BCM84823
®
Brief
SUMMARY OF BENEFITS
•
Simplifies system and board design
•
Reduces PCB space
•
Lowers system bill of materials (BOM)
•
Provides interoperability with IEEE standard devices
operating at 10 Mbps, 100 Mbps, 1000 Mbps, and 10 Gbps
•
Compatibility with industry standard Ethernet MACs
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Flexibility for copper or fiber applications
•
Reduces system design constraints to meet EMI emissions
standards
•
Cable diagnostic function characterizes cable plant condition
and immediately indicates cabling issues.
•
Operates with larger packets for wider range of packet
protocol support and improved efficiency
•
Ease of manufacturing with JTAG support and simplified
power supply
TWO-PORT 10GBASE-T TRANSCEIVER
FEATURES
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Fully integrated two-port 10GBASE-T Ethernet transceiver
•
Supports lower speeds: 10BASE-T, 100BASE-TX, 1000BASE-T
•
XFI, XAUI™, and SGMII MAC interface options
•
Compliant with IEEE 802.3™, 802.3an, 802.3ab, and 802.3u
standards
•
“Auto grEEEn" mode enables energy efficient network
deployment
•
Support for 100m operation with a 30m low-power mode
•
On-chip low-voltage regulators
•
Line-side loopback mode
•
Low electromagnetic interference (EMI) emissions
•
Cable plant diagnostics
•
Detection and correction of pair-swaps (MDI crossover),
pair skew, and pair polarity
•
Support for jumbo packets up to 18 KB
•
IEEE 1149.1 (JTAG) boundary scan
•
576-pin FBGA 25 mm x 25 mm package
General 10-Gigabit Ethernet Connectivity
SGMII
XAUI
XFI
MDI
Transformer
RJ-45
MAC
Controller
or
Switch
SGMII
XAUI
XFI
BCM84823
MDI
Transformer
RJ-45
OVERVIEW
BCM84823 [Port 1]
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+
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RD[1]
TD[1]
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+
-
XFI™
Interface
XAUI/1000BASE-X/
100BASE-FX
Interface
XAOL/SOL[1]
XBOL[1]
XCOL[1]
XDOL[1]
XAIL/SIL[1]
XBIL[1]
XCIL[1]
XDIL[1]
XAOM/SGO[1]
XBOM[1]
XCOM[1]
XDOM[1]
XAIM/SGIM[1]
XBIM[1]
XCIM[1]
XDIM[1]
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Frame
Scramble
LDPC
Encode
4D DSQ
128 Map
4D Pre H
Decode
4D DAC
XAUI™/SGMII
MAC
Interface
Deframe
and
Descramble
LDPC
Decode
4D DSQ
128 Soft
Decisions
Matrix
Xtalk
Canceller
and
Equalizer
4D Clock
Recovery
TRD[1][0:3]
4D ADC
BCM84823 [Port 2]
MDC
-
MDIO
SI
SCK
CSb
SO
MDIO
Management
Interface
MII
Registers
LED
Controller
10 LEDs
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SPI
Clock
Generator
XTALN
XTALP
Shared Functions
BCM84823 Block Diagram for Each Port
The BCM84823 is a complete two-port 10/100/1000/10GBASE-T
solution operating at 100m over CAT6a or CAT7 unshielded twisted pair
(UTP) cable. It is based on highly advanced digital signal processor-
based architecture to allow robust operation over UTP wiring. It is a
highly integrated solution combining enhanced analog front ends with
digital adaptive equalizers, ADCs, phase-locked loops, line drivers,
LDPC encoders and decoders, echo cancellers, crosstalk cancellers, and
all required support circuitry.
The BCM84823 is optimized to enable switch, controller, and other
general 10-Gigabit Ethernet (GbE) connectivity applications. Each port
in the BCM84823 contains one XFI interface and two XAUI interfaces.
Any one of these interfaces can be connected on the MAC side or line
side. One of the four lanes on each XAUI interface is reserved to support
the SGMII interface, which offers lower speed 10/100/1000BASE-T
operation. This dual port enables customers to design high-density Top
of the Rack (ToR) switches and server NIC controllers for data center
applications.
The BCM84823 is another member of the Broadcom
®
65 nm
10GBASE-T PHY family, joining the BCM84821 to offer a single-port
or two-port option for various applications. The 65 nm process offers the
best performance, lowest cost, and lowest power for 10-Gigabit copper
solutions. Additionally, devices based on the 65 nm process offer an
excellent long-term cost curve, enabling better cost reduction over time
compared to older technologies, without having to redesign or requalify
a new part. AutogrEEEn support will reduce power significantly during
idle operation.
The BCM84823 incorporates various advanced features. A link quality
indicator LED provides instant notification of any problems with the
wiring plant operating at the desired speed. These problems include
physical wiring defects that the BCM84823 cannot automatically correct
and channel conditions such as excessive cable length and return loss,
crosstalk, echo, and noise. Broadcom cable analyzer software can be
used with the device to provide remote management of the cable and a
first level of diagnostics and fault isolation.
Broadcom
®
, the pulse logo,
Connecting everything
®
, and the Connecting everything logo 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
5300 California Avenue
Irvine, California 92617
© 2009 by BROADCOM CORPORATION. All rights reserved.
84823-PB00-R
10/09/09
Phone: 949-926-5000
Fax: 949-926-5203
E-mail: info@broadcom.com
Web: www.broadcom.com
Embedded System
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