CMX910 datasheet(2/61 Pages) CMLMICRO

2 / 61 page

AIS Baseband Processor

CMX910

D/910/6

CONTENTS

Section

Page

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

Block Diagram .....................................................................................................4

Signal List ............................................................................................................5

External Components .........................................................................................7

General Description ............................................................................................8

5.1

Overview of CMX910 Operation............................................................8

5.2

C-BUS Interface......................................................................................9

5.3

Reset and Power Control ....................................................................12

5.3.1

RESETN pin .............................................................................12

5.3.2

General Reset Command .......................................................12

5.3.3

Clock Control...........................................................................12

5.4

Slot and Sample Timer ........................................................................13

5.4.1

Manual Nudge..........................................................................16

5.4.2

Auto Nudge..............................................................................17

5.4.3

Sleep Mode ..............................................................................17

5.4.4

Selecting the Nudge_Trigger Value ......................................18

5.5

Transmit Operation ..............................................................................19

5.5.1

Transmitter Registers.............................................................19

5.5.2

AIS Raw Mode Transmit .........................................................24

5.5.3

AIS Burst Mode Transmit .......................................................25

5.5.4

DSC Transmit ..........................................................................27

5.5.5

Transmitter Timing Control....................................................29

5.6

Receive Operation................................................................................32

5.6.1

Receiver Registers..................................................................33

5.6.2

AIS Raw Mode Receive...........................................................37

5.6.3

AIS Burst Mode Receive.........................................................38

5.6.4

DSC Receive (Main Channel) .................................................39

5.6.5

DSC Receive (External FSK Interface)..................................39

5.7

Auxiliary A-to-D Converter ..................................................................40

5.8

Auxiliary D-to-A Converters ................................................................42

5.9

Interrupt Generator ..............................................................................46

5.10

Device Enable Port...............................................................................48

5.11

C-BUS Expansion Port ........................................................................49

5.12

Special Command Interface................................................................50

Supplementary Information .............................................................................52

6.1

Glossary of Terms................................................................................52

Performance Specification...............................................................................54

7.1

Electrical Performance ........................................................................54

7.1.1

Absolute Maximum Ratings...................................................54

7.1.2

Operating Limits......................................................................54

7.1.3

Operating Characteristics ......................................................55

7.2

Packaging .............................................................................................60

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