DS28-L189-061 Ver la hoja de datos (PDF) - Conexant Systems

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DS28-L189-061

SmartSCM Modem

Conexant Systems 

SmartSCM Modem Data Sheet

1.2 Features

1.2.1 General Modem Features

• Data modem

− ITU-T V.90/K56flex (/56 models)/V.34 (/56 and /33 models), V.32bis, V.32, V.22 bis, V.22, V.23, and V.21;

Bell 212A and Bell 103

− V.42 LAPM and MNP 2-4 error correction

− V.42 bis and MNP 5 data compression

− MNP 10EC™ enhanced cellular performance

− V.250 and V.251 commands

• V.22 bis fast connect

• Analog cellular direct connect using optional CX20437 Voice Codec (S models)

• GSM cellular direct connect (parallel interface only)

• Fax modem send and receive rates up to 14.4 kbps

− V.17, V.29, V.27 ter, and V.21 channel 2

− EIA/TIA 578 Class 1 and T.31 Class 1.0, and EIA/TIA 578 Class 2 commands

• V.80 synchronous access mode supports host-controlled communication protocols with H.324 interface support

• Interfaces to optional external ROM/flash ROM and/or to optional external serial EEPROM and RAM for customized modem

firmware

• Downloadable Architecture

− Downloadable MCU firmware from the host/DTE to optional external flash ROM

− Downloadable MDP code modules from the MCU transparent to the host

• Data/Fax/Voice call discrimination

• Hardware-based modem controller

• Hardware-based digital signal processor (DSP)

• Worldwide operation

− Complies to TBR21 and other country requirements

− Caller ID detection

− Call progress, blacklisting

− Internal ROM includes default values for 29 countries

• Caller ID and distinctive ring detect

• Telephony/TAM

− V.253 commands

− 2-bit and 4-bit Conexant ADPCM, 8-bit linear PCM, and 4-bit IMA coding

− 8 kHz sample rate

− Concurrent DTMF, ring, and Caller ID detection

• Full-duplex speakerphone (FDSP) mode using optional CX20437 Voice Codec (S models)

− Microphone and speaker interface

− Telephone handset or headset interface

− Acoustic and line echo cancellation

− Microphone gain and muting

− Speaker volume control and muting

• Built-in host/DTE interface with speeds up to 230.4 kbps

− Parallel 16550A UART-compatible interface

− Serial ITU-T V.24 (EIA/TIA-232-E) logical interface

• Direct mode (serial DTE interface)

• Flow control and speed buffering

• Automatic format/speed sensing

• Serial async data; parallel async data

• Thin packages support low profile designs (1.6 mm max. height)

− CX88168 SCM: 128-pin TQFP

− CX20463 LSD: 32-pin TQFP

− CX20437 VC: 32-pin TQFP

• +3.3V operation with +5V tolerant digital inputs

• Typical power use

SCM and LSD: 470 mW (Normal Mode); 140 mW (Sleep Mode)

VC: 5 mW (Normal Mode)

1-4

Conexant

100490C

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