bcm5773 ETC-unknow, bcm5773 Datasheet - Page 2

• Manufacturer Part Number: bcm5773
• Description: 8-port Sata-ii Raid-on-chip Roc
• Manufacturer: ETC-unknow

The BCM5773 is a complete SATA-II RAID-on-Chip (RoC) solution
that significantly reduces CPU utilization and system design complexity
and time. In addition to integrating all hardware necessary to implement
high-performance RAID and multiport SATA connectivity, it also
integrates a complete RAID Stack that runs on the internal MIPS
processor, representing a complete subsystem solution that can be easily
integrated into a server or external storage system.
The device communicates with the host using one of two flexible
options: a x4 PCI-Express interface, or a PCI-X1.0 interface. A bridging
option between the PCI-E and PCI-X interfaces enables extra PCI-X
slots to be available for I/O expansion when the PCI-E interface is used
as a host interface to the BCM5773. It attaches directly to eight SATA-
II disk drive backplanes via a high-performance, integrated SATA PHY
that is capable of driving long-length backplanes. Hot-Plug capability is
also supported, enabling drives to be inserted/removed without affecting
system operation.
A high-bandwidth host arbiter (1 GB/s) decouples the host interface from
the SATA ports and embedded processor, enabling maximum
throughput for workloads demanding sequential I/O performance.
During a WRITE Operation, Data moves from host memory to the local
memory via the QDMA engine embedded in the memory controller unit
(MCU). An XOR operation is then (optionally) applied to the data within
Broadcom
or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the
property of their respective owners.
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5773-PB01-R
GbE
®
, the pulse logo, and Connecting everything
ISCSI Stack
External SATA Interface
5706
5706
10/08/04
External Storage System
BCM5773
BCM5773
Memory
PCI-X Bus
®
BCM5773
BCM5773
Memory
RAID Stack
®
are trademarks of Broadcom Corporation and/
BCM5773 Applications
O V E R V I E W
the MCU, after which the data is then written to the SATA drives via
high-performance QDMA engines embedded in the SATA ports.
During a READ Operation, the SATA QDMA engine can move the data
from the drives to either local memory (READ caching) or directly to
host memory (uncached).
The BCM5773 provides an interrupt coalescing mechanism to pace the
host interrupts it generates. This allows host software to batch-process
interrupts efficiently. In addition, the BCM5773 also incorporates a
mechanism to reduce IO reads by periodically DMAing the BCM5773
Status Block into host memory. Both of these mechanisms vastly reduce
the host CPU utilization by limiting the amount of adaptor accesses that
must be performed
A Low Pin Count (LPC) Interface Specification 1.0 compliant interface
is available to connect the BCM5773 to an external flash/ROM. Four
pins are used to implement an SGIO interface for drive activity and
general-purpose I/O. Dual I
communicate with an external enclosure management device or a Serial
EEPROM.
Built-in PRBSs or pseudo-random bit sequence test generators/checkers
are available per-port for PHY testing without the use of additional
hardware or drives. These are programmed from the in-band PCI-X or
PCI-E interfaces.
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
Processors
Controller
Southbridge
Memory
Memory
Controller
Memory
Server Storage
2
C interfaces running is also available to
PCI-E
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com
BCM5773
SATA
BCM5773
RAID
RAID
PCI-X