CTCSS Signalling Processor

FX818

© 1997 Consumer Microcircuits Limited

2

D/818/4

CONTENTS

Section

Page

1.0 Features .......................................................................................................... 1

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

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

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

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

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

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

1.5.1 Software Description ..................................................................... 7

1.6 Application Notes......................................................................................... 18

1.6.1 General .......................................................................................... 18

1.6.2 Transmitter ................................................................................... 18

1.6.3 Receiver (Decode) ........................................................................ 18

1.6.4 Receiver (Fast Detect) ................................................................. 19

1.6.5 General Purpose Timer................................................................ 19

1.6.6 Tx / Fast Rx Tone Table ............................................................... 19

1.6.7 Rx Program Tone Table............................................................... 20

1.7 Performance Specification .......................................................................... 21

1.7.1 Electrical Performance ................................................................ 21

1.7.2 Packaging ..................................................................................... 26

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.