Introduction

STi5251

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Doc ID 022143 Rev 1

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Introduction

The STi5251 uses ST’s state of the art process technology to provide a cost-effective SD

advanced decoding set-top-box SoC. It is a highly integrated solution suitable for DVB-C or

DVB-T/IP STB markets worldwide.

The STi5251 provides a solution for operators to specify a range of cost-effective SD STBs

including high-volume broadcast-only zapper STBs, interactive STBs and dual-stream DVR

and time-shift capable STBs. Content delivery is possible using broadcast and Ethernet

connectivity (Hybrid STBs).

The STi5251 is optimized for secure Pay-TV applications with integrated DVB, DES, AES,

TDES and ICAM descramblers and smartcard interfaces. It also has advanced security

features to further safeguard operator and content investment including secure control

words, software integrity checking, JTAG locking and DRM support.

The STi5251 offers high-performance CPU and graphics subsystem, which targets the full

range of software/UI platforms from basic OS/program guide to demanding middlewares,

such as MHP.

Features

Benefits

Combines a DVB-C/DVB-T demodulator with

STB decoding and display functions

This highly integrated SoC helps to reduce board

area and manufacturing cost, allowing cost

effective and small-size STBs to be designed for

DVB-C/DVB-T networks

Serial Flash-based secure boot and code

storage, integrated voltage regulator,

23 mm x 23 mm x 1.7 mm PBGA package

Enables further BOM optimization and cost

reduction of advanced decoding SD STBs

ST40-300 applications CPU @450 MHz, 32 K I

cache, 32 K D cache

Up to 800 DMIPs superscalar performance from a

single CPU core, using standard tools and

operating systems (Linux, OS21)

STMicroelectronics' DELTA video decoding

system with ST231 processor

Decoding of advanced standard definition MPEG2,

H.264 and VC-1/WMV9 streams, with the

performance and flexibility for web-based content

decoding such as Flash, DivX, MJPEG, XviD and

Real

Dual USB 2.0 hosts, Ethernet MAC with

MII/RMII and TMII, SD-MMC/SDIO

Extensive high-speed connectivity for the widest

range of STB peripherals, such as Flash drives,

external HDDs, home network controllers (for

example MoCA, Wi-Fi), memory cards

Low power process, design and architecture

Best in class, low-power standby mode, to meet

emerging energy standards for STBs. Dynamic

configuration of power to individual subsystems

enables power-efficient active standby modes

Advanced 2D graphics and display subsystem

and 480p/576p display output

Allows visually appealing user interfaces and

video-rich navigation to be offered to consumers,

while high-quality progressive output can be

watched on the latest displays