER 2008
REV. 1.04
FEATURES
GENERAL FEATURES
Three independent 3/1.5Gbps SATA ports.
Connects 2 host ports to 1 device port.
Supports 3/1.5Gbps rate detection/speed
negotiation.
Supports power down modes - Active, partial,
slumber and power down.
Advanced features configurable through MDIO
bus.
PORT MULTIPLIER/SELECTOR LOGIC FEATURES
Low latency architecture.
Supports OOB signaling for SATA applications.
Internal
OOB
detectors
for
COMRESET/
COMINIT and COMWAKE.
HIGH SPEED I/O FEATURES
High speed outputs with programmable pre-
emphasis to drive long interconnects.
Selectable high speed input equalization for
optimum reception.
Compliant with SATA Gen-2i & Gen-2m
specification.
Enables reliable data transmission over 1 meter
of FR-4 and 4 meters or more of unequalized
copper cable.
Supports spread spectrum clocking (SSC) to
reduce EMI.
PHYSICAL FEATURES
CMOS 0.13 Micron Technology
Single 1.2 V Power Supply
-40°C to 85°C Industrial Temperature Range
No heatsink or airflow required
64-QFN and 100-Pin LQFP Package
1.0
INTRODUCTION
The XRS10L210 is a Serial ATA II Port Selector at 3.0
Gbps and 1.5 Gbps. It provides a failover path from
two independent hosts to a single SATA drive and
offers a leading solution for propagation of high data
rate Serial ATA products in a wide variety of
applications. The integration of Serial ATA PHY links,
a variety of digital logic capabilities, rate adjust
FIFOs, integrated low-cost clock oscillator support,
test and loopback features is achieved in a low cost
and lower power implementation.
The port selector function is used when dual hosts,
such as I/O controllers, must access single-port disk
drives in high availability storage subsystems where
redundancy and load sharing are important. The
outputs from the I/O controllers are multiplexed to a
Serial ATA drive through the port selector block of the
XRS10L210.
Active/passive
port
selector
in
XRS10L210 allows two different host ports to connect
to the same target in order to create a redundant path
to that target. In combination with RAID, the
XRS10L210 allows system providers to build fully
redundant solutions. This avoids the presence of a
single point of failure, and enables a fail-over path in
the case of host failure.
The XRS10L210 includes enhanced features such as
staggered HDD spin-up, power management control,
hot plug capability and support for legacy software.
The XRS10L210 acts as a retimer, maintaining
independent signaling domains between the drives,
hosts and the external interconnect.
The high-speed serial input feature:
selectable
equalization adjustment and the high-speed serial
output feature: programmable pre-emphasis can be
used
to
compensate
for
ISI
(Inter-Symbol
Interference) and increase maximum cable distances.
XRS10L210 meets tight jitter budgets in SATA
applications. Exar's serial I/O technology enables
reliable data transmission over 1 meter of FR-4 and 4
meters of unequalized copper cable.
Host and drive port speeds can be mixed and
matched, based upon inherent data rate negotiation
present in the SATA II specifications.
The MDIO bus allows simple configuration of the
XRS10L210 when needed.
Receive equalization,
transmit amplitude and pre-emphasis and SSC
control are all configurable via the 2-wire MDIO
interface.
To summarize, the port selector functionality in the
XRS10L210 allows replacement for expensive Fibre
Channel drives with cost effective and high capacity
SATA drives in enterprise class applications without
compromising on redundancy or performance.


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