BCM3300 OVERVIEW

The Broadcom® BCM3300 combines a 256-QAM receiver, a 4/16-QAM burst transmitter and a complete DOCSIS compliant MAC integrated into a single chip. The BCM3300 is the world’s first and only single chip, DOCSIS version 1.0 and 1.1 compliant solution with extensions for fragmentation and Quality of Service (QoS).
The receiver directly samples a tuner output, digitally resamples and demodulates the signal with recovered clock and carrier timing, filters and equalizes the data, passing soft decisions to an ITU-T J.83 Annex A/B/C compatible decoder.

BCM3300 FEATURES
• Integrated QAMLink Receiver
    • 10-bit A/D converter with input AGC amplifier
    • Variable symbol rate 256 QAM receiver
    • Digital demodulator, Nyquist filters, tracking loops and 32-tap adaptive decision feedback equalizer
    • ITU-T J.83 Annex A/B/C compatible FEC
• Integrated Upstream Transmitter
    • Programmable FEC encoder
    • Pre-equalizer filter
    • QPSK/16 QAM burst modulator
    • 10-bit D/A converter with output power control
• Integrated DOCSIS Media Access Controller (MAC)
    • DOCSIS version 1.0 and 1.1 compliant
    • Supports for fragmentation and concatenation
    • Supports enhanced Quality of Service (QoS) for Voice over IP (VoIP) applications
    • Support for 16 destination address and 256 multicast address filters
    • Four simultaneous upstream SIDS multiplexed to 16
• CPU Interfaces
    • Motorola MC68360, MPC850 PowerPC
    • IDT79R3081 MIPS, BCM3310 Communications Processor
• 3.3V Operation
• 256-pin BGA package