BCM7328 ? single-chip satellite set-top box decoder BCM7328 single-chip system block diagram ? dual on-chip 8psk/ turbo code demodulators - 1-45 mbaud variable rate receiver -dvb/directv ? /digicipher ii compliant fec decoder data transport processor - support for directv and mpeg transport streams - des/dvb descrambler - support for 64 pids and 64 section filters - support for play/ record from/to hard disk dual mpeg-atsc compliant audio/video decoders - mp@ml mpeg2 video decoder - dual decode of mpeg layer 1 & layer 2 audio - support for dolby ac-3 and compressed pcm dual broadcom graphics engine (bge) - supports 3 graphics, 1 x video & h/w cursor planes - 2d video scaling support - integrated pal/ntsc/secam encoder mips64 tm cpu core @ 250 mhz -mmu - ejtag debug interface provides a cost-effective solution for dual decode, direct broadcast satellite (dbs) applications fully integrated dual 8psk/ tc receivers, mpeg2 a/v decoder, mips cpu and peripherals for complete set-top box system - simultaneously supports two tvs with independent programming and on-screen graphics displays advanced 2d graphics system allows applications such as internet browsers and electronic program guides to deliver studio quality text and graphics on television monitors broadcom developed device drivers enable rapid software development cycle with support of industry-standard operation systems industry leading third-party operating systems, tool chains and middleware supported, including opentv, nds?s xtv pvr system features summary of benefits BCM7328 flash ddr bcm3440 si tuner cvbs, y/c rgb rf 3/4 audio l/r ir tx uhf/ir rx fp/keypad mafe/ modem bcm3440 si tuner
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 ? 2003 by broadcom corporation. all rights reserved. 7328-pb00-r 12/29/03 broadcom ? , the pulse logo, and connecting everything ? are trademarks of broadcom corporation and/ or its subsidiaries in the united states and certain other countries. all other trademarks mentioned are the property of their respective owners. the BCM7328 is the second-generation of broadcom?s dual decode/ dual tv set-top box system on a chip. the BCM7328 integrates broadcom?s field-proven bcm4500 8psk/tc demodulator technology, as well as technology derived from broadcom?s cable products (such as the bcm7115 cable single-chip). the BCM7328 memory subsystem is a unified memory architecture, (uma), utilizing a 150-mhz double data rate (ddr) memory interface that supports either 16-bit or 32-bit wide, depending on required system performance. the BCM7328 single chip can decode two transport streams, delivered either via the external dual bcm3440 cmos tuners and display the resulting decoded audio and video on two independent tv monitors, connected to the set-top box. a ch annel 3-4 rf modulator is also included on-chip. the video encoder supports ntsc, pal & secam with optional macrovision 7.1. the BCM7328 includes dual implementations of broadcom?s advanced 2d graphics engine, offering true studio quality text and graphics with extremely efficient use of memory and bandwidth the BCM7328 also incorporates a complete mips64-based microprocessor subsystem, includi ng 16-kb instruction cache, 16-kb data cache and 2-kb read ahead cache. the cpu runs at 250 offering over 250-dmips rating. analog video1 composite video encoder and dacs pcm audio engine & dacs dual advanced 2d graphics & video display engine memory controller dma dual dolby & mpeg audio decoder mpeg2/dss transport processor with dvb & des descramblers iso7816 i/f spdif dual sd mpeg -2 video decoder mips64 micro 16k i & 16k d ir tx/rx keypad serial ports i/o receiver 8psk/tc receiver i2c/pcm analog video2 bus bridge modem interface ejtag rf 3/4 on-chip boot rom analog video1 composite video encoder and dacs pcm audio engine & dacs dual advanced 2d graphics & video display engine memory controller dma dual dolby & mpeg audio decoder mpeg2/dss transport processor with dvb & des descramblers 16-bit ddr iso7816 i/f spdif dual sd mpeg -2 video decoder mips64 micro 16k i & 16k d ir tx/rx keypad serial ports i/o 8psk/tc receiver receiver i2c/pcm analog video2 bus bridge rom/flash modem interface ejtag rf 3/4 on-chip boot rom 8 kb 250-300 mhz
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