BCM93725 advanced set-top box reference design with voip daughter card product brief BCM93725 highly integrated frontend and backend resulting in a cost effective advanced set-top box solution dual cmos tuner architecture allows for simultaneous viewing of internet and video or picture- in-picture hdtv decoder supports all formats for maximum versatility pci architecture allows the use of low cost pc peripherals docsis 1.1 cable modem qos enables applications to support voip and videoconferencing support for docsis 1.1, davic 1.2, and dcii enable deployment in virtually all major markets worldwide single high-performance risc processor capable of supporting today s demanding set-top box operating systems, applications, and cable modem traffic reference design includes: schematics and gerber files bill of material (bom) data sheets and users manual software source code applications support BCM93725 advanced set-top box reference design summary of benefits bcm3250 advanced set-top box frontend including docsis/davic cable modems dual 256 qam variable symbol rate receivers supporting itu-t j.83 annex a/b/c qpsk out-of-band receiver and qpsk/16 qam upstream burst modulator docsis 1.1 mac supporting quality of service (qos) davic 1.2 mac bcm7020 high definition video/graphics subsystem atsc-compliant all format mp@hl mpeg-2 video decoder dolby ac-3/musicam broadcom advanced 2d/3d graphics engine ntsc/pal video decoder ntsc/pal/hd video encoder pci and local bus interfaces dual broadcom cmos tuners high-performance 350 mips risc r5000 class microprocessor voip daughter card supporting 4-lines of voice peripheral devices include: hpna 1/2, ieee1394, pod interface with pcmcia connector, ethernet, v.90 softmodem software device drivers supporting multiple operating systems BCM93725 features
diplex filter cmos tuner analog ntsc pci bus pci bus r5000 cpu 350 mips bcm7020 hd video/graphics bcm7014 graphics engine w/ntsc encoder/decoder/ system controller bcm7010 mpeg a/v & transport & audio/video dacs rom flash i/o bcm3340 voip dsp bcm4211 bcm4100 hpna v.90 codec 10/100 base-t transceiver usb i/f ide controller serial/ parallel ports pci expansion connector 1394 i/f sdram audio input analog audio out video out pod ca smart card pa bcm3250 universal front-end bcm3300 single-chip cable data modem with qam receiver with fec & upstream qpsk/16-qam modulator & euro docsis 1.1 mac bcm3120/3125 qam receiver w/fec & oob receiver w/fec & upstream qpsk/16-qam modulator davic 1.2 mac cmos tuner local bus the broadcom BCM93725 is an advanced set-top box reference design supporting high definition television (hdtv) and broadband cable modem internet access. it is a highly integrated, cost effective design built on the latest generation of broadcom silicon and software offering low risk and quick time to market for the next generation of interactive set-top boxes. the core chip set on the BCM93725 includes the bcm3250 interactive set-top box frontend with docsis/davic modems, bcm7020 advanced high definition/video graphics subsystem, and a high-performance mips r5000 class processor. the bcm3250 is a complete frontend advanced set-top box solution providing dual 256-qam receivers, an out-of-band qpsk receiver and a qpsk/16-qam upstream burst modulator. all major physical layer standards are supported allowing set- tops based on the BCM93725 design to be deployed worldwide. the device includes a complete docsis 1.1 mac (including qos) and davic 1.2 mac for broadband interactive services. the bcm7020 is a device which cost effectively supports the requirements of television and set-top box systems that require high-definition, multiple stream standard-definition video decoding with the capability of simultaneous high-definition and standard-definition outputs. features also include studio quality text for presenting standard windows fonts on a sd or hd television and a high performance 2d/3d graphics engine for 3d effects. the BCM93725 also includes a high-performance mips risc processor supporting middleware, graphics, applications, and cable modem traffic. the single processor design eliminates the need for multiple processors in the set-top, substantially reducing system cost. the BCM93725 contains a number of peripherals required for next generation set-top boxes. some of these include home phone line networking (hpna 1/2) for streaming of data and video throughout the home, voip daughter card supporting 4 lines of voice, ieee1394 for connection to digital consumer electronic devices such as digital video recorders (dvr), and a pod interface for external conditional access. in addition, a low cost v.90 softmodem has been included for alternative low data rate connections. the BCM93725 supports industry-standard operating systems such as windowce, aperios, java, opentv, powertv, psosystem, and others. in addition, broadcom offers device drivers that are compatible with a number of operating systems and apis. BCM93725 overview for more information please contact us at: phone: 949-450-8700, fax: 949-450-8710 email: info@broadcom.com visit our web site at: www.broadcom.com ? 1999 broadcom corporation 93725-pb00-r-12.08.99 broadcom and the pulse logo are trademarks of broadcom corporation and/or its subsidiaries in the united states and certain other countries. broadcom corporation 16215 alton parkway, p.o. box 57013 irvine, california 92619-7013
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