Intel 536EPXX - PRELIMINARY Datasheet

536EPXX

Host Accelerat ed Mo d em 56K V.92 Chipset

Preliminary Datasheet

Product Features

■ Merges benefits from software and

hardware modems

■ Uses host’s CPU without degrading

performance

■ Distributes functions optimally between

CPU and DSP

■ Cost savings

—CPU eliminates need for controller chip
—Reduced board size
—Superior price/performance ratio

■ Data modulation

—Data rates up to 56 kbps†
—ITU- V.92, V.90 compliant
—ITU-T V.34 (33,600 to 2,400 bps)
—ITU-T V.32 bis, V.23, V.22 bis, V.21
—Bell‚ 212A and 103
—Error correction: ITU V.42 and MNP‚ 2–

4

—Data compression: ITU V.44, V.42 bis

and MNP‚ 5

■ Fax modulation

—ITU-T V.17, V.26ter, V.29 to 14,400 bps
—Fax Class 1 commands

■ PCI

—PCI 2.2-compliant

■ PC telephony

—International telephony support
—V oice compression: ADPCM, linear, and

CL1

—4800, 7200, 8000, 9600, and 11025

samples/sec.

—Full-duplex, echo-cancelled digital

speakerphone

—Telephone emulation for headset

applications
—IS-101 Voice commands
—ITU-V.80 for videoconferencing

■ Power requirements

—DSP 3.3 V Pad, 1.3 V Core
—Automatic sleep and wake-up modes
—ACPI (advanced configuration power

interface)

■ Packaging

—DSP: 128-pin LQFP
—AFE: 44-pin VQFP

■ Exceeds Microsoft*‚ PC 00 requirements

■ Microsoft‚ Windows *‚ TAPI-compliant

■ AT command-driven

† Maximum speed allowed by the FCC is 53.333 kbps.

Intel Conf id e ntial Order Number: 273503-001

June 2001

Notice: This document contains preliminary information on new products in production. The
specifications are subject to change without notice. Verify with your local Intel sales office that
you have the latest datasheet before finalizing a design.

2 Intel Confidential Preliminary Datasheet

Information in this document is provided in connection with Intel® products. No license, express or implied, by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Intel’s Terms and Conditions of Sale for such products, Intel assumes no liability
whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to
fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not
intended for use in medical, life saving, or life sustaining applications.

Intel is a trademark or registered trademark of Intel Corporation or its subsidiaries in the United States and other countries.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for

future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them.
The 536EPXX may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current

characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling

1-800-548-4725 or by visiting Intel’s website at http://www.intel.com.
Copyright © Intel Corporation, 2001
*Third-party brands and names are the property of their respective owners.

Host Accelerated Modem 56K V.92 Chipset — 536EPXX

Preliminary Datasheet Intel Confidential 7

1.0 Overview

The software upgradable 536EPXX chipset and reference design from Intel is targeted at modem
and computer manufacturers. This new product is a leap forward in technology, performance and
cost savings. The 536EPXX is a Host Accelerated Modem solution that combines and optimizes
the best features from software and hardware modems. This unique hybrid delivers superior
performance and is a price competive modem.

The 536EPXX uses the host computer’s CPU to replace the modem’s controller without degrading
CPU performance. Since today’s CPUs are well equipped to handle Digital Signal Processing
(DSP), some of the DSP functions are diverted to the CPU. However, to prevent a decrease in CPU
and modem performance, a separate and less expensive DSP chip is used to share the load.
Maximum system and modem performance is maintained by splitting the processing optimally
between the CPU and the DSP.

Unlike software modems, there is no performance penalty because the CPU does not handle all of
the controller and DSP functions. Instead, functions have been strategically optimized for
accelerated performance by either the CPU or the DSP depending on which device can perform
them most efficiently—delivering a price-performance ratio neither software- nor hardware-only
modems can match.

Optimizing CPU usage in this manner eliminates the need for a controller and reduces the size of
the DSP, thereby reducing part count, board size and the amount of silicon us ed. Th ese cost sav ing
advantages make the 536EPXX a superior high-performance and feature-rich alternative to
software modems.

With an integrated PCI interface, this ITU-V.92 solution provides a complete set of standard data/
fax/voice and speakerphone features. Effective data receive rates of up to 56K (53.333 kbps FCC
max.) ensures interoperability with major Internet service providers around the world. Chipset
features also include ITU-V.80 videoconferencing. The 536EPXX exceeds Microsoft* PC 00
specifications for Windows* and is TAPI and PCI 2.1 compliant. It satisfies legacy applications
and supports all requirements for PC-based communications, inclu ding all sta ndar d AT commands
for data, Class 1 fax and IS-101 voice.

1.1 Versatile 56K Platform

With many advanced features already built in, the 536EPXX is a versatile platform for future
development. By using the host computer’s CPU, the 536EPXX can leverage the latest
developments in CPU technology. These advances can be taken advantage of quickly because the
controller code can be modified in a “C” code development environment. Thus, new features and
products can be brought to market faster and less expensively than ever before. And end users can
easily upgrade to the newest communication technology by downloading and installing software
upgrades directly from the modem or computer manufacturer’s internet site.

1.2 Integrated PCI & Mini-PCI Interface

The integrated design supports PCI and Mini-PCI interfaces, and allows the device to transfer data
from the DSP to the host system’s CPU faster than ISA or s erial s olutions. The integrated interface
also eliminates the ISA bridge chip requirement which helps to reduce part count, board space and
cost.

536EPXX — Host Accelerated Modem 56K V.92 Chipset

8 Intel Confidential PreliminaryDatasheet

1.3 Satisfies Legacy Applications

The 536EPXX supports all PC-based communication requireme nts. Its robust host-based con troller
software and powerful DSP support all standard AT commands for data, Class 1 fax and IS-101
voice.

1.4 Comprehensive Telephony Features

Voice telephony is becoming increasingly important. The 536EPXX offers a complete telephony
interface with Caller ID, voice mail, answering machine capabilities, tone generation and
detection, call progress control, telephone emulation and full-duplex digital speakerphone. All
voice features are fully compliant with Microsoft’ s Unimodem V and TAPI standards, and all voice
commands comply with IS-101 voice command standards. Intel also provides DAA design
recommendations that support international telephony applications.

1.5 Refe rence Design Available

Intel provides a reference design that demonstrates chipset applications for several common
configurations. The design documentation includes a schematic (OrCAD), bill of materials, block
diagram and a description of operation.

1.6 Minimal Component Design

The 536EPXX was designed to reduce part count, board area and the amount of silicon used. These
design considerations significantly reduce the cost of the 536EPXX without sacrificing quality or
performance. The 536EPXX solution is a sleek, compact and cost effective alternative to both
software- and hardware-only modems.

1.7 Reduced EMI/RFI Emissions

A single low-frequency crystal serves as a clock for the DSP in the 536EPXX chipsets. The single­crystal design minimizes high-frequ ency harmon ics and simpl ifies EMI/RF I design cons ideratio ns.

Host Accelerated Modem 56K V.92 Chipset — 536EPXX

Preliminary Datasheet Intel Confidential 19

Figure 3. Functional Block Diagrams

536EPU/G

TIP

RING

HOST

COMPUTER

DSP

DQ82536

PCI BUS

NVRAM

Silicon

536EPA

TIP

RING

HOST

COMPUTER

DSP

DQ82536

PCI BUS

NVRAM

DAA

AFE

MD1724

CODEC/DAA

MICROPHONE / SPEAKER

(OPTIONAL)

+