GMSK Packet Data Modem
CMX909B
CONTENTS
Section
Page
1.0
1.1
1.2
1.3
1.4
1.5
Features......................................................................................................1
Brief Description .......................................................................................1
Block Diagram ...........................................................................................3
Signal List...................................................................................................4
External Components...............................................................................6
General Description..................................................................................7
1.5.1 Description of Blocks..................................................................7
1.5.2 Modem - µC Interaction.............................................................10
1.5.3 Data Formats ..............................................................................12
1.5.4 The Programmer's View............................................................14
1.5.5 CRC, FEC, Interleaving and Scrambling Details....................32
1.6
1.7
Application Notes....................................................................................35
1.6.1 Transmit Frame Example..........................................................35
1.6.2 Receive Frame Example............................................................37
1.6.3 Clock Extraction & Level Measurement Systems.................39
1.6.4 AC Coupling................................................................................40
1.6.5 Radio Performance....................................................................42
Performance Specification.....................................................................43
1.7.1 Electrical Performance..............................................................43
1.7.2 Packaging....................................................................................48
ã 2001 Consumer Microcircuits Limited
2
D/909B/1
CMLMICRO [ CML MICROCIRCUITS ]
