BCM3300 データシートの表示（PDF） - Broadcom Corporation
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BCM3300 Datasheet PDF : 2 Pages
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BCM3300
PRODUCT
®
Brief
BCM3300 QAMLink® SINGLE-CHIP DOCSIS CABLE MODEM
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
SUMMARY OF BENEFITS
• Fully-integrated, DOCSIS-compliant PHY/ MAC
integrated circuit
• Reduces overall system cost
• Simplifies system, board and software design
• Reduces power consumption
• Single crystal design with direct IF sampling
• Complete Media Access Control (MAC) function for
MCNS-compliant cable modem
• Ensures interoperability in consumer-grade products.
• Baseline privacy encryption and decryption
• Support for up to 16 SIDs and 16 56-bit DES
encryption keys with initialization vectors
• 40-bit DES version available for export
• Hardware processing, enabling real-time
• Termination of MPEG-2 transmission convergence
sublayer
• Generation/verification of CRC and HCS
• Extraction and processing of time stamps and system
timing
• MAP message handling and upstream bandwidth
requests
• MAC layer fragmentation in hardware
• Extensive address filtering
5-42 MHz
Diplex
Filter
54-860 MHz
DOCSIS-Compliant External Cable Modem
LPF
PA
Control
SRAM
RF
Tuner
SAW
BCM3300
Single-Chip
MCNS/DOCSIS
Cable Modem
DRAM
FLASH
Serial 1,2
BCM3310
USB Ethernet
BCM5201
10/100BT
XCVR
USB
XCVR
RJ-45
USB
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