CMX644A 查看數據表（PDF） - CML Microsystems Plc

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CMX644A

V.22 and Bell 212A Modem

CML Microsystems Plc 

V22 and Bell 212A Modem

CMX644A

Section

CONTENTS

Page

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

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

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

1.4 External Components ..........................................................................6

1.5 General Description.............................................................................7

1.5.1 ‘C-BUS’ Interface .....................................................................7

1.5.2 UART .......................................................................................8

1.5.3 Software Description.............................................................10

1.6 Application Notes ..............................................................................21

1.6.1 Line Interface.........................................................................21

1.6.2 Ring Detector Interface .........................................................23

1.6.3 Software Protocol for Transmitting PSK Data Bytes...........24

1.6.4 Software Protocol for Receiving PSK Data Bytes ...............25

1.6.5 Handling Underflow and Overflow Conditions....................25

1.7 Performance Specification ................................................................27

1.7.1 Electrical Performance..........................................................27

1.7.2 Packaging ..............................................................................32

© 2000 Consumer Microcircuits Limited

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D/644A/6

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