BCM7315 ? single-chip satellite set-top box decoder BCM7315 single-chip system block diagram ? all-digital satellite receivers - 1?45 mbaud variable rate receiver - integrated 7-bit a/d converters - complies with dvb/directv ? /digicipher ii? 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 mpeg-atsc compliant audio/video decoders - mp@ml mpeg-2 video decoder - decode of mpeg layer 1 and layer 2 audio - support for dolby? ac-3 and compressed pcm broadcom graphics engine (bge) - supports 3 graphics, 1 x video and h/w cursor planes - 2d video scaling support - integrated pal/ntsc/secam encoder - itu-656 input support mips32tm cpu core @ 175 mhz - mmu support - ejtag debug support ide host adapter - ata5 command set, ultra ata/66 i/f provides a cost-effective solution for direct broadcast satellite (dbs) applications fully integrated qpsk receiver, mpeg-2 a/v decoder, mipstm cpu and peripherals for complete set-top box system - low cost solution for next generation set-top boxes pvr capability enables personal viewing and scheduling, video-on-demand (vod), and vcr ?trick mode? effects on any video stream - encryption ensures copy protection of recorded programming content - simultaneous support for record and playback 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 operating systems subsystems are based on broadcom?s field-proven production-available technologies features summary of benefits bcm3440 cmos tuner BCM7315 sdram dual video output flash dual smartcard pvr dual audio output
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. 7315-pb02-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 BCM7315 is a satellite set-top box system on a single chip, integrating broadcom?s field-proven bcm4500 qpsk demodulator technology, as well as technology derived from broadcom?s existing cable products (such as the bcm7115 cable stb single-chip device). the BCM7315 is designed based on a unified memory architecture, (uma), utilizing 16-bit wide double data rate (ddr) memory for added performance. the BCM7315 is a complete single chip that can decode transport streams, delivered either via the external bcm3440 cmos tuner or via the ide host i/f from an external hard disk drive, (or combination), and display the resulting decoded audio and video on a television monitor connected to the set-top box. a channel 3?4 rf modulator is also included on-chip to further reduce system design complexity. the on- chip video encoder supports ntsc/pal and secam with optional macrovision 7.1 on the output. the BCM7315 includes broadcom?s advanced 2d graphics engine, offering true studio quality text and graphics with extremely efficient use of memory and bandwidth the BCM7315 also incorporates a complete industry standard mips32? based microprocessor subsystem, including 8-kb instruction cache, 8-kb data cache and 2-kb r ead ahead cache. internal bridges to memory and local busses provide support for external peripherals on- chip as well as off-chip. a full range of peripheral devices are supported on the BCM7315 , including uarts, dual iso7816 smart card i/fs, gpios, counters/ timers, ir tx/rx, i2c and spi controllers. xport sd-mpeg-2 video decoder graphics video encoder video ide host ifc dacs (4) audio rf modulator dacs mpeg/dolby audio decoder ejtag ddr-sdram controller peripheral test ice 16-bit ddr-dram ir/uart spi/i 2 c/gpio/pwm smartcard mips mmu (175 mhz) bme sdram clients: xport, mpeg, graphics audio, dma isb dma clients: ide, usb, ebi qpsk receiver usb 1.1 host controller ebi sram rom (flash) satellite access/ icam spdif mpeg xport ide/ itu-r656 i 2 s video composite s-video audio left _p/n right _p/n channel 3/4 hsx host
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