Murata Electronics North America DNT900 Manual Do Utilizador
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©2008 by RF Monolithics, Inc.
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DNT900 - 11/05/08
Table of Contents
1.0
Introduction ........................................................................................................................................... 5
1.1
Why Spread Spectrum?.................................................................................................................................... 5
1.2
Frequency Hopping versus Direct Sequence..........................................................................................6
2.0 DNT900 Radio Operation ......................................................................................................... 7
2.1
2.1
Network Synchronization and Registration ........................................................................................ 7
2.2
Transparent and Protocol Serial Port Modes..........................................................................................8
2.3
RF Data Communications ........................................................................................................................ 8
2.4
RF Transmission Error Control ......................................................................................................... 9
2.5
Network Configurations .................................................................................................................... 9
2.5.1
Point-to-Point Network Operation .................................................................................................. 9
2.5.2
Point-to-Multipoint Network Operation ....................................................................................... 10
2.6
Full-Duplex Serial Data Communications ...................................................................................... 10
2.7
Channel Access ................................................................................................................................ 10
2.7.1
CSMA Modes..................................................................................................................... 11
2.7.2
TDMA Modes ...........................................................................................................................12
2.8
Network Configuration Planning ..................................................................................................... 13
2.9
Serial Port Operation ...................................................................................................................... 15
2.10
Sleep Modes...................................................................................................................................... 16
2.11
Encryption................................................................................................................................................ 18
3.0 DNT900 Hardware............................................................................................................. 19
3.1
Specifications ............................................................................................................................................20
3.2
Module Interface .......................................................................................................................................21
3.3
Input Voltages ...........................................................................................................................................22
3.4
ESD and Transient Protection .................................................................................................................22
3.5
Interfacing to 5 V Logic Systems .............................................................................................................23
3.6
Power-On Reset Requirements ..............................................................................................................23
3.7
Mounting and Enclosures ...............................................................................................................................23
3.8
Connecting Antennas......................................................................................................................................23
3.9
Labeling and Notices .......................................................................................................................................24
4.0 Protocol Messages........................................................................................................................25
4.1
4.1
Protocol Message Formats.............................................................................................................................25
4.1.1
Message Types ....................................................................................................................................25
4.1.2
Message Format Details .............................................................................................................. 26
4.1.2
Escape Sequence ..................................................................................................................................27
4.1.3
CFG Select Pin .......................................................................................................................................27
4.1.4
Flow Control .................................................................................................................................... 27
4.1.5
Protocol Mode Data Message Example .............................................................................................28
4.2
Configuration Registers ............................................................................................................................28
4.2.1
Bank 0 - Transceiver Setup..................................................................................................................28
4.2.2
Bank 1 - System Settings............................................................................................................. 30
4.2.3
Bank 2 - Status Registers ............................................................................................................ 31
4.2.4
Bank 3 - Serial.......................................................................................................................................33
4.2.5
Bank 4 - Host Protocol Settings ................................................................................................. 34
4.2.6
Bank 5 - I/O Peripheral Registers ........................................................................................................35
4.2.7
Bank 6 - I/O Setup........................................................................................................................................36
4.2.8
Bank FF - Special Functions ................................................................................................................38
4.2.9
Protocol Mode Configuration/Sensor Message Example.................................................................38
4.2.10
Protocol Mode Event Message Example............................................................................................39