CMX867(2000) Просмотр технического описания (PDF) - CML Microsystems Plc

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Компоненты Описание

производитель

CMX867
(Rev.:2000)

Low Power V.22 Modem

CML Microsystems Plc 

Low Power V.22 Modem

CMX867

Section

CONTENTS

Page

1.1 Brief Description ..................................................................................1

1.2 Block Diagram......................................................................................3

1.3 Signal List ............................................................................................4

1.4 External Components ..........................................................................5

1.4.1 Ring Detector Interface ...........................................................6

1.4.2 Line Interface...........................................................................7

1.5 General Description.............................................................................9

1.5.1 Tx USART...............................................................................10

1.5.2 FSK and DPSK Modulators...................................................11

1.5.3 Tx Filter and Equaliser ..........................................................12

1.5.4 DTMF/Tone Generator...........................................................12

1.5.5 Tx Level Control and Output Buffer .....................................12

1.5.6 Rx DTMF/Tones Detectors ....................................................13

1.5.7 Rx Modem Filterering and Demodulation ............................14

1.5.8 Rx Modem Pattern Detectors and Descrambler...................15

1.5.9 Rx Data Register and USART................................................15

1.5.10 C-BUS Interface .....................................................................17

1.5.10.1

General Reset Command ..............................17

1.5.10.2

General Control Register ..............................19

1.5.10.3

Transmit Mode Register................................21

1.5.10.4

Receive Mode Register .................................24

1.5.10.5

Tx Data Register ............................................26

1.5.10.6

Rx Data Register............................................26

1.5.10.7

Status Register ..............................................27

1.5.10.8

Programming Register ..................................30

1.6 Application Notes ..............................................................................34

1.6.1 V.22 Calling Modem Application ..........................................34

1.6.2 V.22 Answering Modem Application ....................................35

1.7 Performance Specification ................................................................36

1.7.1 Electrical Performance..........................................................36

1.7.1.1 Absolute Maximum Ratings .....................................36

1.7.1.2 Operating Limits .......................................................36

1.7.1.3 Operating Characteristics ........................................37

1.7.2 Packaging ..............................................................................44

© 2000 Consumer Microcircuits Limited

2

D/867/1

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