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Set-top Box Solutions Satellite
DVB-S FTA Satellite Set-top Box Reference Design
Featuring the CX24138 DVB Decoder and CX24109 Satellite Tuner IC
Conexant's portfolio includes a comprehensive suite of semiconductor solutions for broadband communications, enterprise networks, and the digital home. The DVB-Satellite (DVB-S) set-top box reference design features Conexant's CX24109 RF tuner and CX24138 satellite system-onchip (SoC) to provide a low-cost, high-featured, complete system solution. The system receives and down-converts quadrature phase-shift keying (QPSK) satellite digital video signals to baseband with the CX24109 RF tuner. The CX24138 includes an integrated ARM920T (R) main system processor running at 100 MHz, integrated QPSK demodulator, MPEG-2 audio and video decode, and TV encoder functions. The integrated 10-bit video DACs, integrated voltage-controlled crystal oscillator (VCXO), power-on reset circuitry, direct drive of video output connectors and clock generation from a single crystal, coupled with a two-layer PCB and low-cost front panel design, effectively reduce the system bill of material (BOM) cost for STB manufacturers. Conexant offers a complete reference design package integrating the CX24138 with the CX24109 tuner and an unprecedented level of localized design and sales support to accelerate development time-to-market. The DVB-S free-to-air (FTA) satellite STB reference design kit includes samples, schematics, layout, BOM, STB drivers, scan algorithm, user interface with Chinese and English language support, and complete documentation of the hardware and software system solution. The company's broad portfolio of semiconductor products also includes client-side digital subscriber line (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/g-compliant wireless local area network (WLAN) chipsets, software and reference designs, Conexant offers a suite of networking components that includes solutions for applications based on HomePlug(R) and HomePNATM. 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
Distinguishing Features
* CX24138 SoC with 100 MHz ARM920T CPU * CX24109 silicon tuner * 1.25 V core voltage * Integrated VCXO * Integrated 10-bit video DACs * Dolby(R) Digital passthrough on Sony/Philips Digital Interchange Format (S/PDIF) * RS-232 and Joint Test Action Group (JTAG) interfaces
Part Number CX04-GUBEIDQ-IRD Description DVB-S FTA Satellite Set-top Box Reference Design
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Set-top Box Solutions Satellite
Features and Benefits
* High-performance SoC with integrated QPSK demodulator * Direct down-conversion technology and integrated-noise amplifier/local oscillator (LNA/LO) * Very low power consumption * Complete system clock from a single crystal - no external circuit or VCXO module required Direct connect to infrared (IR) module System control of front panel by software CX24138 drives standard 75 W load directly Supports software download via over-the-air (OTA) broadcast or RS-2332 port * Multi In-Circuit Emulation (ICE) debug environment * * * *
+24V Power Connector +9V +5V +3.3V Reset Module Multi-ICE Connector SDRAM 8MB FLASH 512KB
Regulator
Power-On Reset
JTAG Interface
SDRAM Interface
I/O Bus Interface Analog Video Interface
S-Video Connector
Xtal 10.111 MHz CX24109 Tuner LNB Control Internal QPSK Demodulator Interface CX24138
CVBS Digital Audio Interface Audio DAC L CH R CH
IR Receiver Interface LNB Regulator IR Module
GPIO
UHF Modulator
Front Panel Connector
CX24138 Block Diagram
User Interface
* Satellite antennae input port * RCA for composite video baseband signal (CVBS) video and audio line receiver (L/R) * S-Video port * Dolby(R) Digital passthrough on S/PDIF * RS-232 serial port * Audio/video (A/V) connector for RF modulator * Power adapter connector * Front panel connector with IR signal receiver * I2C-compatible expansion connector * JTAG debug connector
Characteristics
CX24138 with 100 MHz ARM920T core 8 MB SDRAM 512 KB Flash MPEG-2 MP@ML, MPEG-1 Layer 1 and 2 CX24109, zero-IF architecture PAL/NTSC/SECAM 72.5 Mbps maximum MPEG-2 MUSICAM Mono, double channel, stereo Supports 16, 22.05, 24, 32, 44.1, 48 kHz Two-dimensional (2D) hardware graphic accelerator, optimized memory bandwidth On-Screen Display (OSD) 8 bpp color mode, flicker filtering and hardware cursor Main processor Main memory Program memory Video decode Tuner Video format TS Demux data rate Audio decode Audio mode Audio sample rate Graphic accelerate
(c) 2004, 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 subject to change without notice.
THIS MATERIAL IS PROVIDED AS IS AND WITHOUT
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
Conexant shall not be liable for any
www.conexant.com General Information: U.S. and Canada: (888) 855-4562 International: (732) 345-7500 Headquarters 100 Schulz Drive Red Bank, NJ 07701 Order# 102518A
special, indirect, incidental or consequential damages as a result of its use.
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