Set-top Box Solutions
HDTV MPEG-2/H.264/VC-1 Video Decoder
with PVR Support
Conexant’s portfolio includes a comprehensive suite of semiconductor
solutions for broadband communications and the digital home.
Conexant’s CX24500 is a highly integrated, MPEG-2/H.264/VC-1, DIRECTV/
DVB® compliant, back-end decoder IC solution for high-definition digital TV
systems with support for personal video recorder (PVR) applications, which
can be deployed in digital satellite, cable, Telco or terrestrial TV networks.
The CX24500 features a flexible multi format video decoder capable
of decoding High Definition or Standard Definition programs in MPEG-2,
H.264 and VC-1 formats. The audio decoder supports multiple audio
format decoding, including MPEG-1, MPEG-2, Dolby® Digital, Dolby
Digital+. MPEG-4 aac and aacPlus™, WMA and WMA Pro. An integrated
ARM1176 CPU with 32K Instruction and Data cache supplies over
730 Dhrystone 1.2 MIPS at 550MHz, and a high performance 667 MHz 32-bit
DDR-2 SDRAM memory controller gives ample processing power for
advanced applications and future expansion capability. An additional 16-bit
DDR-2 SDRAM controller is also available for high performance applications.
Distinguishing Features
• DVB/DIRECTV® compliant back-end
HDTV decoder for worldwide markets
PVR functionality is supported by a multi-stream transport processor, based
• High-performance ARM1176 CPU with
32K I/D cache providing 730+ DMIPS
on a dedicated RISC engine, supporting eight simultaneous transport streams
• PVR support with dual eSATA-2 interfaces
(four from baseband inputs and four from DMA interfaces). The transport
• Integrated V.92 hardware modem
processor unit also supports DVB, DES, AES or Multi-II descrambling and
• Multiple OS support including Nucleus+,
VxWorks, Linux® and Windows® CE
contains hardware support for the NDS conditional access system. The
• MPEG-2, H.264 and VC-1 video decoder
CX24500 integrates two serial ATA2 controllers with support for internal and
• Advanced audio decoder with multiple
audio format support
external HDD attachment with 3DES/AES ciphering engines for encryption
of data to the HDD.
The CX24500 also features an impressive array of I/O features, including
HDMI v1.3 with HDCP, dual USB 2.0 host controller with integrated Phys,
an additional USB1.1 solution, dual integrated 10/100 Ethernet MAC with
MII, PCI bus and HomePlug® connectivity via a high-speed UART and
an integrated V.92 hardware modem. The CX24500 fully supports cable
applications when used in conjunction with the CX24450-CX24453
DOCSIS 2.0+ STB Front End IC, supporting an OpenCable™ Cable CARD™
M-Card™ interface.
• Advanced security features including
secure boot software authentication,
IC personalization via OTP memory, SVP
support and 3DES/AES ciphering engines
• HDMI v1.3 transmitter with HDCP
content protection
• High performance de-interlacer with 480i
or 1080i to480p/720p conversion
• Dual USB2.0
• OpenCable M-card support
Part Number CX24500
HDTV MPEG-2/H.264/VC-1 Video
Decoder with PVR Support
Set-top Box Solutions
For a complete HDTV hardware design, the only additional
The CX24500 IC is integrated into a fully engineered interactive
components required are a tuner, demodulator, double data rate
TV STB reference development system that implements third-
(DDR-2) synchronous dynamic random access memory (SDRAM),
party interactive middleware/real-time operating system (RTOS)
and flash memory ICs. This level of integration enables a low-cost
platforms and provides a complete set of STB low-level drivers.
system bill of materials and allows the flexibility of supporting
The STB development platform hardware is designed with a flexible
different modulation and compression technologies with a
architecture that supports multiple front end tuner/demodulator
low-cost, highly featured MPEG solution for dual TV set-top box
daughter boards. A mature and robust hardware abstraction layer
(STB) applications.
is assured by re-use of core driver libraries developed over multiple
generations of production MPEG ICs. Support for Nucleus+ and
Linux OS is included, with the software architected to allow easy
porting to other real-time OS.
Smart Card Reader
TS Inputs
IR Blaster
IR RCU Detect
System IC
or eSATA-2
L+R Stereo
or eSATA-2
CX24500 HDTV SoC System Diagram
Common Platform for Satellite, Cable, IP and Terrestrial STB
including QPSK, 8-PSK, DVB-S2, QAM, OFDM, 8-VSB, ADSL/VDSL,
manufacturers increasingly look to leverage a common hardware
802.3, 802.11a/b/g, Homeplug, MoCA® or IEEE 1394 through either
platform that can be reused over various broadband networks,
transport stream, MII or PCI interfaces. This provides a flexible STB
including satellite, cable, terrestrial, DSL, and Telco networks.
solution that can be targeted to a variety of broadband operators
Conexant’s CX24500 IC can serve as a common back-end platform
while minimizing hardware/software development costs.
that easily interfaces to a variety of broadband front ends,
CX24500 Product Features
• High-performance ARM1176 CPU with 32K I/D cache
supplying 730+ Dhrystone 1.2 MIPS at 550MHz
• 667 MHz 32-bit DDR-2 memory interface with
optional additional 16-bit DDR-2 interface for high
performance applications
• DIRECTV/DVB transport stream demultiplexing
• Six 10-bit video DACs
• Macrovision® 7.x copy protection with 525p/625p
optional support
• Advanced security features including secure boot SW
authentication, IC personalization via OTP memory,
and 3DES/AES ciphering engines
• Multi-standard transport processor with 3DES, AES and
Multi-II descrambling
• Secure video processor (SVP) support
• Transport stream processing capability supporting up
to 3 records and 2 playback streams simultaneously
• HDMI v1.3 transmitter with HDCP
• Supports MPEG-2 [email protected], [email protected] [email protected], [email protected]
• Supports H.264 [email protected] and [email protected]
• Supports VC-1 [email protected] and [email protected]
• Integrated DIRECTV security
• Dual USB2.0 host controllers with integrated Phys
• USB 1.1 controller and PHY
• NDS XTV and RASP PVR support
• Multi-plane video/graphics display controller
• Dual serial ATA-2 interface for internal or external
HDD attachment
• HD displays supports HD 1080p, 1080i and 720p
picture output with six-plane compositing
• Dual channel 10/100 Ethernet MAC with
overclocked MIIs
• Supports constrained HDTV image output on YPrPb
• Two Smart Card ports
• Supports video plane re-sizing for format conversion,
picture-in-picture, or picture-in-graphics
• 32-bit 33 MHz PCI controller
• High-performance de-interlacing supports 480i to
480p/720p and 1080i to 480p/720p conversions
• OpenCable™ CableCARD™ M-Card interface
• Multi-format audio decoder supporting decoding
of MPEG-1, MPEG-2, Dolby Digital, Dolby Digital Plus,
MPEG-2 AAC, MPEG-4 AAC, aacPlus, WMA and
WMA Pro encoded bitstreams
• Advanced 2D graphics rendering engine for alphablt,
bitblt, textblt, line draw, and color expansion acceleration
• Multiple I2S, 12C, SPI, GPIO, UARTs
• Infrared (IR) input/output
• Integrated V.92 modem
Set-top Box Solutions
Conexant Product Portfolio
The company’s broad portfolio of semiconductor products also includes client-side DSL and cable modem solutions, home network processors,
broadcast video encoders and decoders, digital set-top box components and systems solutions, and dial-up modems. In addition to its IEEE 802.11a/b/gcompliant WLAN chipsets, software, and reference designs, Conexant offers a suite of networking components that includes solutions for applications
based on HomePlug® and HomePNA™. 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.
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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
subject to change without notice.
This material is provided AS IS and without
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particular purpose and non-infringement.
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General Information:
U.S. and Canada: (888) 855-4562
International: (732) 345-7500
4000 MacArthur Blvd.
Newport Beach, CA 92660
Order# PBR-201087