ST STi7141 User Manual

STi7141

HD decoder for interactive digital cable set-top box

Data Brief

Features

■ Three integrated cable receiver / demodulators

■ DOCSIS/EuroDOCSIS 2.0 cable modem with

support for DOCSIS 3.0 down-stream channel­bonding

■ SCTE-55 part 1 and 2 physical layer support for

CableCARD

■ Dual Core architecture providing mor e than

1600 DMIPS of processing performan ce

■ Linux

■ Firmware based multi-standard HD video

®

decoder for:
– H.264 / MPEG-4 AVC HP@L4
–MPEG-2 MP@HL
–SMPTE VC-1 AP@L3

■ Firmware based multi-standard audio processor

for:
– MPEG-1 I/II/III (MP3), MPEG-2 ACC (AAC-

LC)

TM

, Windows® CE and OS21 compatible

8-ch

S/PDIF

16

PCM Out

2-ch

PCM In

Audio Decoder

Players and

Interfaces

ST231

Analog

Audio

Audio
DACs

Protected JTAG

Dual Core

ST40-300

Mailboxes

64K SRAM

Resets /
Clocks /
Modes

Clock Gen

and

System

Services

3x
FDMA

DDR2
SDRAM

LMI

Out

Video In

– MPEG-4 HE AAC (aacPlus)

®

– Dolby

Digital (AC-3), Dolby® Digital Plus

■ Firmware based PTI (programmable transport

stream processor)

■ DVR support, and trick play modes

■ Dual display HD and SD

■ 2D blitter graphics with extention to pseudo 3D

and video mosaic support

■ Multi-level layered security

■ Interfaces include: USB, Ethernet, HDMI

eSATA.

Description

The STi7141 is a highly integrated SoC (system­on-chip) designed to meet the demanding needs of
the interactive cable set top box market place. The
STi7141 integrates all the major system functions
into a single device, and provides world leading,
multi-layer, advanced security technologies to
protect valuable video and audio assets.

Serial ATA

HDD, int/ext

Digital

DVP

eSATA

Interface

USB

USB

1.1

USB

USB

2.0

USB

USB

1.1

USB

USB

2.0

STB peripherals

and external interrupts

Comms

GPIOs

ILC

2 x I/F

SmCard

3x

UARTs

IR Tx/Rx

UHF Rx

Serial

FLASH

SPI

7x

SSC/I2C

PWM

TM

,

STBus

VTG0
VTG1

Aux video

display

DENC

DVO

HDMI

Digital Video Output

TMDS

DEI

Main video

display

PCI

EMI

EMI/MPX/PCI

EMPI

DSMA USMA
DOCSIS 2.0+ MAC

QAM/
FEC

QAM/
FEC

QAM/

RC

FEC

Digitized Cable Channels

TSMerger

MCARD
Interface

PTI
PTI

Blitter

HD

Video Decoder

ST231

2x

Ethernet

MAC

GMII / MII

Display

Main/Aux

COMPOSITOR
Cursor

3xGDP

Router and
Formatter

6DACs

Analog Video

Output

(HD/SD)

September 2008 Rev 1 1/6

For further information contact your local STMicroelectronics sales office.

www.st.com

6

Applications STi7141

1 Applications

The STi7141 is a low-cost, networkable, HDTV set-top box device, with an embeded
DOCSIS cable modem capable of providing DSG (DOCSIS set-top gateway), interactive
multimedia and internet access for the digital cable mar ket.

The STi7141 provides an enhanced performance, lower-cost replacement to the two-chip
solution STv0498 and STi7109.

The following figures describe typical set-top box applications based on the STi7141. These
applications maintain a high degree of software compatibility with set-top box designs based
on the STv0498 and STi7109.

Figure 1. STi7141 applicatio n: HD input SD disp lay c able set-top box pla tform with DOCSIS 2.0

DDR 2 DDR 2

Cable

MSCC

RJ45

USB 2

USB

Power supply
components

Silicon
tuner

Silicon
tuner

PGA

MoCA
MAC
and PHY

Ethernet
PHY

Power on
reset

Secure
micro

LMI

FAT1

FAT2

STv0130

RDC

GMII

MSCC

LMI

Composite

S-Video

Audio

S/PDIF

Ch 3/4

Filter

Opto

RF

Comp

S-Vid

Audio

S/PDIF

STi7141

MII

USB 2.0

USB 1.1

USB 1.1

EMI

Flash

USB 2.0

IR

Opto

USB 2

IR

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