FX919B datasheet(2/47 Pages) CMLMICRO

2 / 47 page

4-Level FSK Modem Data Pump

FX919B

D/919B/1

CONTENTS

Section

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 Description of Blocks .................................................................... 7

1.5.2 Modem - µC Interaction ............................................................... 10

1.5.3 Binary to Symbol Translation ..................................................... 11

1.5.4 Frame Structure ........................................................................... 12

1.5.5 The Programmer's View .............................................................. 13

1.5.5.1 Data Block Buffer ........................................................................ 13

1.5.5.2 Command Register ..................................................................... 14

1.5.5.3 Control Register .......................................................................... 22

1.5.5.4 Mode Register ............................................................................. 24

1.5.5.5 Status Register............................................................................ 26

1.5.5.6 Data Quality Register .................................................................. 27

1.5.6 CRC, FEC, and Interleaving......................................................... 28

1.5.7 Transmitted Symbol Shape......................................................... 29

1.6 Application Notes......................................................................................... 30

1.6.1 Transmit Frame Examples .......................................................... 30

1.6.2 Receive Frame Examples ............................................................ 33

1.6.3 Clock Extraction & Level Measurement Systems ..................... 36

1.6.4 AC Coupling ................................................................................. 37

1.6.5 Radio Performance ...................................................................... 39

1.6.6 Received Signal Quality Monitor ................................................ 40

1.7 Performance Specification .......................................................................... 41

1.7.1 Electrical Performance ................................................................ 41

1.7.2 Packaging ..................................................................................... 45

Note:

As this product is still in development, it is likely that a number of changes and additions will be

made to this specification. Items marked TBD or left blank will be included in later issues.

FX919B Datasheet(PDF) 2 Page - CML Microcircuits