set-top box solutions

Satellite

For a complete HDTV hardware design, the only additional

components required are a tuner, demodulator, double data rate

(DDR-2) synchronous dynamic random access memory (SDRAM),

and flash memory ICs. This level of integration enables a low-cost

system bill of materials and allows the flexibility of supporting

different modulation and compression technologies with a low cost,

highly featured MPEG solution for dual TV set-top box

(STB) applications.

CX24501 System Block Diagram

The CX24501 IC is integrated into a fully engineered interactive

TV STB reference development system that implements third-

party interactive middleware/real-time operating system (RTOS)

platforms and provides a complete set of STB low-level drivers.

The STB development platform hardware is designed with a flexible

architecture that supports multiple front end tuner/demodulator

daughter boards. A mature and robust hardware abstraction layer

is assured by re-use of core driver libraries developed over multiple

generations of production MPEG ICs. Support for Nucleus+ and

Linux OS is included, with the software architected to allow easy

porting to other real-time OS.

16

optional

Smart Card Reader

Smart Card Reader

Buttons/LEDs

IR Blaster

IR RCU Detect

CVBS

S/PDIF

Audio Out

SC1

PCI

HDMI

HDMITx

PCI

GPIO

SC0

IR OUT

IR IN

USB0

USB2

USB1

USB2

USB1.1

USB2

M-Card

M-Card

RJ-11

CVBS

YC

Y/C

YPrPb

YPrPb

DDR2-SDRAM

SDRAM1

TSIN0

TSIN1

TSIN2

CX24501

MPEG

Decoder

S/PDIF

L+R Stereo

Modem

CX20548

DAA

32

DDR2-SDRAM

SDRAM0

64

Flash

I/0 Bus

MII

MII

MII

RJ-45

10/100 PHY

Transport

Stream

Sources/

Sinks

V.92