CMX868 Просмотр технического описания (PDF) - CML Microcircuits

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производитель

CMX868

Low Power V.22 bis Modem

CML Microcircuits 

Low Power V.22 bis Modem

CMX868

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........................................................................... 10

1.5.1 Tx USART .............................................................................. 11

1.5.2 FSK and QAM/DPSK Modulators ......................................... 12

1.5.3 Tx Filter and Equaliser.......................................................... 13

1.5.4 DTMF/Tone Generator .......................................................... 13

1.5.5 Tx Level Control and Output Buffer..................................... 13

1.5.6 Rx DTMF/Tones Detectors.................................................... 14

1.5.7 Rx Modem Filterering and Demodulation............................ 15

1.5.8 Rx Modem Pattern Detectors and Descrambler .................. 16

1.5.9 Rx Data Register and USART ............................................... 16

1.5.10 C-BUS Interface..................................................................... 18

1.5.10.1

General Reset Command.............................. 18

1.5.10.2

General Control Register.............................. 20

1.5.10.3

Transmit Mode Register ............................... 22

1.5.10.4

Receive Mode Register ................................. 26

1.5.10.5

Tx Data Register............................................ 28

1.5.10.6

Rx Data Register ........................................... 28

1.5.10.7

Status Register.............................................. 29

1.5.10.8

Programming Register.................................. 32

1.6 Application Notes .............................................................................. 36

1.6.1 V.22 bis Calling Modem Application .................................... 36

1.6.2 V.22 bis Answering Modem Application.............................. 37

1.6.3 Reference Diagrams.............................................................. 38

1.7 Performance Specification................................................................ 39

1.7.1 Electrical Performance.......................................................... 39

1.7.1.1 Absolute Maximum Ratings..................................... 39

1.7.1.2 Operating Limits....................................................... 39

1.7.1.3 Operating Characteristics ........................................ 40

1.7.2 Packaging.............................................................................. 47

© 2004 CML Microsystems Plc

2

D/868/9

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