ST STi7100 User Manual

STi7100

Low cost HDTV set-top box decoder for H.264/AVC and MPEG-2

Data Brief

Features

■ The STi7100 is a single-chip, high-definition

STB decoder including: – ST40 CPU core, 266 MHz – dual ST231 CPU cores for audio and video

decoding, both 400 MHz – transport filtering and descrambling – video decoder: H.264/AVC and MPEG-2 – graphics engine and dual display:

high-definition (HD) and

standard definition (SD) – audio decoder

ST40 core 266 MHz

UDI

MMU

16 K Icache

Int. control

32 K Dcache

Video

DDR

SDRAM

LMI

System

LMI

5 x 2-ch

PCM out

2-ch

PCM in

Audio decoder

and interfaces

AudioL AudioR

Audio DACs

ST231

core

S/PDIF

■ The STi7100 also features the following

embedded interfaces: –USB 2.0 – DVI/HDMI output – digital audio and video auxiliary input – modem – serial ATA

video in

interface

Digital

video input

Serial

ATA

USB

2.0

2x I/F

SmCard

6x GPIO

Peripheral I/O

and external interrupts

ILC

interface

UARTs

Tx/Rx

MAFE

PWM

SSCs

STBus

GDP

PDES

TSmerger/router

TSIN1

TSIN0

NRSS-A

PTI

TS I/O

generator

and system

services

Clock

FDMA

DiSEqC

DAA

Video decoder

H.264/AVC,

MPEG2

ST231

core

DVI-HDCP

HDMI

TMDS main video

output (HD)

2D gamma

blitter

Output stage

Main video output (HD)

YPbPr

CUR

DACs

Display

compositor

DENC

DACs

Aux video

output (SD)

YC/CVBS

GDP

LMU

Main video

display

Aux video

display

EMI

Flash

peripherals

December 2006 Rev 2 1/9

For further information contact your local STMicroelectronics sales office.

www.st.com

Description STi7100

1 Description

The STi7100 is a new generation, high-definition set-top box decoder chip, and provides very high performance for low-cost HD systems. With enhanced performances over the STi7710, it includes an H.264/AVC decoder for new low-bitrate applications, as well as dualdecode MPEG-2 capability.

Based on the Omega2 (STBus) architecture, this system on chip is a full back-end processing solution for digital terrestrial, satellite and cable high-definition set-top boxes compliant with ATSC, DVB, DIRECTV, DCII, OpenCable and ARIB BS4 specifications.

The STi7100 demultiplexes, decrypts and decodes a single HD or SD video stream with associated multichannel audio. Video is output to two independently formatted displays: a full resolution display intended for a TV monitor, and a downsampled display intended for a VCR, or alternatively a second SD TV. Connection to a TV or display panel can be via an analog component interface or a copy protected DVI/HDMI interface. Composite outputs are provided for connection to the VCR with Macrovision protection. Audio is output with optional PCM mixing to an S/PDIF interface, PCM interface or via integrated stereo audio DACs.

Digitized analog programs can also be input to the STi7100 for reformatting and display.

The STi7100 includes a graphics rendering and display capability with a 2D graphics accelerator, two graphics planes and a cursor plane. A dual display compositor provides mixing of graphics and video with independent composition for each of the TV and VCR outputs.

The STi7100 includes a stream merger to allow five different transport streams from different sources to be merged and processed concurrently. Applications include DVR time shifted viewing of a terrestrial program while acquiring an EPG/data stream from a satellite or cable front end.

The flexible descrambling engine is compatible with required standards including DVB, DES, AES and Multi2.

The STi7100 embeds a 266 MHz ST40 CPU for applications and device control. A dual DDR1 SDRAM memory interface is used for higher performance, to allow the video decoder the required memory bandwidth for HD H.264 decoding and sufficient bandwidth for the CPU and the rest of the system. A second memory bus is also provided for flash memory storing resident software and for connection of peripherals.

A hard-disk drive (HDD) can be connected either to the serial ATA interface or as an expansion drive via the USB 2.0 port. The USB port can also be used to connect to a DOCSIS 2.0 CM gateway for interactive cable applications.

The STi7100 is supported by STMicroelectronics’ STAPI software, and is compatible with several other related devices such as the STi7109.

2/9

STi7100 Description

Figure 1. Low-cost satellite HD set-top box

IR Tx/Rx

STV0299

+STB6000

Transport stream in

2 x 128 Mbit

DDR1

2 x 128 Mbit

DDR1

STi7100

QPSK Rx

PTSN

MAFE I/F

Smart

cards

Flash

Figure 2. Low-cost cable HD set-top box with return channel

CableCARD™

interface

Flash

2 x 128 Mbit

DDR1

RGB/YPbPr/ HDMI

CVBS/YC

VCR

2 x 128 Mbit

DDR1

Broadcast

IB data/

OOB

Tuner and SAW filter

Diplex filter

Upstream

PGA

STV0498

Cable

front end

QAM/QPSK

transceiver

Tx/Rx

Smart

cards

EMI

STi7100

RS232

RGB/YPbPr/ HDMI

CVBS/YC

VCR

3/9

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