RFM DNT2400 Series, Integration Manual

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©2009 by RF Monolithics, Inc. E-mail: tech_sup@rfm.com DNT2400 - 08/18/09
Table of Contents
1.0 Introduction ......................................................................................................................................... 5
1.1
Why Spread Spectrum?................................................................................................................... 5
1.2 Frequency Hopping versus Direct Sequence .................................................................................. 6
2.0 DNT2400 Radio Operation ................................................................................................................. 7
2.1 Network Synchronization and Registration...................................................................................... 7
2.2
Authentication .................................................................................................................................. 8
2.3 Transparent and Protocol Serial Port Modes .................................................................................. 9
2.4
RF Data Communications................................................................................................................ 9
2.5 RF Transmission Error Control ........................................................................................................ 9
2.6
Transmitter Power Management ................................................................................................... 10
2.7 Network Configurations ................................................................................................................. 10
2.7.1 Point-to-Point Network Operation............................................................................................... 10
2.7.2 Point-to-Multipoint Network Operation ....................................................................................... 11
2.7.3 Peer-to-Peer Network Operation ................................................................................................ 11
2.8 Full-Duplex Serial Data Communications ...................................................................................... 11
2.9
Channel Access ............................................................................................................................. 12
2.9.1 Polling Mode ............................................................................................................................... 12
2.9.2 CSMA Mode ............................................................................................................................... 13
2.9.3 TDMA Modes.............................................................................................................................. 14
2.10 Transmission Configuration Planning ............................................................................................ 14
2.10.1 TDMA
Throughput ...................................................................................................................... 15
2.10.2 Polling Throughput ..................................................................................................................... 15
2.10.3 CSMA Throughput ...................................................................................................................... 16
2.10.4 Latency ....................................................................................................................................... 16
2.10.5 Configuration
Validation ............................................................................................................. 17
2.11 Serial Port Operation .................................................................................................................. 19
2.12 Sleep Modes .................................................................................................................................. 20
2.13 Encryption ...................................................................................................................................... 22
2.14 Synchronizing Co-located Bases................................................................................................... 22
3.0 DNT2400 Hardware .......................................................................................................................... 24
3.1
Specifications................................................................................................................................. 25
3.2 Module Interface ............................................................................................................................ 26
3.3 DNT2400C RFIO Stripline ............................................................................................................. 27
3.4 DNT2400 Antenna Connector ....................................................................................................... 28
3.5 Input Voltages ................................................................................................................................ 28
3.6 ESD and Transient Protection ....................................................................................................... 28
3.7 Interfacing to 5 V Logic Systems ................................................................................................... 29
3.8
Power-On Reset Requirements..................................................................................................... 29
3.9 Mounting and Enclosures .............................................................................................................. 29
3.10 Labeling and Notices ..................................................................................................................... 29
4.0 Protocol Messages............................................................................................................................ 31
4.1
Protocol Message Formats............................................................................................................ 31
4.1.1 Message Types .......................................................................................................................... 31
4.1.2 Message Format Details............................................................................................................. 32
4.1.3 /CFG Select Pin .......................................................................................................................... 33
4.1.4 Flow Control ............................................................................................................................... 33
4.1.5 Protocol Mode Data Message Example ..................................................................................... 34