1
ZMN2400
Rating Value Units
All Input/Output Pins -0.3 to +6.0 V
Non-Operating Ambient Temperature Range -40 to +85 oC
ZMN2400 Absolute Maximum Ratings
ZMN2400 Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Operating Frequency Range 2405 2480 MHz
Operating Frequency Tolerance -300 300 kHz
Spread Spectrum Method Direct Sequence
Modulation Type O-QPSK
Number of RF Channels 16
RF Data Transmission Rate 250 kb/s
Symbol Rate Tolerance 120 ppm
RF Channel Spacing 5 MHz
Receiver Sensitivity, 10-5 BER -92 dBm
Upper Adjacent Channel Rejection, +5 MHz 46 dB
Lower Adjacent Channel Rejection, -5 MHz 39 dB
Upper Alternate Channel Rejection, +10 MHz 58 dB
Lower Alternate Channel Rejection, -10 MHz 55 dB
Maximum RF Transmit Power -3 0 dBm
Transmit Power Adjustment -25 dB
Optimum Antenna Impedance 50 Ω
•2.4 GHz ZigBee Transceiver Module
•Supports Multiple Network Topologies
•Small Size, Light Weight, Low DC Power Requirements
•FCC and ETSI Certified for Unlicensed Operation ZigBee
Transceiver
Module
The ZMN2400 2.4 GHz transceiver module is a low cost, low-power solution for
point-to-point, point-to-multipoint and MESH wireless systems. The ZMN2400 mod-
ule provides the flexibility and versatility to serve applications ranging from cable re-
placements to sensor networks. Based on the IEEE 802.15.4 wireless standard and
the ZigBee protocol stack, the ZMN2400 module is easy to integrate and provides
robust wireless communications including MESH network operation. The ZMN2400
also includes Cirronet’s powerful CSM application profile, which eliminates the need
for customer firmware programming.
Shown with Shield Removed
2
Characteristic Sym Notes Minimum Typical Maximum Units
ADC Input Range 0 2.5 V
ADC Input Resolution 10 bits
ADC Input Impedance 55 MΩ
PWM Output Resolution 12 bits
UART Baud Rate 1.2 115.2 kb/s
Digital I/O:
Logic Low Input Level -0.5 0.64 V
Logic High Input Level 1.98 3.7 V
Logic Input Internal Pull-up Resistor 20 KΩ
Logic Low Output Level, ISINK =10mA 0.5 V
Logic High Output Level 2.4 V
Logic Low Output Sink Current ISINK 20 mA
Logic High Output Source Current ISOURCE 5mA
Power Supply Voltage Range VCC +3.3 +5.5 Vdc
Power Supply Voltage Ripple 10 mVP-P
Receive Mode Current 25 mA
Transmit Mode Current 30 mA
Sleep Mode Current 25 µA
Operating Temperature Range -40 85 oC
ZMN2400 Electrical Characteristics
CAUTION: Electrostatic Sensitive Device. Observe precautions when handling.
3
ZMN2400 Hardware
The major hardware components of the ZMN2400 in-
clude a CC2420 IEEE 802.15.4 compatible transceiver
and an ATmega128 microcontroller. The ZMN2400
operates in the frequency band of 2405 to 2460 MHz
at a nominal output power of 1 mW.
The CC2420 transceiver receives a 16 MHz reference
clock through an IC switch controlled by the ATmega
microcontroller, which allows the transceiver to be
idled during sleep periods. SPI signals provide the
main interface between the transceiver and micro-
controller. The SPI signals are supplemented by FIFO
and FIFOP transceiver buffer status signals, the CCA
clear channel assessment signal, and the SFD start of
frame delimiter signal.
In addition to controlling the CC2420, the ATmega128
provides a variety of application hardware interfaces
including an SPI interface, UART interface, three
10-bit ADC inputs, two PWM (DAC) outputs, and six
general purpose digital I/O ports.
ZMN2400 Firmware
The main firmware components in the ZMN2400 in-
clude the ZigBee protocol stack and the Cirronet Stan-
dard Module (CSM) application profile. The ZigBee
protocol stack implements networking and security,
with underlying support from the 802.15.4 Media Ac-
cess Control (MAC) layer. The standard ZMN2400
firmware implements a ZigBee full function device
(FFD). This allows the module to operate as either a
coordinator or router. Optional ZMN2400 firmware is
available that implements a ZigBee reduced function
device (RFD). This allows the module to operate as an
end device. The CSM profile provides an application
programming interface (API) for all the ZMN2400 ap-
plication hardware interfaces. The CSM profile in-
cludes Network Discovery, Send/Receive Serial Data,
Read/Write SPI Port, Read ADC Inputs, Write DAC
Outputs, Read/Write GPIO and Module Configuration
services. In addition, the CSM profile provides two
sleep modes - timer sleep and interrupt sleep. See the
ZMN2400HP ZigBee Module Developer’s Kit User’s
Manual for details of the CSM profile API.
23 24 25 26 27 2822212019 29 30 31
18
17
16
15
14
13
12
11
10
9
8
7
6
5
ZM N 2400 B lock D iagram
Filter
Filter
Filter
32 33 34 36
A Tm ega128
M icrocontroller
4
3
2
1R eg
Filter
Filter
VCC
GND
PW M A
PW M B
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GND
LINK/TDO
/T R S T
ACT/TCK
STAT1/TM S
STAT0/TDI
GND
GND
35
CC2420
802.15.4
R adio
SCLK
MOSI
MISO
FIFO
FIFO P
CCA
SFD
CSn
RFIO
16 M H z32.768 kH z
GND
GND
UART_RX
UART_TX
RESET
ADCX
ADCY
ADCZ
GND
SPI_EN
SPI_SCLK
SPI_M O SI
SPI_M ISO
GND
GND
GND
Switch
NC
+ 3 .3 V
+ 3 .3 V
+ 3 .3 V
Figure 1
Pad Name Description
1 VCC Power supply input, +3.3 to +5.5 Vdc.
2 GND Power supply and signal ground. Connect to the host circuit board ground.
3 PWMA Pulse-width modulated output A. Provides a DAC function when used with an external low-pass filter.
4 PWMB Pulse-width modulated output B. Provides a DAC function when used with an external low-pass filter.
5 GPIO0 Configurable digital I/O port 0. When configured as an output, the power-on state is also configurable.
6 GPIO1 Configurable digital I/O port 1. When configured as an output, the power-on state is also configurable.
7 GPIO2 Configurable digital I/O port 2. When configured as an output, the power-on state is also configurable.
8 GPIO3 Configurable digital I/O port 3. When configured as an output, the power-on state is also configurable.
9 GPIO4 Configurable digital I/O port 4. When configured as an output, the power-on state is also configurable.
10 GPIO5 Configurable digital I/O port 5. When configured as an output, the power-on state is also configurable.
11 GND Power supply and signal ground. Connect to the host circuit board ground.
12 LINK/TDO Output signal indicating module’s link status in default mode. Also used by JTAG interface as Test Data Output.
13 /TRST Used by JTAG interface as active low Reset input. Leave disconnected if JTAG interface will not be used.
14 ACT/TCK Output signal indicating RF data activity. Also used by JTAG interface as Data Clock Input.
15 STAT1/TMS Output signal defined by firmware version. Also used to select JTAG mode.
16 STAT0/TDI Output signal defined by firmware version. Also used by JTAG interface as Test Data Input.
17 - 20 GND Power supply and signal grounds. Connect to the host circuit board ground.
21 UART_RX Serial data input to UART.
22 UART_TX Serial data output from UART.
23 NC No connection.
24 /RESET Active low module hardware reset input. This input must be held low when the power supply input is in the
range of +1.5 to +2.7 Vdc.
25 ADCX 10-bit ADC input X. Input voltage range is 0 to +2.5 Vdc.
26 ADCY 10-bit ADC input Y. Input voltage range is 0 to +2.5 Vdc.
27 ADCZ 10-bit ADC input Z. Input voltage range is 0 to +2.5 Vdc.
28 GND Power supply and signal ground. Connect to the host circuit board ground.
29 SPI_EN Active-low enable output for SPI bus devices.
30 SPI_SCLK SPI port clock signal.
31 SPI_MOSI SPI port data output.
32 SPI_MISO SPI port data input.
33 GND Power supply and signal ground. Connect to the host circuit board ground.
34 GND RF ground. Connect to the host circuit board ground plane, and to shield when using coaxial cable.
35 RFIO RF port. Connect the antenna to this port with a 50 Ωstripline or semi-rigid coaxial cable.
36 GND RF ground. Connect to the host circuit board ground plane, and to shield when using coaxial cable.
4
ZMN2400 I/O Pad Descriptions - Some I/O Pad Functionality Depends on the Firmware Version Installed.
RFIO Stripline
The RFIO pad on the radio module is connected directly to an antenna on the host circuit board, or to an MMCX
or similar RF connector. It is important that this connection be implemented as a 50 ohm stripline. Referring to
Figure 3, the width of this stripline depends on the thickness of the circuit board between the stripline and the
groundplane. For FR-4 type circuit board materials (dielectric constant of 4.7), the width of the stripline is equal to
1.75 times the thickness of the circuit board. Note that other circuit board traces should be spaced away from the
stripline to prevent signal coupling, as shown in Figure 4. The stipline trace should be kept short to minimize its in-
sertion loss.
5
0.030
Square
0.090
1.200
0.090
0.835
0.790
ZM N2400 O utline and M ounting D im ensions
0.060
1
36
Top View
0.095
18
19
Figure 2
Copper
G round
Plane
Copper
Stripline
Trace
FR-4 PCB
Material
C ircuit B oard Stripline Trace D etail
For 50 ohm im pedance W = 1.75 * H
Figure 3 Figure 4
Trace Separation from
50 Ohm Microstrip
Length of Trace Run
Parallel to Microstrip
100 mil 125 mil
150 mil 200 mil
200 mil 290 mil
250 mil 450 mil
300 mil 650 mil
Reflow Profile
An example solder reflow profile for mounting the radio module on its host circuit board is shown in Figure 5.
6
Cirronet, 3079 Premiere Parkway, Suite 140, Duluth Georgia USA 30097, www.cirronet.com, Phone +1.678.684.2000, FAX+1.678.684.2001
Note: Specifications subject to change without notice.
file: zmn2400_h.vp, 2007.02.16 rev
Figure 5
