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7325-PB02-R

07/29/08

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owners.

BCM7325 Reference Design

The BCM7325 is Broadcom’s next-generation satellite set-top box

system on a single chip in 65-nm process. It integrates a single tuner/

demodulator from the BCM4506 front-end technology and the latest

generation of AVC decoder that supports multiple video formats. The

BCM7325 supports worldwide standards for DBS transmission systems

based on DVB-S2, 8PSK, and is backward compatible with the DVB-S

standards.

The BCM7325 operates on a dual-threaded MIPS CPU core running at

333-MHz and yielding over 600 DMIPS in performance. The BCM7325

is designed to support UMA and non-UMA memory architectures,

utilizing a 400-MHz clock, 32-bit wide Double Data Rate (DDR2)

memory I/F for enhanced performance and allows cost-effective

memory solutions.

The BCM7325 is a true single chip that can decode transport streams

delivered via the integrated DBS front end. In addition, it is capable of

decoding external TS input from 10/100 Ethernet ports. Several

interfaces required for TV output are integrated on chip including the

HDMI, baseband composite, component, or S-Video. An RF channel 3/

4 modulated output is also integrated on-chip. An HD video encoder with

copy protection that supports NTSC, PAL, and SECAM with

simultaneous SD output and optional Macrovision/DCS support is

integrated on chip.

The BCM7325 incorporates Broadcom’s advanced 2D graphics engine,

offering true studio-quality text and graphics with efficient use of

memory and bandwidth.

A full range of peripheral devices is supported on the BCM7325,

including UARTs, dual ISO7816 smart card interfaces, GPIO, counters/

timers, IR Tx/Rx, UHF Rx, I2C, and SPI controllers.

2x IR/LED/Key

3x UART,

2x Smart Card,

1x UHF RX

Advanced

Audio

Processor

AVC/VC-1

MPEG-2/4

Video

Decoder

USB 2.0

Ethernet/MI

QPSK

Demod

DDR2 DRAM 32-bit

Controller

800 MHz (Data)

UMA and Non-UMA

DDR2 DRAM Interface

Dual USB 2.0

L/R Audio Out

Digital Audio

6x Video

DACs

Component

S-Video

Composite

HDMI

HDMI

Dual-MAC

Integrated PHY

RF In

Integrated

Tuner

RF In

RF Mod

Ch. 3/4

Video and

Graphics

Processing

333-MHz MIPS CPU

32K D/I Cache 128K L2

Peripherals

DiSEqC

Soft Modem

I2S In/Out

1x S/PDIF

PCM Audio

Engine

DACs

2D

Graphics

Processor

PCI/EBI

Data

Transport

BSC

EJTAG

Security

Processor

8PSK

Demod

656 Out

4x BSC

FLASH,

PCMCIA

Test ICE

Soft Modem

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