BCM3252KPBG Datasheet, PDF (2/2 Pages) Broadcom Corporation. – DUAL-CHANNEL FRONT-END DOCSIS 2.0+ STB IC WITH CHANNEL BONDING

US Out
DOCSIS
QAM In
Video
QAM In
IF In
PNP
1.2V
Vreg
2G Power
DAC Array
OVERVIEW
PNP
27-MHz
Xtal
Serial
Flash
SPI
IEEE
802.3u
USB 2.0
PCI/EBI
Isolation
2.5V
Vreg
Clock
Generation
Test Mux
Modulator
QPSK-
256 QAM
Demodulator
16–1024QAM
Demodulator
16–1024 QAM
Out-of-Band
Demodulator
500-MHz RBUS
TX Conv
Module
DOCSIS
2.0+ MAC
with
Channel
Bonding
Ethernet
PHY
Periph
Logic
Ethernet
MAC
USB 2.0 MPI PCI/EBI
16-KB
Boot ROM
Starvue
DAVIC
MAC
133-MHz UBUs
UBUS Arbiter
FPM with
32-KB
SRAM
16-KB TO
32-KB TI
ICache
16 KB
DCache
300-MHz
4350-CMT
MIPS Core
Dual-Threaded
MMU + Dual
MAC
UBUS BIU
133-MHz
16-bit DDR
Controller
MPEG out
133-MHz
16-bit DDR
(DDR266)
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.
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.
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 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
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
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 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 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
© 2007 by BROADCOM CORPORATION. All rights reserved.
3252-PB02-R
12/05/07
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com