BCM5402 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – DUAL PORT 10/100/1000 BASE T GIGABIT COPPER TRANSCEIVER

BCM5402 OVERVIEW
BCM5402 Block Diagram
TRD[3:0] + {1:2}*
XTALI
XTALO
RDAC{1:2}*
REGSUP{1:2}*
REGCNTL{1:2}*
REGSEN{1:2}*
TX DAC
16
Gain
Automatic
Control
PGA
ADC
Auto-
Negotiation
Clock
Generation
BIAS
Generation
Voltage
Regulator
Echo
Canceller
FFE
XTALK
Canceller
x3
DFE/
Trellis
Decoder
Timing &
Phase
Recovery
Symbol
Encoder
Symbol
Decoder/
Aligner
LED
Drivers
MII
Registers
MII
MGMT
Control
TXD[7:0]{1:2}*
TX_EN{1:2}*
TX_ER{1:2}*
GXT_CLK{1:2}*
TX_CLK{1:2}*
COL{1:2}*
CRS{1:2}*
RX_CLK{1:2}*
RX_DV{1:2}*
RX_ER{1:2}*
RXD[7:0]{1:2}*
LNK100{1:2}*
LNK1000{1:2}*
RCVLED{1:2}*
XMTLED{1:2}*
FDXLED{1:2}*
MDC
MDIO
INTR{1:2}*
MODES
*{1:2} Refers to the first and second Gigabit transceiver in the BCM5402
The BCM5402 consists of two complete 10/100/1000BASE-T
Gigabit Ethernet transceivers integrated on a single monolithic
CMOS chip in a 256-pin TBGA and 260FPBGA package. The
BCM5402 is optimized for low power and small footprint size
enabling high port density applications. The package dimension is
narrower than the width of two RJ-45 connectors to simplify board
layout and component placement.
This device represents the third generation of Gigabit Ethernet
transceivers based on the same field-proven architecture as in the
BCM5400 and BCM5401 transceivers. These devices have
proven robust operation over the installed base of CAT 5 twisted
pair wiring. The BCM5402 is fully software and register
compatible with the previous BCM5400 and BCM5401.
The Digital Signal Processor based architecture and advanced
power management techniques combine to achieve robust and low
power operation over the existing CAT 5 twisted pair wiring.
Several special low power modes can be used to further reduce
power. Dissipating less than 600 mW per port, the wake-on-LAN
mode enables the BCM5402 to be used for adapters and in LAN-
on-motherboard (LOM) solutions for personal computers that meet
the stringent standby power requirements for PC’99 compliance.
industry-standard Ten Bit Interface (TBI), the BCM5402 also
supports the RGMII interface. RGMII is a reduced pin-count
(12 versus 25) version of the GMII utilizing standard ASIC
technology.
The BCM5402 is fully compatible with the IEEE 802.3 standard
for auto-negotiation of speed. Additionally, several Plug and Play
enhancements are added to make the device even more user-
friendly. A link quality indicator LED gives installers an instant
visual indication if there are any problems with the wiring plant
supporting operation at the desired speed. This includes physical
wiring defects that the BCM5402 cannot automatically correct
for and channel conditions such as excessive cable length, and
return loss, crosstalk, echo, and noise. Broadcom’s 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.
The Ethernet@WireSpeed^TM capability allows the BCM5402 to
auto-negotiate to the maximum data rate allowed by the cable
plant. This feature prevents failure to establish link because of
cable plant impairment at higher data rates.
Each port is fully independent and has individual interface,
control and status registers. In addition to supporting IEEE 802.3
Standard Gigabit Media Independent Interface (GMII), and
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BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2003 by BROADCOM CORPORATION. All rights reserved.
5402-PB02-R 06.25.03
Phone: [phone]
FAX: [phone]
Email: [e-mail]
Web: www.broadcom.com