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CX20437VC

SmartSCM Modem

Conexant Systems 

SmartSCM Modem Data Sheet

Contents

1 INTRODUCTION................................................................................................................................................. 1-1

1.1 Overview................................................................................................................................................... 1-1

1.2 Features ................................................................................................................................................... 1-4

1.2.1 General Modem Features .......................................................................................................... 1-4

1.2.2 SmartDAA Features ................................................................................................................... 1-5

1.2.3 Applications................................................................................................................................ 1-5

1.3 Technical Overview .................................................................................................................................. 1-5

1.3.1 General Description ................................................................................................................... 1-5

1.3.2 MCU Firmware ........................................................................................................................... 1-5

1.3.3 Operating Modes........................................................................................................................ 1-6

Data/Fax Modes ................................................................................................................ 1-6

Synchronous Access Mode (SAM) - Video Conferencing................................................. 1-6

Worldwide Operation ........................................................................................................ 1-6

TAM Mode......................................................................................................................... 1-7

Voice/Speakerphone Mode (S Models)............................................................................. 1-7

1.3.4 Reference Design ...................................................................................................................... 1-7

1.3.5 GSM (Parallel Host Interface) .................................................................................................... 1-7

1.4 Hardware Description............................................................................................................................... 1-7

1.4.1 CX88168 Single Chip Modem .................................................................................................... 1-7

1.4.2 Digital Isolation Barrier............................................................................................................... 1-8

1.4.3 CX20463 SmartDAA Line Side Device ...................................................................................... 1-8

1.4.4 CX20437 Voice Codec............................................................................................................... 1-8

1.5 Commands ............................................................................................................................................... 1-8

2 TECHNICAL SPECIFICATIONS......................................................................................................................... 2-1

2.1 Serial DTE Interface Operation ................................................................................................................ 2-1

2.1.1 Automatic Speed/Format Sensing ............................................................................................. 2-1

2.2 Parallel Host Bus Interface Operation ...................................................................................................... 2-1

2.3 Establishing Data Modem Connections ................................................................................................... 2-1

Telephone Number Directory ............................................................................................ 2-1

Dialing ............................................................................................................................... 2-1

Modem Handshaking Protocol .......................................................................................... 2-2

Call Progress Tone Detection ........................................................................................... 2-2

Answer Tone Detection..................................................................................................... 2-2

Ring Detection................................................................................................................... 2-2

Billing Protection ............................................................................................................... 2-2

Connection Speeds........................................................................................................... 2-2

Automode.......................................................................................................................... 2-2

2.4 Data Mode................................................................................................................................................ 2-3

Speed Buffering (Normal Mode) ....................................................................................... 2-3

Flow Control ...................................................................................................................... 2-3

Escape Sequence Detection............................................................................................. 2-3

BREAK Detection.............................................................................................................. 2-3

Telephone Line Monitoring................................................................................................ 2-3

Send SPACE on Disconnect (V.22 bis and Below)........................................................... 2-3

Fall Forward/Fallback (V.90/K56flex/V.34/V.32 bis/V.32) ................................................. 2-3

Retrain............................................................................................................................... 2-3

Programmable Inactivity Timer ......................................................................................... 2-3

DTE Signal Monitoring (Serial DTE Interface Only) .......................................................... 2-4

2.5 Error Correction and Data Compression .................................................................................................. 2-4

V.42 Error Correction ........................................................................................................ 2-4

MNP 2-4 Error Correction.................................................................................................. 2-4

V.42 bis Data Compression .............................................................................................. 2-4

MNP 5 Data Compression ................................................................................................ 2-4

100490C

Conexant

iii

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