OVERVIEW

®

Phone: 949-450-8700

Fax: 949-450-8710

E-mail: info@broadcom.com

Web: www.broadcom.com

BROADCOM CORPORATION

16215 Alton Parkway, P.O. Box 57013

Irvine, California 92619-7013

© 2006 by BROADCOM CORPORATION. All rights reserved.

7452-PB00-R

12/20/06

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.

BCM7452 Block Diagram

The BCM7452 is a high-definition satellite, cable, and IP set-top box DVR

solution offering integrated AVC (H.264/MPEG-4 Part 10), MPEG-4 Part 2,

MPEG-2, DivX (3.11, 4.11, 5x), and VC-1 video decoding technology. It

combines a data transport processor, high-definition/standard-definition

AVC/MPEG-2/VC-1 video decoder, advanced-audio decoder, 2D graphics

processing, high-quality video scaling and motion adaptive deinterlacing, six

video DACs, stereo high-fidelity audio DACs, a MIPS32/MIPS16e™ class

CPU, and a peripheral control unit providing a variety of set-top box control

functions.

The MPEG-2 DVB-compliant transport stream/PES parser and

demultiplexer is capable of simultaneously processing 256 PIDs via 128 PID

channels in up to five independent external transport stream inputs and two

internal playback channels. All 128 PID channels can be used by the record,

audio, and video interface engine (RAVE), PCR processing, message filter,

and for output via the high-speed transport or remux module. The data

transport module can be configured to support eight record channels for PVR

functionality and six AV channels to interface to audio and video decoders.

The transport provides 1DES/3DES/DVB/Multi2/AES descrambling

support. A memory-to-memory DMA security module may be programmed

for supporting AES/1DES/3DES/CSS/CPRM/CPPM/DTCP copy protection

algorithms/standards. The BCM7452 features the Broadcom secure

processor providing secure key generation, management, and protection.

An advanced video decoder is featured in the BCM7452 capable of

supporting high-definition AVC, VC-1, and MPEG-2 streams. AVC support

is for main- and high-profile to level 4.1 for 720p and 1080i high-definition

decode support or to level 3.1 for standard definition streams. AVC high

profile was added to the fidelity range extensions specifically to address the

needs of consumer broadcast and playback applications.

Tools include additional transform sizes and spatial prediction modes and

support for adaptive quantization matrix. The video decoder also supports

high-definition VC-1 (advanced-profile level 3, main, and simple profiles)

and MPEG-2, main profile at main and high levels. The BCM7452 has an

advanced audio processor capable of decoding Dolby Digital, Dolby Digital

Plus, AAC 5.1, AAC+ level 2, and MPEG 1 layers 1, 2, and 3 with

simultaneous pass-through support. 3D SRS audio is also supported.

High-quality video and graphics processing is integrated, featuring advanced

studio quality 2D graphics processing. Also included are motion-adaptive

deinterlacing with 3:2 pulldown, and letterbox detection. Digital noise

reduction minimizes mosquito noise and MPEG artifacts, including block

noise.

The BCM7452 has a dual-stream analog video encoder with Macrovision

that supports the following output standards: NTSC-M, NTSC-J, PAL-

BDGHIN, PAL-M, and PAL-Nc. The following output formats are

supported: composite, S-Video, SCART, RGB, and YPrPb component. The

following output resolutions are supported: 480i, 480p, 576i, and 576p. Six

output video DACs are available to be shared among the output functions.

The BCM7452 also supports output over an HDMI interface. An ITU-R-656

output port is also available with teletext sideband.

The BCM7452 incorporates a complete MIPS32™-based microprocessor

subsystem, including caches with bridging to memory and a local bus.

Integrated peripherals include three UARTS, two ISO7816 smart card

interfaces, counter/timers, a GPIO, a LED/keypad controller, IR receivers, an

IR blaster, an integrated soft modem system side device, and BSC and SPI

controllers. Advanced connectivity features include two USB 2.0/1.1 ports,

an additional independent USB 1.1 port, and an Ethernet port with MAC with

integrated PHY and alternate media independent interface (MII).

Dual

Composite

NTSC/PAL

VEC with 6

DACs

300-MHz

MIPS32/16e

32KI and 32KD

MMU, 4K RAC

PCM

Audio

Engine

and

DACs

Bus Bridge

DRAM Controller

RMX

x2

ISO7816 I/F

x2

ITU-R-656

Decoder

USB 2.0 x2

USB 1.1

Secure Processor

O

T

P

R

O

M

Soft Modem,

Si305X,

Ethernet

10/100BASE-T

Video

- Scalers

- Compositors

- Digital noise

reduction

- Delinterlacing

IR RX

Triple

UARTs

DMA

USB

1.1

Advanced

2D Graphics

Display

Engine

Multiformat

Audio

Processor

HD/SD

AVC/MPEG-2/

MPEG-4/DivX

Video Decoder

IR In x2

IR TX

IR Out

GPIO

GPIO

L

R

SPDIF

SD Video

ITU-R-656/TTX

HDMI

Gateway

Services

SCARD

MCARD

ITU-R-656

PCI 2.2 and Flash

64-bit

DDR-SDRAM

BSC

BSC x4

UARTx3

Dual

USB

2.0

Dual

PVR

Engine

w/Trick

Modes

MPEG-2/DVB Transport

Transport

Input x5

DCAS