BCM3348 features sdram flash BCM3348 high-performance single-chip docsis/eurodocsis 2.0 cable modem 10/100 ethernet silicon tuner medium speed usb 2.0 diplexer saw high-performance, single-chip docsis/eurodocsis 2.0 cable modem ? results in simplified bom?reduces component count, improves assembly process and results in lowest overall system cost for docsis/ eurodocsis 2.0 cable modem ? docsis 1.1 mac provides compatibility with existing cm applications code resulting in minimum time-to-market ? 200-mhz mips32? cpu provides 40% improvement in packet throughput over previous generations ? advanced qamlink ? modulator/demodulator provides superior performance in noisy plant environment ? on-chip propane supports docsis/eurodocsis compatible packet acceleration ? integrated 10/100 ethernet mac/phy with mii eliminates the need for external ethernet support ? fully usb 1.1 compliant interface enables simple plug and play installations ? ejtag embedded ice support is compatible with existing mips32 development tools improving software development and testing ? sixth-generation technology results in a highly-stable, reliable product summary of benefits qamlink ? ? docsis? 2.0 high-performance, single-chip cable modem product p r o d u c t brief b r i e f BCM3348 ? state of the art, single chip docsis/eurodocsis 2.0 cable modem providing unprecedented levels of integration and performance ? the BCM3348 integrates: ? advanced qamlink ? transceiver supporting annex a/b/c operation ? docsis/eurodocsis 2.0 mac ? high performance 200-mhz mips32 ? cpu ? advanced qamlink ? ? downstream demodulator, supporting 4/16/32/64/128/256/512/1024-qam ? advanced qamlink? upstream modulator, supporting 2/4/8/16/64/128/256-qam wth s-cdma ? upstream power amplifier ? 10/100 ethernet mac/phy with mii interface ? single 28-mhz reference crystal ? usb 1.1 slave port with integrated transceiver ? 100-mhz sdram interface ? advanced rf and control interface to silicon tuner for docsis/eurodocsis solutions ? ejtag embedded ice support ? on-chip support for propane tm packet acceleration ? sixth-generation technology ? on-chip regulation support single voltage operation ? 352-pin pbga package ? www.datasheet www.datasheet www.datasheet www.datasheet 4u 4u4u 4u .com .com .com .com
the BCM3348 combines an rf receiver with an advanced qam and s-cdma demodular, an advanced qam transmitter, a complete docsis 2.0 media access controller (mac), a 200-mhz mips32? communication processor, a 16-bit, 100-mhz sdram interface, 10/100 ethernet mac with integrated transceiver and mii interface, and a medium-speed usb 2.0 controller with integrated transceiver. the qam receiver directly samples a tuner output with a 11-bit a/d converter and input acg amplifier. the receiver digitally resamples and demodulates the signal with recovered clock and carrier timing, filters and equalizes the data and passes soft decisions to an itu-t j.83 annex a/b/c compatible decoder. the receiver supports variable symbol rate 4/16/32/64/128/256/512/1024-qam fec decoding. the final received data stream is delivered in a serial mpeg-2 transport format. all gain, clock, and carrier, acquisition and tracking loops are integrated in the qam receiver. the upstream transmitter takes burst or continuous data, provides fec encoding and pre-equalization for docsis applications, filters and applies 2/4/8/16/64/128/256-qam or s-cdma, modulation to the data stream, amplifies the signal through the integrated upstream power amplifier and provides a direct 0?65 mhz analog output. the BCM3348 media access controller (mac) includes all features required for full docsis 1.0, 1.1 and 2.0 compliance, including full support for baseline privacy (bpi+) encryption and decryption. single-user support includes 4 sids in downstream, 4 da perfect-match filters, a 256-entry cam for multicast/unicast hash filter, and 4 independent upstream queues for simultaneous support of qos and be traffic. to enhance operational support, the BCM3348 mac provides extended network management mib/diagnostic features, as well as immediate ucc (on-the-fly) using independent resets for downstream and upstream and both individual queue reset/flush for upstream queues. the BCM3348 uses advanced propane techniques to provide packet acceleration to significantly improve upstream channel utilization. with the incorporation of an upstream power amplifier, the BCM3348 allows a complete cable modem to be assembled with a minimal set of external components. when used with the silicon tuner, the BCM3348 offers the lowest-price solution for a high performance, single-user docsis 2.0 cable modem. BCM3348 overview 100-mhz isb ethernet mac usb mac ebi/pcmcia expansion module 16-bit sdram interface transmission convergence module silicon tuner coaxial cable diplexer usb 10/100 ethernet isolation 64-mb 100-mhz 8-mb flash sdram docsis 2.0 mac module peripheral logic 200-mhz mips32 core with mmu 8/8-kb i/d cache advanced modulator qpsk-256-qam advanced demodulator 16 ? 1024-qam power amplifier filter ethernet transceiver BCM3348 isolation spi i/f serial flash (optional) ? phone: 949-450-8700 fax: 949-450-8710 email: info@broadcom.com web: www.broadcom.com broadcom ? , the pulse logo, propane tm , qamlink ? , and connecting everything ? are trademarks of broadcom corporation and/or its subsidiaries in the united states and certain other countries. all other trademarks are the property of their respective owners. broadcom corporation 16215 alton parkway, p.o. box 57013 irvine, california 92619-7013 ? 2002 by broadcom corporation. all rights reserved. 3348-pb02-403-r 11.26.02 www.datasheet www.datasheet www.datasheet www.datasheet 4u 4u4u 4u .com .com .com .com
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