© 2007, Conexant Systems, Inc. All Rights Reserved. Conexant and the Conexant

logo are registered trademarks of Conexant Systems, Inc. All other trademarks

are owned by their respective owners. Although Conexant strives for accuracy

in all its publications, this material may contain errors or omissions and is

aNy exPress or ImPlIeD warraNTIes, INcluDINg mercHaNTabIlITy, fITNess for a

ParTIcular PurPose aND NoN-INfrINgemeNT.

Conexant shall not be liable for any

special, indirect, incidental or consequential damages as a result of its use.

Features

• PCI Express 1.0a compliant

• Worldwide audio and video decoding

• Automatic video and broadcast audio standard detection

and configuration

• Flexible video input MUX supporting composite, S-Video,

and component inputs with integrated anti-alias filtering

• Integrated sigma-delta stereo audio ADCs with 4:2 MUX

• Audio sample-rate converters on all inputs and outputs

• Two MPEG transport stream ports — serial or

parallel interfaces

• Support for the following audio formats: stereo, mono,

dual language (mono), tri language (Trivox)

• Two program stream inputs — serial or parallel interfaces

• Two I2C master ports (two ports are required for a

two-tuner design to isolate I2C transactions to reduce noise)

• Macrovision 1.0 detection compliant

• Programmable Vertical Blanking Interval (VBI) data slicer for

data services such as closed caption, Wide Screen Signaling

(WSS), Gemstar 1x and 2x, and program guides

• Infrared transmitter and receiver logic

• High-quality multi-tap horizontal and vertical image scaler

for decoded video or 4:2:2 sources

• ITU-R BT.656 input port

• ITU-R BT.656 output port

• I2S in (line-in audio)

• I2S out

• Auxiliary Phase Locked Loop (PLL) clock for general use

07-2676

Video

PCI Express Video Decoders

Serial TS/PS

Input Port

Clock, Data,

Start, Valid

Clock, Data[7:0],

Start, Valid

Clock, Data,

Start, Valid

Parallel TS/PS Input

Port or BT.656/VIP1.1

Input or Output

Serial TS/PS Input

Port or BT.656/VIP1.1

Input or Output

SCL{1}

SDA{1}

SCL{2}

SDA{2}

x1

PCI

Express

Audio

Master

Clock

Single Crystal

Frequency

16 to 24-Bit

32, 44.1, 48.

96 kHz

RS 232

GPIO x24

3 CVBS,

Luma,

Chroma,

SIF, or

Pb Inputs

2 CVBS,

Luma,

Chroma,

SIF, or

Pr Inputs

L/R 1

Audio In

L/R 2

Audio In

3 CVBS

or

Luma

Inputs

18-Bit

Audio

ADCs

Analog

Front End

CH 2

Analog

Front End

CH 1

10-Bit

Video

ADC

ColorSpace

Converter and

Formatter

Video

Decoder

NTSC/PAL/

SECAM

Color Space

Converter

and

Formatter

RISC Engine

and

DMA Controller

SRAM Butters

GPIO

UART

Serial Audio

In/Out

I2C Master 1

I2C Master 2

PCI

Express

TL

DLL

MAC

x1

PCI

Express

PHY

L/F

System

PLL

Aux/Audio

PLL

Video

PLL

Crystal

Amplifier

Analog

Front End

CH 3

10-Bit

Video/SIF

ADC

Audio

Decoder

BTSC/EIAJ/

A2/NICAM/

AM

Baseband

Audio

Vol/Tone/

Balance/Mute

3

2

CX23885 Block Diagram

www.conexant.com

General Information:

U.S. and Canada: (888) 855-4562

International: (732) 345-7500

Headquarters

4000 MacArthur Blvd.

Newport Beach, CA 92660

Doc# PBR-200865

Conexant Product Portfolio

The company’s broad portfolio of semiconductor products also includes client-side DSL, cable, and dial-up modem solutions; fiber optic system-on-

chips; broadcast video encoders and decoders; digital set-top box components and systems solutions; and IEEE 802.11a/b/g/n-compliant WLAN

chipsets. Additional products include a complete line of asymmetric and symmetric DSL central office solutions, which are used by service providers

worldwide to deliver broadband data, voice, and video over copper telephone lines.