BCM3252KPBG [BOARDCOM]
DUAL-CHANNEL FRONT-END DOCSIS 2.0 STB IC WITH CHANNEL BONDING; 利用信道绑定双通道前端DOCSIS 2.0机顶盒IC
| 型号： | BCM3252KPBG |
| 厂家： | 
Broadcom Corporation. |
| 描述： | DUAL-CHANNEL FRONT-END DOCSIS 2.0 STB IC WITH CHANNEL BONDING |
| 文件： | 总2页 (文件大小：286K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
BCM3252
®
Brief
®
DUAL-CHANNEL FRONT-END DOCSIS 2.0+ STB IC WITH
CHANNEL BONDING
S U M M A R Y O F B E N E F I T S
F E A T U R E S
Dual QAM in-band demodulators
The BCM3252 provides a complete front-end solution for next-
generation set-top box products. North America and
international markets enable a single design to be deployed on
a worldwide basis.
•
•
•
Out-of-band (OOB) demodulator for support of DVS-178 and
DVS-167
800DMIPS dual-threaded R4K MIPS processor
•
•
Able to support IP video data rates at up to 80 Mbps, allowing
for future transition to an all IP network.
•
•
®
DOCSIS /EuroDOCSIS™ 2.0+ including DSG and channel
bonding
Software switchable from broadcast (video channel
configuration) to channel bonding, enabling in field-network
configuration transitions.
®
DOCSIS and channel bonding code supplied by Broadcom
•
•
•
•
•
DAVIC MAC
High-performance processor capable of supporting DOCSIS/
EuroDOCSIS 2.0+, channel bonding, and other network-
centric applications.
•
USB 2.0 MAC and PHY (full data rate USB supported)
PCI
Boot from unified back-end Flash (i.e., Flash connected to
BCM7038, BCM7400, BCM7401, or BCM7402)
OOB provides support for existing OOB channels that are
used today. Facilitates move to DSG and DOCSIS.
•
•
Ethernet MAC and PHY
•
•
USB 2.0, PCI, and Ethernet make for flexibility in connection
to back-end devices, BCM7038, BCM7400, BCM7401, and
BCM7402.
BOM savings include integrated regulators, VCX0, and
upstream amplifier
BOM savings resulting from integration enable lower overall
set-top box cost.
•
•
IPv6 supported
•
Broadcom-supplied code for channel bonding and DOCSIS
enables quick time-to-market.
Basic Interactive DOCSIS 2.0+/DSG HD Set-Top Box Block Diagram
Stereo Audio Out
YPbPr Out
S/PDIF Out
Video Out
Dual
USB 2.0
Opt.
Firewire
Cable
RF Out
HDMI Out
Power
Audio
Out
HDMI/DVI
Out
S/PDIF
Out
NTSC/
Video
Comp.
Video
RF
Mode
DDR
SDRAM
8 MB
Diplexer
(Opt.)
1394
MAC/PHY
USB 2.0
DDR
SDRAM
200 MHz
256 MB
x64
MII
Optional
BCM3420
BCM3420
TS In
TS In
PCI
BCM7402
HD AVC
VC-1
Sec. up/CA
BCM3252
DOCSIS® 2.0+
800DMIPS
MOCA
HomePlug AV
IEEE 802.11g,n
Flash
32Mx8
IR & UHF I/F
OpenCable™
CableCARD™
O V E R V I E W
IEEE
802.3u
USB 2.0
Isolation
PCI/EBI
27-MHz
Xtal
Serial
Flash
PNP
PNP
SPI
1.2V
Vreg
2.5V
Vreg
Clock
Generation
Ethernet
PHY
Test Mux
Modulator
QPSK-
256 QAM
500-MHz RBUS
2G Power
DAC Array
Periph
Logic
Ethernet
MAC
16-KB
Boot ROM
US Out
USB 2.0
MPI PCI/EBI
TX Conv
Module
DOCSIS
QAM In
Demodulator
16–1024QAM
133-MHz UBUs
DOCSIS
2.0+ MAC
with
Channel
Bonding
UBUS Arbiter
Video
QAM In
Demodulator
16–1024 QAM
16-KB TO
32-KB TI
ICache
300-MHz
4350-CMT
MIPS Core
Dual-Threaded
MMU + Dual
MAC
UBUS BIU
Starvue
DAVIC
MAC
FPM with
32-KB
SRAM
133-MHz
16-bit DDR
Controller
16 KB
DCache
Out-of-Band
Demodulator
IF In
133-MHz
16-bit DDR
(DDR266)
MPEG out
BCM3252 Block Diagram
Broadcom’s ICs provide the solution for the next-generation interactive
DOCSIS 2.0+, DSG HD AVC set-top box. The main sections include a
front end (tuners, QAM, and DOCSIS), addressed by the BCM3420 and
BCM3252, and a back end (HD AVC/VC-1/MPEG2 decoding, audio
decode, HDMI, and peripherals, etc.), addressed by the BCM7402.
via software, making the BCM3252 ideal for networks that will move to
channel bonding in the future.
Broadcom’s latest CMOS tuner, the BCM3420, addresses the low power
needs of set-top boxes and extends the range of tuning up to 930 MHz.
The BCM7402 is a single HD AVC/VC-1/MPEG2 decoder with
graphics subsystem. It contains a MIPS32 processor dedicated to
The BCM3252 IP Video Pipeline IC provides the integrated front-end
solution for high-end set-top boxes. It has a high-performance processor
that can address the tasks of DOCSIS 2.0+, channel-bonding
resequencing, and network protocols such as TCPIP, UPnP, and IPv6.
The BCM3252 is both DOCSIS- and EuroDOCSIS-certified.
®
applications and OS. Included in the BCM7402 are integrated video
amps, MAC and PHYs for USB 2.0, USB 1.1, 10/100 Ethernet, flexible
audio core supporting today's major audio codecs, and other next-
generation set-top box features. The BCM3252/BCM7402 systems also
support a single unified Flash for reduced component BOM and systems
cost savings. A full 80-Mbps IP video stream is supported in channel
bonding mode in the BCM3252/BCM7402 set-top.
The OOB and upstream modulator of the BCM3252 conforms to the
DVS-167, DVS-178, and DOCSIS standards. The GPIO on the
™
BCM3252 can be configured to output CableCARD signals, which
connect directly to the CableCARD socket.
The BCM3252 and BCM3420, along with the BCM7402, provide the
solution for the next-generation basic interactive DOCSIS 2.0+/DSG HD
AVC set-top box products, meeting the requirements for US cable
operators and international operators alike.
The BCM3252 supports both the individual program channel mode (up
to two video channels) and the channel-bonded mode (up to two
DOCSIS channels). These modes can be switched from one to the other
The BCM3252 is in volume production today.
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
Phone: 949-926-5000
Fax: 949-926-5203
E-mail: info@broadcom.com
Web: www.broadcom.com
© 2007 by BROADCOM CORPORATION. All rights reserved.
3252-PB02-R
12/05/07
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