BCM8422 Product Brief

BCM8422
®
4-CHANNEL 1/2/4G FIBRE CHANNEL INTELLIGENT LOOP CIRCUIT/
DUAL RETIMER/REPEATER WITH EYEOPENER®
SUMMARY OF BENEFITS
FEATURES
• Four-channel loop circuit to configure Fibre Channel hard
disk drives in FC-AL configurations
• Low-cost backend solution for Fibre Channel disk drive
arrays
®
• Dual-channel retimer/repeater with EyeOpener exceeding
Fibre Channel signalling specifications
• Guarantees jitter and bit-error-rate performance on optical
and fiber links
• Multirate support for new and legacy systems
• Supports legacy 1.0625G and 2.125G applications and new
• Active signal integrity (Active-SI) monitors physical layer and
active link integrity (Active-LI) monitors link-layer
performance
• Programmable transmit output levels and receive LoS
detection
• High-performance receive equalization and programmable
transmit pre-emphasis
• Per-channel link LED drivers for valid Fibre Channel frames
and speed detection
• Developed using advanced 0.13μ CMOS process technology
4.25G data rates off a single reference clock frequency
• On-chip intelligent diagnostics provides insight to the signal
quality with detection and recovery mechanisms on each
high-speed link
• Optimizes channel performance for lower power and signal
detection through an on-chip 2-wire control interface
• Transmits and receives over long distances of copper cables or
backplanes with 16 levels of programmable pre-emphasis
• Provides visual indications on PCBs for link status and
1.0625G, 2.125G, or 4.25G data rate transmissions
• Low power design of ~1.5W with small footprint package in a
13-mm x 13-mm BGA, with 1-mm ball pitch
4-Channel/EyeOpener® Functionality
Host 1
Loop 1
RDN/P0
TDN/P0
RDN/P1
TDN/P1
BCM8422
BCM8422
RDN/P2
4-Channel
Loop Circuit
Host 2
TDN/P2
Dual EyeOpener
Mode
Loop 2
RDN/P3
TDN/P3
OVERVIEW
I1
O2
CDR
Active SI
Active LI
O1
I2
CDR
I0
O3
CDR
PBERT
O0
I3
CDR
BCM8421
PLL
Logic Control
Fref (106.25-MHz)
2-Wire Serial Interface
Power
1.2V
3.3V
BCM8422 Block Diagram
The BCM8422 is an intelligent backend Fibre Channel loop circuit that
facilitates the implementation of an intelligent bunch of disks (IBOD) on
Fibre Channel storage array systems. The BCM8422 can also be
configured as a dual retimer/repeater with EyeOpener® device designed
to drive optical and copper ports in Fibre Channel applications.
Each port of the BCM8422 can be independently configured as a retimer
or repeater operating at the Fibre Channel data rates of 1.0625 Gbps,
2.125 Gbps, and 4.25 Gbps. With an on-chip low-jitter phase locked loop
(PLL), the BCM8422 exceeds Fibre Channel signal quality
specifications.
The BCM8422 features Active-SI, which allows monitoring of the
received signal at each high-speed port to determine signal eye quality
and bit error rate (BER) for system diagnostics, fault isolation, optics
aging, and maintenance. An on-chip pattern generator/checker is
provided with internal loopback capability on each I/O port.
The BCM8422 also features Active- LI, which is a set of advanced link
integrity functions performing data generation and checking transmitted
Fibre Channel data. The combination of Active-SI and Active-LI
improves storage system’s reliability, availability, and serviceability
(RAS) with the ability to monitor and diagnose system integrity.
Data from each port can be optionally retimed using an elastic FIFO and
local crystal reference clock, eliminating jitter transfer. The BCM8422
can also be configured to operate in repeater mode for low latency.
The BCM8422 is available in a 13-mm x 13-mm BGA package.
Broadcom®, the pulse logo, Connecting everything®, the Connecting everything logo, and
EyeOpener® are among the trademarks of Broadcom Corporation and/or its affiliates in the United
States, certain other countries and/or the EU. Any other trademarks or trade names mentioned are the
property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2006 by BROADCOM CORPORATION. All rights reserved.
8422-PB01-R
04/14/06
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com