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P9373-11

SmartACFL Modem

Unspecified 

V.90/K56flex Modem Device Sets with SmartDAA Technology for Low Power Applications

SmartACFL

Introduction (continued)

Applications

The optional Voice Codec (VC) supports voice/full-

duplex speakerphone (FDSP) operation with

interfaces to a microphone and speaker and to a

telephone handset/headset. The optional RCDSVD

Speech Codec Processor (SCP) supports DSVD.

The modem operates by executing firmware from

external 1 Mbit (128k X 8) RAM and 2 Mbit (256k X

8) ROM/Flash ROM. The 33S and 14S models can

alternatively use external 1 Mbit or 2 Mbit

ROM/Flash ROM and the MCU’s internal 32K X 8

RAM. For GSM support the ROM size is doubled.

• PC Cards

• Embedded systems

• Serial box modems

• Set top boxes

• Point of sales terminals

• Remote monitoring and data collection systems

Accelerator kits and reference designs are available

in electronic form to minimize application design time

and costs. The design package includes schematics,

bill of materials (BOM), board layout files in Gerber

format, and complete documentation. The design is

pretested to pass FCC Part 15, Part 68, and CTR 21

for immediate manufacturing.

Microcontroller Unit (MCU)

L2702: 128-Pin TQFP

Central

Processor

Unit (MCU)

MDP

Interface

PCCard/Parallel/

Serial DTE

Interface

Host

Interface

Internal

RAM

Cellular and

GSM

Interface

Serial

EEPROM

Interface

Modem Data Pump (MDP)

P9373: 100-Pin TQFP

SmartDAA

Interface

Digital

Isolation

Barrier

(DIB)

(OEM

supplied)

Rectifier and

Filter

Components

DAA Hardware

Line Side Device (LSD)

20463: 32-Pin TQFP

Line

Side

DIB

Interface

(LSDI)

Codec

Telephone

Line

Interface

Electronic

Inductor,

Diode Bridge,

Protection &

EMI,

Impedance

Components

Telephone

Line

TIP

RING

MCU

Interface

Modem

Data Pump

(MDP)

Voice Codec (VC)

20437: 32-Pin TQFP

(Optional)

Serial EEPROM

SPEAK2E3K2R(K25(46Kx x8)8)to

(Optional)

HS Hybrid

Components

(Optional)

S(PMEIicnA/tSKerpEfeaRackeer)

(Optional)

Digital Speaker

Circuit (Optional)

MIC

SPEAKER

Cellular

Interface

GSM

Interface

SOUNDUCER

Expansion

Memory

Bus

Interface

RAM

1M (128K x 8)

ROM/Flash ROM

2M (256K x 8)

4M (512K X 8)*

* = GSM Support

Doc. No. 100444A

Figure 1. SmartACFL Modem Major Interfaces

Conexant

Proprietary Information

MD251F2_FID

3

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