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

SmartACFL



Doc. No. 100444A

Conexant

3

Proprietary Information

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.

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.

Applications

•

PC Cards

•

Embedded systems

•

Serial box modems

•

Set top boxes

•

Point of sales terminals

•

Remote monitoring and data collection systems

Modem Data Pump (MDP)

P9373: 100-Pin TQFP

Voice Codec (VC)

20437: 32-Pin TQFP

(Optional)

SPEAKER

(Mic/Speaker)

Interface

(Optional)

TIP

RING

Electronic

Inductor,

Diode Bridge,

Protection &

EMI,

Impedance

Components

SmartDAA

Interface

Modem

Data Pump

(MDP)

Telephone

Line

Digital Speaker

Circuit (Optional)

PCCard/Parallel/

Serial DTE

Interface

MIC

SPEAKER

MD251F2_FID

SOUNDUCER

Digital

Isolation

Barrier

(DIB)

(OEM

supplied)

Line Side Device (LSD)

20463: 32-Pin TQFP

Line

Side

DIB

Interface

(LSDI)

Codec

Telephone

Line

Interface

DAA Hardware

HS Hybrid

Components

(Optional)

Cellular

Interface

GSM

Interface

RAM

1M (128K x 8)

Central

Processor

Unit (MCU)

SPEAKER

Serial EEPROM

2K (256 x 8) to

32K (4K x 8)

(Optional)

ROM/Flash ROM

2M (256K x 8)

4M (512K X 8)*

* = GSM Support

MCU

Interface

MDP

Interface

Internal

RAM

Serial

EEPROM

Interface

Expansion

Memory

Bus

Interface

Cellular and

GSM

Interface

Host

Interface

Microcontroller Unit (MCU)

L2702: 128-Pin TQFP

Rectifier and

Filter

Components

Figure 1. SmartACFL Modem Major Interfaces