L-CSP1037 - Agere Systems, Inc. - Datasheet.Directory

Product Brief

April 2002

CSP1037—AC-Link Soft Modem Chip Set

Features

■Two-chip AC-link modem solution

— CSP1037

— CSP1037B

■Data mode capabilities:

— ITU-T V.92*: 56000 bits/s—28000 bits/s

— ITU-T V.90*: 56000 bits/s—28000 bits/s

— ITU-T V.34: 33600 bits/s—2400 bits/s

— V.44, V.42, V.42bis, and

MNP

®Class 5 data

compression

— V.32terbo, V.32bis, and fallbacks

— High compression throughput due to parallel

access directly to the host PC

■FAX mode capabilities:

— ITI-T T.31 class 1 FAX

— ITU-T V.34: 33600 bits/s—2400 bits/s (TCM)

— ITU-T V.17: 14400 bits/s, 12000 bits/s,

7200 bits/s (TCM)

— ITU-T V.29: 9600 bits/s, 7200 bits/s (QAM)

— ITU-T V.27ter: 4800 bits/s, 2400 bits/s (DPSK)

— ITU-T V.21 Channel 2: 300 bits/s (FSK)

■Complete DAA includes the following:

— AC‘97/MC‘97 2.2 compliant

— International line interface

— Compliant with FCC, CTR21, JATE, and other

PTTs

— 3.3 V to 5 V power supply

— 2400 V isolation

— Integrated ring detector

— Integrated analog front end (AFE)

— 2-wire to 4-wire hybrid

— Low-power standby mode

— Low-profile SOIC packages

■Operating system support:

—

Windows

®98, 98SE, 2000,

®4.0, ME,

— PC 2001compliant

— ACPI compliant

■Applications:

— Modem riser cards (MR)

— Modem daughter cards (MDC)

■Packaging options:

— SOIC: for standard MR and MDC applications

— TSSOP: for small foot print applications

Introduction

The CSP1037 chip set is an integrated direct access

arrangement (DAA) that provides a programmable

line interface to meet international telephone line

requirements. The CSP1037 chip set is available in

two 16-pin small outline packages (AC‘97 interface

on SCP and telephone line interface on

CSP1037B). The chip set eliminates the need for an

AFE, an isolation transformer, relays, optoisolators,

and a 2-wire to 4-wire hybrid. The CSP1037 chip set

dramatically reduces the number of discrete compo-

nents and cost required to achieve compliance with

international regulatory requirements. SCP complies

with AC‘97/MC‘97 Interface Specification Rev. 2.2.

The CSP1037 set is an ITU-T recommendation

V.92/V.44 solution. V.92 and V.44 have four innova-

tive features designed to improve modem perfor-

mance in the internet environment. The features are

as follows:

■Modem fast connect: faster start-up times.

■Modem on hold†: switch between modem and an

incoming phone call without losing the data con-

nections.

■PCM upstream: send data to central site at rates

approaching 48 kbits/s.

■Data compression enhancement focused on

today’s internet traffic.

* Actual speeds over U.S. telephone lines vary and are less than

56K, due to current FCC regulations and line conditions.

† Modem on hold functionality requires call waiting services.

2Agere Systems Inc.

Product Brief

April 2002

CSP1037—AC-Link Soft Modem Chip Set

Functional Description

Figure 1. Functional Block Diagram

The CSP1037 chip set is an integrated direct access arrangement (DAA) that provides a programmable line inter-

face to meet international telephone line requirements. The CSP1037 chip set is available in two 16-pin small out-

line packages (AC‘97 interface on CSP1037 and telephone line interface on CSP1037B). The chip set eliminates

the need for an AFE, an isolation transformer, relays, optoisolators, and a 2-wire to 4-wire hybrid. The CSP1037

chip set dramatically reduces the number of discrete components and cost required to achieve compliance with

international regulatory requirements. The CSP1037 complies with AC‘97/MC‘97 Interface Specification Rev. 2.1.

The chip set is fully programmable to meet worldwide telephone line interface requirements, including those

described by CTR21, JATE, FCC, and various country-specific PTT specifications. The programmable parameters

of the CSP1037 chip set include ac termination, dc termination, ringer impedance, and ringer threshold. The

CSP1037 chip set has been designed to meet stringent worldwide requirements for out-of-band energy, billing-tone

immunity, lightning surges, and safety requirements.

The CSP1037 chip set achieves an isolation barrier through low-cost, high-voltage capacitors in conjunction with

Agere’s proprietary signal processing techniques. These techniques eliminate any signal degradation due to

capacitor mismatches, common-mode interference, or noise coupling. All transmit, receive, control, and ring detect

data are communicated through this barrier.

5-8164 (F)

CLOCK

AC‘97

DIGITAL

INTERFACE

CONTROL

INTERFACE

ISOLATION

INTERFACE

HYBRID

AND

RING DETECT

OFF-HOOK

ISOLATION

INTERFACE

TERMINATION

XOUT

MCLK/XIN

RESET

BIT_CLK

SYNC

SDATA_IN

SDATA_OUT

ID0

ID1

GPIO_A

GPIO_B

FILT

FILT2

REF

DCT

VREG

VREG2

REXT

REXT2

RNG1

RNG2

QE2

CSP1037 CSP1037B

Agere Systems Inc. 3

Product Brief

April 2002 CSP1037—AC-Link Soft Modem Chip Set

V.92 and V.90 Technology

ITU-T recommendations V.92 and V.44 are the new

international standards for analog modems. They

improve the features of the former standards V.90 and

V.42bis with simple yet powerful changes designed to

enhance the internet experience. The new features of

V.92 are as follows:

■Fast connect, which decreases start-up times on rec-

ognized connections.

■Modem on hold*, which allows the user to place the

modem on hold when an incoming call is identified,

when call waiting services are available.

■PCM upstream, which increases the upstream trans-

mission rate up to 48 kbits/s under the best line con-

ditions.

V.44 updates the older compression standardf V.42bis.

V.42bis was created ten years ago and predates the

World Wide Web. V.44 addresses the content changes

from the last ten years and can provide significantly

increased throughput.

Although the central-site architecture is beginning to

move towards V.92, most of the existing infrastructure

only supports V.90 equipment. The CSP1037 chip set

supports both V.92 and V.90 with a fallback to V.34 for

connections where a V.92 or V.90 connectionis not

negotiated.

* This feature is dependant on the country specific call waiting ser-

vice. Not all countries are supported.

AC-Link

The AC-Link is a bidirectional, fixed rate, serial PCM

digital stream. It handles multiple input and output

audio streams and control register access employing a

time-division multiplexed (TDM) scheme. The AC-link

architecture divides each audio frame into twelve out-

going and twelve incoming data streams, each with 20-

bit sample resolution.

The AC-link serial interconnect defines a digital data

and control pipe between the controller and the codec.

The AC-link supports twelve 20-bit slots at 48 kHz on

SDATA_IN and SDATA_OUT. The TDM slot-based

architecture supports a per-slot valid tag infrastructure

that is the source of each slot’s data sets or clears to

idicate the validity of the slot data within the current

frame. For modern AFE, data streams at a variety of

required sample rates can be supported.

Isolation Barrier

The CSP1037 chip set achieves an isolation barrier

through low-cost, high-voltage capacitors in conjunc-

tion with proprietary signal processing techniques.

These techniques eliminate any signal degradation

due to capacitor mismatches, common-mode interfer-

ence, or noise coupling. All transmit, receive, control,

and ring detect data are communicated through this

barrier.

The communications link is disabled by default. The

PR bits in register 3Eh must be cleared, and the sam-

ple rate must be set in register 40h/42h. No communi-

cation between SCP and the CSP1037B can occur

until these conditions are set.

Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use orapplication. Agere,

Agere Systems, and the Agere logo are trademarks of Agere Systems Inc.

April 2002

PB01-125DMOD (Replaces PN99-096DMOD)

For additional information, contact your Agere Systems Account Manager or the following:

INTERNET: http://www.agere.com

E-MAIL: docmaster@agere.com

N. AMERICA: Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286

1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)

ASIA: Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon

Tel. (852) 3129-2000, FAX (852) 3129-2020

CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen)

JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 6778-8833, TAIWAN: (886) 2-2725-5858 (Taipei)

EUROPE: Tel. (44) 7000 624624, FAX (44) 1344 488 045

Product Brief

April 2002

CSP1037—AC-Link Soft Modem Chip Set

Ordering Information

Table 1. CSP1037 Ordering Information

* All specifications for commercial grade and extended temperature parts are the same as the specifications for the SOIC package except for

the pin configuration of the CSP1037. The SOIC and TSSOP pin configurations for the CSP1037B are the same for both packages.

MNP

is a registered trademark of Microcom, Inc.

Windows

and

Windows NT

areregisteredtrademarksand

is a trademark of Microsoft Corporation.

Device Package Comcode Remarks

CSP1037 SOIC, 16-pin, small-outline 108500117 —

CSP1037B SOIC, 16-pin, small-outline 108500109 For international use

CSP1037-16T TSSOP, 16-pin, thin shrink small-outline 109061416 Extended temperature: 0—90 °C

CSP1037B-16T TSSOP, 16-pin, thin shrink small-outline 109061390 Extended temperature: 0—90 °C

CSP1037-16T70* TSSOP, 16-pin, thin shrink small-outline 700023261 Commercial grade: 0—70 °C

CSP1037B-16T70* TSSOP, 16-pin, thin shrink small-outline 700023262 Commercial grade: 0—70 °C