BCM3250 ETC, BCM3250 Datasheet

BCM3250

Manufacturer Part Number

BCM3250

Description

QAMLINK ADVANCED SER-TOP BOX SINGLE-CHIP FRONT-END

Manufacturer

ETC

Datasheet

1.BCM3250.pdf (2 pages)

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Bonase Electronics (HK) Co., Limited

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BCM3250KPB

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Download datasheet (159Kb)

•

BCM3250 QAMLINK

Two complete QAMLink variable symbol rate receivers (in-

band video and DOCSIS/EuroDOCSIS IP data receive

channels)

• Dual 10-bit A/D converters with input AGC amplifiers

• Dual 1-7 Mbaud 256-QAM receivers

• Dual ITU-T J.83 Annex A/B/C compatible FEC decoders

QPSK out-of-band receiver

• 100 – 200 MHz LO with AGC and 6-bit A/D converter

• DigiCipher II®/DVB/DAVIC FEC decoder

Upstream QPSK/16-QAM transmitter

• 0 – 65 MHz direct RF output

• Programmable Starvue II/DOCSIS/EuroDOCSIS/DVB/DAVIC

• 10-bit D/A converter with output power control interfaces

DOCSIS/EuroDOCSIS media access controller (MAC)

• DOCSIS/EuroDOCSIS version 1.1 based

• Extensions for fragmentation and concatenation

• Support for enhanced Quality of Service (QoS) for Voice over

DAVIC media access controller (MAC)

• DAVIC 1.2/1.5 compliant

• Support for 1.5 Mbps and 3 Mbps on both upstream and

• Parsing, CRC, and ATM cell extraction

• Hardware SAR engine

Both processor interface and PCI 2.2

Direct interface to VoIP DSP

C able

P lant

FEC encoder

IP (VoIP) applications

downstream

D iplex

T uner

F ilter

D ual

with

O ut - of -B and C hannel

IP D ata C hannel

V ideo C hannel

U pstream T ransmitter

F E A T U R E S

V.90 S oft M odem

C odec

Interactive Set-Top Box System Block Diagram

ADVANCED SET-TOP BOX SINGLE-CHIP FRONT-END

Set-top Box

BCM3250

Single-Chip

QAMLink

Advanced

Front-End

A nalog V ideo

•

BCM3250

Represents a complete solution for interactive set-top box

front-end, including cable modem functions.

• Universal front-end supports the ITU-T J.83 Annex A/B/C as

• DOCSIS/EuroDOCSIS 1.1-based media access controller

• DAVIC 1.2/1.5 MAC supports conditional access systems and

• BCM3250, together with BCM7020/BCM7030 Video Decoder

Includes second in-band channel pass through for picture-in-

picture functionality and multiple camera angles.

Integration of all analog functions leads to lower system cost

and improved performance.

Single upstream transmitter is shared between modem and

upstream interactive video commands, eliminating the need

for a second upstream channel.

Integrated peripheral control unit supports required set-top

box peripherals without additional external devices.

Transport/Graphics Subsystem

well as OpenCable, DOCSIS/EuroDOCSIS and DVB/DAVIC.

(MAC) supports Voice over IP and high-speed Internet access

capability.

lower data rate services.

and Graphics Engine, provide a two-chipset solution for

OpenCable applications.

CPU

BCM7038 Dual HD decoder

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

MIPS64 microprocessor

I/O

Peripherals

V ideo O ut

A udio O ut

Related parts for BCM3250

BCM3250 Summary of contents

Page 1

... Universal front-end supports the ITU-T J.83 Annex A/B/C as • DOCSIS/EuroDOCSIS 1.1-based media access controller • DAVIC 1.2/1.5 MAC supports conditional access systems and • BCM3250, together with BCM7020/BCM7030 Video Decoder • Includes second in-band channel pass through for picture-in- picture functionality and multiple camera angles. ...

Page 2

... The Broadcom BCM3250 combines dual 256-QAM receivers, a 4/16- QAM burst transmitter, an out-of-band QPSK receiver, a DOCSIS/ EuroDOCSIS 1.1 based MAC, and a DAVIC 1.2/1.5 compliant MAC integrated into a single chip. The BCM3250 is the world’s first complete front-end solution with an integrated DOCSIS/EuroDOCSIS 1.1 MAC to address the next generation of OpenCable/interactive set-top boxes. ...

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