Murata Electronics North America DNT24 Manual Do Utilizador
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DNT24 Integration Guide – 03/04/15
2.
A low impedance voltage source applied to the DNT24’s ADC_EXT_REF input pin, 2.7 V maxi-
mum. If no connection is made to this pin, a voltage equal to about 2.7 V will be present.
mum. If no connection is made to this pin, a voltage equal to about 2.7 V will be present.
See Section 5.4 for recommendations on configuring the analog I/O, and Sections 7.4.6 and 7.4.7 for
detailed information on analog I/O parameters.
detailed information on analog I/O parameters.
3.5 I/O Event Reporting and I/O Binding
The DNT24’s I/O event reporting function can generate a protocol-formatted RxEvent message when
triggered by one of the following I/O events:
triggered by one of the following I/O events:
- A specific state change of GPIO0, GPIO1, GPIO2 or GPIO3.
- Firing of the periodic event report timer.
- A high or low threshold exceeded on a measurement by ADC0, ADC1 or ADC2.
- A high or low threshold exceeded on a measurement by ADC0, ADC1 or ADC2.
An I/O report message includes:
- The states of GPIO0 through GPIO5.
- The latest measurements made by ADC0 through ADC2 .
- A set of flags indicating which event(s) triggered the I/O report.
- The settings of DAC0 and DAC1.
- The latest measurements made by ADC0 through ADC2 .
- A set of flags indicating which event(s) triggered the I/O report.
- The settings of DAC0 and DAC1.
The I/O binding function works in conjunction with I/O event reporting. When I/O binding is enabled on a
DNT24, data received in an I/O event report it is mapped as follows:
DNT24, data received in an I/O event report it is mapped as follows:
- GPIO2 will output the state of GPIO0 in the last received event report.
- GPIO3 will output the state of GPIO1 in the last received event report.
- DAC0 will output the voltage read by ADC0 in the last received event report.
- DAC1 will output the voltage read by ADC1 in the last received event report.
- GPIO3 will output the state of GPIO1 in the last received event report.
- DAC0 will output the voltage read by ADC0 in the last received event report.
- DAC1 will output the voltage read by ADC1 in the last received event report.
I/O binding is used to transmit switch positions or analog signals from one location to another. Note that
I/O binding cannot be used in a DNT24 when SPI slave mode is enabled or differential ADC mode is used.
See Section 5.4 for recommendations on configuring I/O event reporting and binding, and Sections 7.4.6
and 7.4.7 for detailed information on I/O reporting and binding parameters.
I/O binding cannot be used in a DNT24 when SPI slave mode is enabled or differential ADC mode is used.
See Section 5.4 for recommendations on configuring I/O event reporting and binding, and Sections 7.4.6
and 7.4.7 for detailed information on I/O reporting and binding parameters.
4.0 DNT24 System Configuration
DNT24 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.
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 DNT24 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
adjusted during system operation such as link status. Write-only parameters include security keys and
certain 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
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
adjusted during system operation such as link status. Write-only parameters include security keys and
certain 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