bcm3214 Broadcom Corp., bcm3214 Datasheet

bcm3214

Manufacturer Part Number

bcm3214

Description

Bcm3214 - Docsis /eurodocsis 2.0-based Cmts Mac

Manufacturer

Broadcom Corp.

Datasheet

1.BCM3214.pdf (2 pages)

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Bonase Electronics (HK) Co., Limited

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bcm3214A3IPB

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Bonase Electronics (HK) Co., Limited

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•

Performs DOCSIS

• 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

Processes up to 400,000 packets per second in the aggregate over

all upstream and downstream channels

Direct interface to:

• BCM3040 QAMLink

• BCM3140 QAMLink dual-channel DOCSIS 2.0 burst receiver

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

P r o p a n e ™ p a c k e t a c c el er a t i o n a n d S m a rt S p ec t r u m ™

technologies for increased upstream performance

connecting multiple BCM3214 devices via the seamless MAP

master/slave interface

(providing downstream data rates up to 100 Mbps)

(providing upstream data rates up to 40 Mbps per upstream

channel)

BCM3214 DOCSIS

F E A T U R E S

2.0 MAC layer functions, including:

DOCSIS 2.0 Advanced QAM modulator

BCM3140

Typical Application Block Diagram

BCM3034

BCM3140

Downstream

Modulator

TDMA Receiver

Dual Advanced

BCM3140

Advanced CMTS MAC

BCM3214

reassembly)

2.0 ADVANCED CMTS MAC

Upstream

(keys and

SDRAM

(PHS, output

Downstream

(PHS, output

Upstream

BCM3214

queues)

SDRAM

queues)

SDRAM

•

Ethernet

Hardware support for MAC-layer per-packet functions

including fragmentation, concatenation, and payload header

suppression offloads system CPU, giving higher overall system

performance

E x tra c tio n o f b a n d w id t h r e q u e s ts a n d D O C S I S M A C

management messages allows software to access these messages

without examining data packets

Class-based queuing allows traffic prioritization:

• High, medium, and low priority downstream queues

• High priority, low priority, request, and MAC management

S u p p o rt f o r c ar r i er c l a ss re d u n d an c y vi a t i m e s t a m p

synchronization across multiple BCM3214 devices

Supports high packet rates for maximum utilization of available

cable plant bandwidth

Out-of-band (OOB) generator for messaging to BCM3352-based

cable modems

Can be remote from the external routing/classification engine for

distributed CMTS (mini fiber node) applications

Can be remote from the external routing/classification engine for

distributed CMTS (mini fiber node) applications

SPI Master port controls the register interface to BCM3040 and

BCM3140 devices

Operates over industrial temperature range (–40°C to +85°C)

PCI bus

upstream queues

S U M M A R Y O F B E N E F I T S

Classification

System CPU

Routing/

Memory

Engine

WAN

Related parts for bcm3214

bcm3214 Summary of contents

Page 1

... Supports one downstream and up to six upstream channels simultaneously • Many other downstream-to-upstream ratios can be achieved by connecting multiple BCM3214 devices via the seamless MAP master/slave interface • Processes up to 400,000 packets per second in the aggregate over all upstream and downstream channels • ...

Page 2

... In-band I/F MPEG Video Source (in MPEG slave mode only) The BCM3214 is a highly integrated CMTS MAC integrated circuit for use in DOCSIS 2.0 and advanced TDMA PHY-layer CMTS products. With hardware support for concatenation parsing, fragment reassembly, payload header suppression, and advanced TDMA physical layer data rates, the BCM3214 serves as the heart of a next-generation CMTS ...

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