bcm3212 Broadcom Corp., bcm3212 Datasheet

bcm3212

Manufacturer Part Number

bcm3212

Description

Bcm3212 - Docsis /eurodocsis 1.1 Advanced Cmts Mac

Manufacturer

Broadcom Corp.

Datasheet

1.BCM3212.pdf (2 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

bcm3212B3IPB

Manufacturer:

BROADCOM

Quantity:

852

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•

Performs DOCSIS

• Fragment reassembly

• Deconcatenation

• 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:

• BCM3034 QAMLink® advanced universal QAM modulator

• BCM3138 QAMLink® dual-channel advanced PHY burst

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

PROPANE

SPECTRUM

performance

connecting multiple BCM3212 devices via the seamless MAP

master/slave interface

(providing downstream data rates up to 100 Mbps)

receiver (providing upstream data rates up to 30 Mbps per

upstream channel)

packet acceleration and SMART

technologies included for increased upstream

F E A T U R E S

1.1 MAC layer functions, including:

DOCSIS

BCM3138

Dual Adv. TDMA

BCM3138

Downstream

Advanced CMTS MAC

Typical Application Block Diagram

BCM3034

Modulator

Receiver

1.1 ADVANCED CMTS MAC

BCM3212

reassembly.)

Upstream

(keys and

SDRAM

Downstream

SDRAM

queues)

(PHS,

output

Upstream

SDRAM

queues)

(PHS,

output

Ethernet

•

BCM3212

Hardware support for MAC-layer per-packet functions

including fragmentation, concatenation, and payload header

suppression offloads system CPU, giving higher overall system

performance.

Extraction of bandwidth requests and DOCSIS MAC

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

Support for carrier class redundancy via timestamp

synchronization across multiple BCM3212 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 remoted from external routing/classification engine for

distributed CMTS (mini fiber node) applications.

SPI master port controls register interface to BCM3034 and

BCM3138 devices.

Packaged in an 841-pin, thermally enhanced plastic ball grid

array.

Operates over industrial temperature range (–40 to +85

degrees C) PCI bus.

System

upstream queues

Memory

CPU

Classification

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

Routing/

Engine

WAN

Related parts for bcm3212

bcm3212 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 BCM3212 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 Direct interface to: • ...

Page 2

... BCM3212 can communicate with the out-of-band receiver of the BCM3352 cable modem device for control of power management functions. All configuration and management of the BCM3212 is done via the PCI interface. The PCI interface accommodates either 32-bit or 64-bit hosts operating at either 33 MHz or 66 MHz. The 100/1000 Ethernet MAC provides a standard interface (IEEE 802 ...

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