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DNT90 Integration Guide - 05/10/12
4.0 DNT90 System Configuration
DNT90 radios feature an extensive set of configuration options that allows them to be adapted to a wide
range of applications. Configuration defaults have been carefully selected to minimize the configuration
effort for most applications, while providing the ability to individually adjust the configuration of each radio
to achieve highly optimized system operation.
4.1 Configuration Parameters
The configuration of a DNT90 is controlled by a set of
parameters
(registers). Parameters that address a
particular aspect of operation are grouped into a
bank
. All parameters can be accessed through a mod-
ule’s serial port and over the radio link. Most parameters are read/write. Read-only parameters include
fixed values such a MAC addresses, firmware version numbers and parameters that are dynamically ad-
justed during system operation such as link status. Write-only parameters include security keys and cer-
tain action triggers such as reset. Incorrectly configuring certain parameters can disable a module’s radio
link, but the configuration can always be corrected through the serial port. The organization of the param-
eter register banks and the details of each parameter are covered in Section 7.4 of this guide. Sections
4.2 through 5.7 discuss which parameters apply to various aspects of configuring a DNT90 system, net-
work or application interface.
4.2 Configuring a Basic Point-to-Point System
A basic DNT90 point-to-point system is suitable for many serial data applications. The default config-
uration of a DNT90 is a remote with the serial port configured for transparent operation at 9.6 kbps,
8N1. To configure a basic point-to-point system:
1. Configure one of the modules as a base by setting the
DeviceMode
parameter in Bank 0 to 0x01.
2. Set
the
MemorySave
parameter in Bank 0xFF to 0xD2, which will save the
DeviceMode
parame-
ter to EEPROM and reset the module, enabling base operation.
3. All other parameters may be left at their default values.
4.3 Configuring a Basic Point-to-Multipoint Point System
A basic DNT90 point-to-multipoint point systems is suitable for many serial data applications where
multiple remotes are used. The default configuration of a DNT90 is a remote with the serial port con-
figured for transparent operation at 9.6 kbps, 8N1. To configure a basic point-to-multipoint system:
1. Configure one of the modules as a base by setting the
DeviceMode
parameter in Bank 0 to 0x01.
2. If the host application driving the base will individually communicate each remote, set the
Proto-
colMode
parameter in Bank 4 of the base to 0x01. This step is not required if messages from the
base to the remotes will always be broadcast and/or the base does not need to know the MAC
address of the remote sending a message.
3. Set
the
MemorySave
parameter in Bank 0xFF to 0xD2, which will save the
DeviceMode
parame-
ter to EEPROM and reset the module, enabling base operation.
4. All other parameters may be left at their default values.
