BCM3214

Features:

• Performs DOCSISTM 2.0 MAC layer functions,including:
· Fragment reassembly and deconcatenation
· Logical channels
· Payload header suppression and expansion
· 56-bit DES encryption and decryption
· Generation and checking of HCS and CRC
· MPEG encapsulation of downstream traffic
· Timestamp and SYNC message generation
• Supports one downstream and up to six upstream channels simultaneously
· Many other downstream-to-upstream ratios can be achieved by connecting multiple BCM3214s via the seamless MAP master/slave interface
• Processes up to 400 000 packets per second in the aggregate over all upstream and downstream channels
• Direct interface to:
·BCM3040 QAMLink® DOCSISTM 2.0 Advanced QAM modulator (providing downstream data rates up to 100 Mbps)
·BCM3140 QAMLink® dual-channel DOCSIS 2.0 burst receiver (providing upstream data rates up to 40 Mbps per upstream channel)
• Packet port provides a high-throughput data interface to other network equipment via the standard IEEE 802.3z GMII Ethernet interface
• PCI interface to external host CPU supports either 32-bit or 64-bit operation at either 33 MHz or 66 MHz
• PROPANETM packet acceleration and Smart SpectrumTM technologies for increased upstream performance

Description

The BCM3214 QAMLink is highly integrated CMTS media access controller (MAC) chip for use in DOCSIS 2.0-based CMTS products. With hardware support for concatenation parsing, fragment reassembly, payload header suppression at speeds up to 40 Mbps physical-layer data rates, the BCM3214 serves as the heart of DOCSIS 2.0-based CMTS equipment.

The BCM3214 supports the association of one downstream channel with up to six upstream channels. By connecting multiple BCM3214 chips via the seamless master/slave interface, customers can achieve many downstream and upstream ratio configurations.

The BCM3214 combined with the BCM3040 QAMLink® downstream modulator and BCM3140 QAMLink burst receiver provides a complete solution for advanced DOCSIS 2.0-based cable headend equipment.