ESS Technology, Inc.

SAM0358-052201

1

ES4428/ES4427

Web/DVD Set-Top Box Solution

Product Brief

DESCRIPTION

The ES4428/ES4427 Web/DVD Internet set-top box chipset

seamlessly combines both Web browser technology and DVD

technology into a highly integrated, low-cost solution for the next

generation of Internet set-top boxes for home use.

The ES4428, which is based on ESS’s Programmable

Multimedia Processor (PMP) device architecture, includes a

programmable internal RISC processor core that makes it

adaptable for use in embedded systems applications such as

set-top boxes. The ES4427 companion chip supplies proper

video sync capabilities and performs NTSC- and PAL-based

video encoding and decoding as necessary to provide broadcast

quality video to the television screen.

The ES4428 DVD processor integrates MPEG-based audio and

video data stream decoding for DVD/VCD/SuperVCD playback,

DVD system navigation and Dolby AC-3 decoding into a single

device. The ES4428 demuxes the incoming DVD audio and

video data streams from the DVD loader using its glueless 8/16-

bit parallel interface, which is hardware-compatible with many

DVD loaders. The ES4428 also supports both 8- and 16-bit

Flash/Read-Only Memory (ROM) and 8- and 16-bit Synchronous

DRAM (SDRAM) memory I/O operations.

The ES4428 controls data I/O transactions to and from the

ES4427 companion chip through its 8-bit Device Serial Connect

(DSC) parallel bus interface. The ES4428 also provides a 16-bit

wide

hardware

interface

with

V.90-compatible

modem

subsystems incorporated into the set-top box design.

The ES4427 incorporates a multi-standard TV encoder that

supports both the NTSC and PAL formats and CCIR-601 non-

square operations. Two microphone ADCs and PLL clock

synthesizers are incorporated in the ES4427 device architecture.

The ES4427 includes an I/O-mapped auxiliary expansion port

that interfaces with the ES4428. Four pins of the port can be

configured as edge-triggered interrupts, supporting critical

functions, such as handling remote control and modem interrupt

requests, DVD/VCD loader resets and modem board resets.

Command and register accesses are issued through the

DSC interface from the ES4428 DVD processor to the

ES4427 through the device serial communication (DSC)

interface for accessing the internal registers of the

ES4427. The DSC interface port is comprised of three

interface signals, the strobe (DSC_S), data (DSC_D), and

clock (DSC_C).

The DSC port is selected when the DSC strobe goes high

and latches the data at the rising edge of the clock. Each

16-bit DSC transfer is comprised of an address followed

by data.

The ES4428 is available in an industry-standard 208-pin Plastic

Quad Flat Pack (PQFP) package, while the ES4427 is available

in an industry-standard 100-pin PQFP package.

ES4428 FEATURES

subsystem implemented

supported

keyboard

blending.

subtitle and closed captioning functions.

compatibility available with Video CD / Super VCD player

configuration

and MP3 compatibility available with Super VCD / DVD player

configuration

ES4427 FEATURES

interupts for data read/write interfacing with ES4428

required clocks for video encoder, video DACs and video

processor

SOFTWARE SUPPORT

e-mail protocols defined by RFC 821, RFC 1157and RFC 2449

protocol defined by RFC 1945, RFC 2068 and RFC 2616

protocols defined by RFC 791 and RFC 793

MPEG-1/2 and H.261 video streaming protocols defined by

RFC 2032, RFC 2038 and RFC 2250

*.wav audio file formats and *.gif, *.jpg and *.xbm graphic file

formats, JavaScript 1.1, SSL 2.0 and SSL 3.0

Big 5/GB Chinese and Japanese fonts

keyboard