CX86500-67 데이터 시트보기 (PDF) - Conexant Systems

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CX86500-67

V.92/V.34/V.32bis Modem in 28-Pin or 38-Pin TSSOP with CX20493 SmartDAA®

Conexant Systems 

CX86500 SCXV.xx Modem Data Sheet

Contents

1. Introduction..........................................................................................................................................1-1

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

1.2 Features .......................................................................................................................................................................... 1-3

1.2.1 Applications.................................................................................................................................................... 1-4

1.3 Technical Overview......................................................................................................................................................... 1-4

1.3.1 General Description ........................................................................................................................................ 1-4

1.3.2 Embedded MCU Firmware.............................................................................................................................. 1-4

1.3.3 Operating Modes ............................................................................................................................................ 1-4

1.3.3.1 Data Modes ................................................................................................................................ 1-4

1.3.3.2 V.44 Data Compression.............................................................................................................. 1-5

1.3.3.3 Synchronous Access Mode (SAM) - Video Conferencing.......................................................... 1-5

1.3.3.4 Voice Pass-Through Mode ......................................................................................................... 1-5

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

1.3.4 Reference Designs.......................................................................................................................................... 1-7

1.4 Hardware Description ..................................................................................................................................................... 1-8

1.4.1 CX86500 Modem............................................................................................................................................ 1-8

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

1.4.3 CX20493 SmartDAA Line Side Device............................................................................................................ 1-8

1.5 Commands ..................................................................................................................................................................... 1-9

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 .......................................................................................................................... 2-2

2.3.1

2.3.2

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

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

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

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

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

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

2.3.7 Connection Speeds......................................................................................................................................... 2-3

2.3.8 Automode ....................................................................................................................................................... 2-3

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

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

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

2.4.3 Escape Sequence Detection............................................................................................................................ 2-4

2.4.4 BREAK Detection ............................................................................................................................................ 2-4

2.4.5 Telephone Line Monitoring............................................................................................................................. 2-4

102287F

Conexant

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