- 2.4 GHz Frequency Hopping Spread Spectrum Transceivers
- Direct Peer-to-peer Low Latency Communication
- Transmitter RF Power Configurable - 10 or 63 mW
- Built-in Chip Antenna
- 250 kbps RF Data Rate
- Serial Port Data Rate up to 250 kbps, SPI Port Data Rate up to 500 kbps
- 128-Bit AES Encryption
- Separate Serial Port for Diagnostics
- Analog and Digital I/O for Sensor Applications
- FCC, Canadian IC and ETSI Certified for Unlicensed Operation
The DNT24MCA and DNT24MPA FHSS transceiver modules provide a low-cost, versa-
tile solution for wireless data communications in the 2.4 GHz ISM band. Direct peer-to-
peer communication provides very low transmission latency between all modules in a
network. The DNT24MCA/MPA RF output power can be set at 10 or 63 mW. The
DNT24MCA/MPA modules include analog, digital and serial I/O, providing the flexibility
to serve applications ranging from cable replacements to sensor networks. The built-in
chip antenna makes these modules very easy to integrate.
DNT24MCA
DNT24MPA
Low Cost
2.4 GHz FHSS
Transceiver
Modules with
I/O
DNT24MCA/MPA Absolute Maximum Ratings
Rating
Power Supply Input
All Input/Output Pins
Input Power to RFIO Port
Value
-0.5 to +6.5
-0.5 to +3.3
0
Units
V
V
dBm
DNT24MCA/MPA Electrical Characteristics
Characteristic
RF Communication Topology
Spread Spectrum Mode
Operating Frequency Range
Number of RF Channels
Number of Hopping Patterns
Hop Duration
Modulation
RF Data Transmission Rate
Packet Transmission Time Including FHSS
Synchronization and Acknowledgement
Receiver Sensitivity @ 10
-5
BER
Transmitter RF Output Power
Antenna
1
1
8
FSK
250
16
-100
10 or 63 mW
Dielectric Chip Antenna
kbps
ms
dBm
mW
Ω
1
2406
15
64
100
ms
Sym
Notes
Minimum
Typical
Direct Peer-to-Peer
Frequency Hopping
2475
MHz
Maximum
Units
Copyright © Murata Manufacturing Co.,
N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
DNT24MCA/MPA(R) 04/16/15
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DNT24MCA/MPA Electrical Characteristics
Characteristic
ADC Input Range
ADC Input Resolution
ADC Sample Rate
Signal Source Impedance for ADC Reading
ADC External Reference Voltage Range
DAC Output Range
DAC Output Resolution
Primary and Diagnostic Serial Port Baud Rates
Master Serial Peripheral Interface Data Rate
Slave Serial Peripheral Interface Data Rate
Digital I/O:
Logic Low Input Level
Logic High Input Level
Logic Input Internal Pull-up Resistor
Power Supply Voltage Range
Power Supply Voltage Ripple
Peak Transmit Mode Current, 63 mW Output
Operating Receive Current
Sleep Current
DNT24MCA Mounting
DNT24MPA Mounting
Operating Temperature Range
Operating Relative Humidity Range, Non-condensing
-40
10
2
40
3
Reflow Soldering
Socket
85
90
o
Sym
Notes
Minimum
0
Typical
Maximum
2.7
12
Units
V
bits
Hz
100
10
1.0
0
2.7
3.3
12
1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8,
38.4, 57.6, 115.2, 230.4, 250.0
KΩ
V
V
bits
kbps
kbps
kbps
125
250
500
4000
-0.5
2.45
20
V
CC
+3.3
0.8
3.3
V
V
KΩ
+5.5
10
140
Vdc
mV
P-P
mA
mA
6
µA
C
%
Notes:
1. The DNT24MCA/MPA achieves regulatory certification under FHSS rules.
2. Maximum sleep current occurs at +85
o
C.
CAUTION: Electrostatic Sensitive Device. Observe precautions when handling.
Copyright © Murata Manufacturing Co.,
N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
DNT24MCA/MPA(R) 04/16/15
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N T 2 4 M C A / N T 2 4 M P A B lo c k
G N
A C T (
/
C
G P IO 0
R A
R A
IO _ T X
(
IA G _ T X )
IA G _ R X )
ia g r a m
1
2
3
4
5
6
IR Q 0
IR Q 1 /
C L K
C h ip
A n te n n a
IO _ R X
A T A
P L L _ L O C K
G P IO 4 (/H O S T _ C T S )
G P IO 5 (/H O S T _ R T S )
P W R
8
9
1 0
1 1
M ic r o c o n tr o lle r
S
S C K
S
O
A T A
I
A C 0
G P IO 2
G P IO 1
G P IO 3 (
A C 1
V C C
G N
A V )
2 .4 G H z
T r a n s c e iv e r
T /R
T /R
F ilte r
R F IO
n S S _
P R E
1 2
1 3
1 4
1 5
n S S _ C O N F IG
+ 3 .3 V
R e g
1 6
G N
1
/R E S E T
1 8
A
C 0
1 9
A
C 1
2 0
M IS O
2 1
M O S I
2 2
/S S
2 3
S C L K
2 4
3 .3 V _ O U T
2 5
A
C _ E X T _ R E F
2 6
R S V
2
R S V
2 8
G N
2 9
R S V
3 0
G N
Figure 1
DNT24MCA/MPA Hardware
The major components of the DNT24MCA/MPA in-
clude a 2.4 GHz FHSS transceiver and a low current
8-bit microcontroller. The DNT24MCA/MPA hops
across 15 frequency channels in the 2.4 GHz ISM
band on one of 64 selectable hopping patterns. The
DNT24MCA/MPA has two selectable RF output power
levels: 10 mW and 63 mW. The built-in chip antenna
makes these modules very easy to integrate.
The DNT24MCA/MPA provides a variety of hardware
interfaces. There are two serial ports plus one SPI
port. Either the primary serial port or the SPI port can
be selected for data communications. The second se-
rial port is dedicated to diagnostics. The primary and
diagnostic serial ports support most standard baud
rates up to 250.0 kbps. The SPI port supports data
rates up to 500 kbps. The DNT24MCA/MPA also in-
cludes three ADC inputs, two DAC outputs, and six
general-purpose digital I/O ports. Four of the digital I/O
ports support an optional interrupt-from-sleep mode
when configured as inputs. The radio is available in
two mounting configurations. The DNT24MCA is de-
signed for solder reflow mounting. The DNT24MPA is
designed for plug-in connector mounting.
DNT24MCA/MPA Firmware
DNT24MCA/MPA firmware implements
direct peer-
to-peer
data transmissions that provide very low trans-
mission latency between all DNT24MCA/MPA radios
in a network. In addition, efficient point-to-point and
point-to-multipoint networks are readily configured
using direct peer-to-peer transmissions.
DNT24MCA/MPA firmware provides the user with a
rich set of configuration options including a choice of
hopping patterns, serial and/or SPI data port opera-
tion, serial and SPI data rate selection, RF output
power selection, plus configurable analog and digital
I/O lines.
Data integrity is protected by 24-bit error detection,
with optional ACK and automatic transmission retries
or redundant transmissions. 128-bit AES encryption
provides a high level of data security for sensitive
applications. Sensor networks can take advantage of
timer or event-based data reporting and remote node
sleep cycling for extended battery life.
Copyright © Murata Manufacturing Co.,
N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
DNT24MCA/MPA(R) 04/16/15
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DNT24MCA/MPA I/O Descriptions
Pin
1
2
Name
GND
ACT
(DIAG_TX)
/DCD
(DIAG_RX)
I/O
-
O
(O)
O
(I)
Description
Power supply and signal ground. Connect to the host circuit board ground.
This pin’s default configuration is transmitter activity (ACT) output. The ACT signal is asserted whenever
any data packet other than just an ACK is transmitted. The alternate function for this pin is the diagnostic
serial port output.
The /DCD signal is asserted when a DNT24MA receives a valid packet. If a radio is transmitting data and
receiving ACKs, both the ACT and /DCD signals will be asserted. If a radio is receiving packets only, the
/DCD signal will be asserted. The alternate function for this pin is the diagnostic serial port input.
Configurable digital I/O port 0. When configured as an input, an internal pull-up resistor can be selected
and direct interrupt from sleep can be invoked. When configured as an output, the power-on state is
configurable. In sleep mode the pin direction, input pull-up selection or output state are also separately
configurable.
Serial data output from the radio.
Serial data input to the radio.
Default pin function is GPIO4 with the same configuration options as GPIO0. Alternate pin function is
UART/SPI flow control output. The module sets this line low when it is ready to accept data from the host
on the RADIO_RXD or MOSI input. When the line goes high, the host must stop sending data.
Default pin function is GPIO5 with the same configuration options as GPIO0. Alternate pin function is
UART/SPI flow control input. The host sets this line low to allow data to flow from the module on
the RADIO_TXD pin. When the host sets this line high, the module will stop sending data to the host.
12-bit DAC 0 output. Full scale output can be referenced to the voltage at pin 25 or the 3.3 V regulated
module bus voltage.
Configurable digital I/O port 2. Same configuration options as GPIO0.
Configurable digital I/O port 1. Same configuration options as GPIO0.
Default pin function is GPIO3 with the same configuration
options as GPIO0. When SPI slave mode oper-
ation is enabled, a logic high on this pin indicates when data is available to be clocked out by the SPI
master.
12-bit DAC 1 output. Same specifications and configuration options as DAC0.
Power supply input, +3.3 to +5.5 Vdc.
Power supply and signal ground. Connect to the host circuit board ground.
Power supply and signal ground. Connect to the host circuit board ground.
Active low module hardware reset.
ADC input 0. This pin is a direct ADC input when the ADC is operating in single-ended mode, or the differ-
ential negative input for positive inputs applied to ADC1 or ADC2 when the ADC is operating in differential
mode. Full-scale reading can be referenced to Pin 25 for ratiometric measurements. For absolute mea-
surements, the ADC can use either the regulated supply voltage divided by 1.6 (about 2.06 V), or an ex-
ternal voltage applied to Pin 25. In single-ended mode, ADC measurements are 11-bit unsigned values
with full scale nominally 2.7 V when referenced to a 2.7 V input on Pin 27. In differential mode, ADC mea-
surements are 12-bit signed values.
ADC input 1. Direct input when the ADC is operating in single-ended mode, positive differential input rela-
tive to ADC0 when the ADC is operating in differential mode.
This pin is the SPI master mode input or slave mode output.
This pin is the SPI master mode output or slave mode input.
SPI active low slave select. This pin is an output when the module is operating as a master, and an input
when it is operating as a slave.
SPI clock signal. This pin is an output when operating as a master, and an input when operating as
a slave.
3
4
GPIO0
I/O
5
6
7
RADIO_TXD
RADIO_RXD
GPOI4
(/HOST_CTS)
GPOI5
(/HOST_RTS)
DAC0
GPIO2
GPIO1
GPIO3
(DAV)
DAC1
VCC
GND
GND
/RESET
O
I
I/O
(O)
I/O
(I)
O
I/O
I/O
I/O
(O)
O
I
-
-
I
8
9
10
11
12
13
14
15
16
17
18
ADC0
I
19
20
21
22
23
ADC1
MISO
MOSI
/SS
SCLK
I
I/O
I/O
I/O
I/O
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N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
DNT24MCA/MPA(R) 04/16/15
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Pin
24
Name
ADC2
I/O
I
Description
ADC input 2. Direct input when the ADC is operating in single-ended mode, positive differential input rela-
tive to ADC0 when the ADC is operating in differential mode.
ADC external reference voltage pin. The voltage at this pin can be used by the ADCs as a reference for
ratiometric measurements. With no external voltage or load applied, this pin presents a nominal 2.7 V out-
put through a 2.126 K source resistance. A low impedance external reference voltage in the range of 1 to
2.7 V may be applied to this pin as an option.
Reserved pin. Leave unconnected.
Reserved pin. Leave unconnected.
Connect to the host circuit board ground plane.
Reserved pin. Leave unconnected.
Connect to the host circuit board ground plane.
25
ADC_EXT_
REF
RSVD
RSVD
GND
RSVD
GND
I/O
26
27
28
29
30
-
-
-
-
-
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N.A.,
All Rights Reserved 2010
©2010-2015 by Murata Electronics
Ltd.
Inc.
DNT24MCA/MPA(R) 04/16/15
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