Texas Instruments Chipcon Products CC2420 User manual

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User Manual
Rev. 1.0
CC2420 ZigBee DK Development Kit

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Table of contents
INTRODUCTION ....................................................................................................................... 3
CC2420 ZIGBEE DK HARDWARE COMPONENTS ....................................................................... 5
CC2420 ZIGBEE DK SOFTWARE COMPONENTS ........................................................................ 5
OPTIONAL SOFTWARE COMPONENTS ......................................................................................... 8
CC2420DB PCB..................................................................................................................... 9
HARDWARE OVERVIEW........................................................................................................... 10
POWER SUPPLY SECTION ....................................................................................................... 10
RS-232 INTERFACE................................................................................................................ 10
MICROCONTROLLER AND USER INTERFACE.............................................................................. 10
EXTERNAL RAM..................................................................................................................... 12
MEMORY REQUIREMENTS ....................................................................................................... 12
CC2420DB LOW POWER MODE SUPPORT.............................................................................. 13
CC2420DB TEMPERATURE RANGE ........................................................................................ 13
JUMPER SETTINGS FOR CC2420DB CONTROL........................................................................ 13
CC2420DB CURRENT MEASUREMENT AND CONSUMPTION...................................................... 15
USING THE CC2400EB AND CC2420EM FOR ZIGBEE PACKET SNIFFING .................... 16
USING THE CC2420DB DEMONSTRATION BOARD WITH THE Z-STACK....................... 18
IEEE 64- BITS EXTENDED ADDRESS ....................................................................................... 18
CC2420DB Z-STACK DOWNLOAD AND DEBUGGING USING AVR STUDIO 4 .............................. 18
PREPROGRAMMED FUSES....................................................................................................... 20
CC2420DB DEVELOPMENT ENVIRONMENT FOR ZIGBEE APPLICATIONS ................................... 21
JTAG ICE .............................................................................................................................21
TROUBLESHOOTING ............................................................................................................ 25
IT DOES NOT WORK................................................................................................................. 25
REFERENCES ........................................................................................................................ 26
DISCLAIMER ........................................................................................................................... 28
TRADEMARKS......................................................................................................................... 28
LIFE SUPPORT POLICY............................................................................................................ 28

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Introduction
The CC2420 is a single-chip, IEEE 802.15.4 compliant and ZigBee™ ready RF transceiver. It
provides a highly integrated, flexible low-cost solution for applications using the world wide
unlicensed 2.4 GHz frequency band. The CC2420 ZigBee DK Development Kit is a natural
supplement to the already established Chipcon CC2420 kits, i.e. the CC2420DK
Development Kit and the CC2420DBK Demonstration Board Kit. The hardware is
representative of an actual application, and is well suited as a prototyping, evaluation and
demonstration platform targeting various ZigBee applications. With this kit a ZigBee Logical
device type mapped to the IEEE 802.15.4 Full Function and Reduced Function Devices (FFD
and RFD) using the CC2420 can be demonstrated. An FFD can take the role of a ZigBee
Coordinator, Router, or End Device depending on the ZigBee logical device type
configuration. An RFD can act as ZigBee End Device and cannot serve as a ZigBee
Coordinator or ZigBee Router.
The CC2420 ZigBee DK has the capability to demonstrate ZigBee low power capabilities.
The CC2420 ZigBee DK is bundled with the Figure 8 Wireless ZigBee stack for evaluation,
demonstration, prototyping and developing purposes of the Z-Stack features. The hardware
platform is based on the CC2420DB Demonstration Board. The hardware contains an
integrated PCB antenna, the IEEE 802.15.4 compliant RF transceiver CC2420 with
necessary support components, an Atmel Atmega128L AVR microcontroller, 32 kB external
RAM, and, as well as a joystick, buttons and LED’s that can be used to demonstrate the
current ZigBee Home Lightning Profile. Please note that CC2420DB includes this memory
because it can be used for debugging purposes, to buffer and store data if desired. The 32kB
external RAM size is not a requirement nor necessary for a low cost ZigBee logical device.
The CC2420DB is also furnished with connectors where the internal signals on the PCB are
available for further sensor daughter boards addition to easy add additional profile hardware
when desired. The details of the CC2420DB features are described in the CC2420DBK User
Manual. Please refer to the references section of this document.
The CC2420 ZigBee DK provides, in addition to five CC2420DB’s, a CC2400EB that together
with CC2420EM can utilize the capability of running Chipcon’s Packet Sniffer with the new
ZigBee packet parser addition.
This User Manual describes how to use the CC2420 ZigBee DK Development Kit. The
Figure 8 Wireless Z-Stack, tools and documentation will be provided as a distribution
package available for download from the Chipcon ZigBee Developer Site after the purchase
of this kit. When purchased, customers will be provided with a user name and password to
access this site to download the Z-Stack End Customer distribution package. The Chipcon
ZigBee Developer site will be available in the beginning of October.
Please refer to the reference section of this document for links to Atmel’s documentation on
how to use their tools.

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Your CC2420 ZigBee DK Development Kit should contain the following items:
Kit contents
Item Number of articles
Demonstration Board (CC2420DB) 5
Evaluation Board (CC2400EB) 1
Evaluation Module (CC2420EM) 1
CC2420 sample kit 1
Quick Start instructions 1
CC2420DB Important Notice 1
User name and password for Chipcon ZigBee Developer Site 1
Atmel JTAG ICE mkII 1
Power Supplies (global AC-to-DC adapter) 6
Battery clip/adapter 5
RS-232 cable 3
USB cable 1
2.4 GHz Antenna 1
Important:
Contact your local telecommunication authorities before transmitting an RF signal to ensure
that there are no local restrictions on the use of the 2.400 –2483.5 MHz ISM band. The
CC2420 operates in the 2.4 GHz frequency band. Although this frequency band is usually
described as “world-wide”, some countries do not allow unlicensed operation in this band.

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CC2420 ZigBee DK Hardware Components
Table 1 below contains a description of the hardware components included in the CC2420
ZigBee DK Development Kit.
Hardware Component Number of pcs. Description
CC2420DB 5 Each CC2420DB demonstration board
contains a CC2420 with necessary support
components to develop a full functional IEEE
802.15.4 or ZigBee™ device. The boards
contain an Atmel ATMega128L AVR
microcontroller, external RAM, a PCB antenna,
as well as a RS-232 serial port, joystick,
potentiometer, temperature sensor, buttons
and LED’s that can be used to implement a
user interface for applications.
RS-232 Cable 3 RS-232 cable for connection of the CC2420DB
boards to a PC.
CC2400EB 1 CC2420 transceiver motherboard. Connects to
a PC to run the Chipcon Packet Sniffer
software. RF Performance evaluation is also
possible.
CC2420EM 1 CC2420 transceiver daughter board, connects
to the CC2400EB board.
USB Cable 1 For connection of the CC2400EB / CC2420EM
to a PC.
Antenna 1 50Ω quarter-wave monopole, SMA male
connector for use with CC2420EM
Power supply 3 DC Power supply (with global connectors) for
use with the CC2420DB / CC2400EB.
Atmel JTAGICE mkII 1 Atmel JTAG based debug / programming tool.
Connects to PC through USB or serial port.
USB and RS-232 Cables for use with the
JTAG ICE are included.
Battery Clip 5 Use to connect 3 x 1.5 AA batteries to
demonstrate low power capabilities
Table 1: CC2420 ZigBee DK Hardware Components
CC2420 ZigBee DK Software Components
The table below contains a description of the software components included in the CC2420
ZigBee DK. The software components also include software, which has been licensed from
Figure 8 Wireless (www.figure8wireless.com ).

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Software component Description
Chipcon Packet Sniffer IEEE 802.15.4 / ZigBee packet sniffer. Downloadable from the
Chicpon web site. Runs on the CC2400EB / CC2420EM
hardware platform, and connects to a PC through a USB
connector.
Chipcon MAC Layer
Object Code
Object code for Atmel AVR. Included in library form with Z-Stack.
GCC Tool See download instructions in Figure 8 Wireless Z-Stack User’s
Guide for the CC2420DB
Atmel AVR Studio See download instructions in Figure 8 Wireless Z-Stack User’s
Guide for the CC2420DB
Programmer’s Notepad See download instructions in Figure 8 Wireless Z-Stack User’s
Guide for the CC2420DB
Figure 8 Wireless
ZigBee Stack (“Z-
Stack”)
Mix of Source and Object code for Atmel AVR. Complete
implementation of the ZigBee Alliance specification. Compliant
with the ZigBee specification v 0.92, and updated upon ZigBee
specification changes. Full ZigBee security functionality will be
available by v1.00 release.
Included Documentation:
•User’s Guide (including instructions on how to obtain
Atmel and GCC tool sets free of additional charges)
•API descriptions for each ZigBee layer
•Programmers Guides for each sample application (see
below)
•Serial Port Interface Documentation
•OS Abstraction Layer (“OSAL”) Documentation
•ZigBee Implementer’s Guide (packaged in upcoming
releases)
Figure 8 Wireless
Sample Applications
Sample application source code for Home Control – Lighting
ZigBee Profile, including
•Switch Remote Control
•Switch Load Controller
•Light Sensor Monochromatic
•Dimmer Remote Control
•Dimmer Load Controller
•Occupancy Sensor
Sample application source code for customer specified Profiles
and applications, including
•Generic Application
•Serial Application

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Software component Description
Figure 8 Wireless
Z-Configurator
Z-Configurator (Executable): The Z-Stack Configurator is a
Windows application which enables automated customization of
ZigBee enabled applications.
Configurator features include:
•Selection of the ZigBee logical target device mapped to a
RFD or FFD.
•Selection of resources to support Association Tables,
Routing Tables, Binding Tables. In later releases,
interactive entry/feedback to permit iterative changes for
application optimal setting will be provided.
•Selection of Profiles and assignment to Endpoints.
•Selection of Device Profile network configuration
elements (beacon order, etc.).
•Automated extraction of appropriate source code and
libraries into build directory to permit creation of device
according to selections.
•End customer can further optimize resulting application.
Figure 8 Wireless
Z-Profile Builder
Z-Profile Builder (Executable): The Z-Stack ZigBee Profile
Builder is a Windows application, which enables users to create
their own profiles. The application allows the customer to
generate profiles, which can be ported into the Z-Stack
Configurator for creation of a customer specified profile assigned
to a device endpoint.
Profile Builder will enable the end customer to do the following:
•Create a new profile based on a ZigBee Alliance
assigned Profile ID.
•Define proprietary Devices based on the customer-
defined Profile.
•Define Clusters and Attributes which will form the basis of
messaging between the customer’s devices.
•Advertise Clusters on Endpoints to enable standard
ZigBee Service Discovery and Binding operations to work
using the customers proprietary Profile, Devices and
Clusters.
•Permit the customer to incorporate and utilize standard
ZigBee profiles, advertising these on a specific interface,
to permit a controlled level of interoperability (if desired)
with other standard ZigBee devices while still enabling
operation as a proprietary device.

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Software component Description
Figure 8 Wireless
Z-Trace
Z-Trace ZigBee Protocol Stack Trace Tool (Executable):
The Z-Trace is a Windows application running on Windows 2000
Pro or Windows XP Pro. The Z-Trace is designed to fulfill test and
debug functions, and operates the attached ZigBee/IEEE
802.15.4 CC2420DB through a serial cable connection.
•Permit viewing of trace and debug information from a
target unit under test
The Z-Trace consists of the following components:
•Windows executable
•Z-Trace User’s Manual and Release Notes
Table 2: CC2420 ZigBee DK Software Components
Optional software components
Table 3 below contains a description of the optional software components available
separately for the CC2420 ZigBee DK Development Kit.
Software component Description
Figure 8 Wireless
ZigBee Stack
Source code. Compliant with the ZigBee specification v 0.92, and
updated upon ZigBee specification changes. Contact your local
Chipcon sales office for further information.
Chipcon MAC layer
source code
Source code for the Chipcon MAC Sublayer. Available free of
charge, through the MAC software license agreement. Contact
your local Chipcon sales office for further information.
Table 3: CC2420 ZigBee DK Optional Software Components

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CC2420DB PCB
The PCB picture provides an overview of the CC2420DB with description of the various
components embedded on the PCB.
Figure 1: CC2420DB overview
AVR ISP
connector
Temp. sensor
PCB
antenna
Buttons
RS-232
port
Joystick
3.3V voltage
regulator
POT
LED’s
4-10 V
DC-jack
Optional 9V or
3x 1.5 AA
batteries
CC2420 RF
section
MCU sectionJTAG connector
External RAM
32 kB

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Hardware Overview
The hardware platform of CC2420 ZigBee DK is based on already established Chipcon
CC2420 kits. Detailed information about the hardware and software included in this kit can be
downloaded from the Chipcon CC2420 product site.
http://www.chipcon.com/index.cfm?kat_id=2&subkat_id=12&dok_id=115
Power Supply Section
The power supply section contains two voltage regulators. One is an external 3.3 V regulator
for use by the microcontroller and the I/O pins of the CC2420. The second is an internal
regulator of CC2420 used to generate the 1.8 V supply applied for powering of the CC2420
core.
A diode prevents permanent damage if wrong polarity is applied to the board. There are two
power connectors; a 2.5mm DC jack-type connector allows you to connect an unregulated
battery eliminator easily (the positive supply is on the center pin), and a connector for a 9V
battery on the bottoms side of the PCB. We recommend that 3 or 4 AA or AAA alkaline cells
are used to power the CC2420DB if a suitable battery pack is used.
RS-232 Interface
A serial port is included on the CC2420DB. This port can be used with the Figure 8 Wireless
Z-Trace. The port includes support for RTS/CTS-type hardware flow control (handshaking).
This port is per default always enabled by a jumper. See the jumper settings for
demonstration board control.
Microcontroller and User Interface
The microcontroller used is an AVR ATmega128L from Atmel. This controller has 128 kB of
Flash program memory, 4 kB of SRAM data memory and 4 kB of non-volatile EEPROM data
memory. The controller is interfaced to the CC2420 via its built-in SPI interface as well as few
general-purpose I/O pins.
The MCU is also connected to four LEDs, a joystick and an extra button for user interface
purposes. The different examples use these peripherals differently. An analogue temperature
sensor, a potentiometer and 32 kB of external RAM are also included.
An ISP and a JTAG ICE connector are provided for programming the AVR without using the
serial port. In this case an Atmel AVR JTAG or ISP programmer should be connected to their
respective connectors.
All of the I/O pins are connected to footprints for 2 x 10 pin-row connectors, P3 and P4. These
connectors are compatible with Agilent logic analyzer probes, and can be used either for
testing or for prototyping. For instance, it is possible to add a daughter board containing
additional circuitry using these connectors.
Connector P3 pinout
Pin
number
Signal name in
schematic
Pin usage AVR pin
1 Not Connected
(NC)
Not Applicable (N/A) N/A
2 Unregulated supply voltage
(Insert R101 to connect)
N/A
3 FORCE_ON RS-232 Force On N/A

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4 PE4 Yellow LED / RS-232 Force On
control
06 PE4
5 PE2 Joystick centre push button 04 PE2
6 PE0 ISP MOSI / Joystick up 02 PE0
7 PG3 External 32 kHz crystal /
General purpose I/O
18 PG3
8 PE1 ISP MISO / Joystick right 03 PE1
9 PG4 External 32 kHz crystal /
General purpose I/O
19 PG4
10 PE5 Push button S2 07 PE5
11 PE3 Red LED 05 PE3
12 PE6 Joystick interrupt 08 PE6
13 RTS RS-232 handshaking 30 PD5
14 PE7 External interrupt / General
purpose I/O
09 PE7
15 RXD1 RS-232 data from PC 27 PD2
16 PB7 Green LED 17 PB7
17 CTS RS-232 handshaking 32 PD7
18 PB4 Orange LED 14 PB4
19 TXD1 RS-232 data to PC 28 PD3
20 GND Ground N/A
Table 4: P3 pinout
Connector P4 pinout
Pin
number
Signal name in
schematic
Pin usage CC2420 pin AVR pin
1 NC N/A N/A N/A
2 AREF Voltage reference for A/D
Converter.
N/A 62
3 RESET Reset N/A 20
4 SCLK CC2420 SPI clock, AVR
ISP
32 (SCLK) 11
5 PF1 Joystick left N/A 60
6 SO CC2420 SPI out 34 (SO) 13
7 PF2 Joystick N/A 59
8 SI CC2420 SPI in 33 (SI) 12
9 PF3 Temperature sensor N/A 58
10 VREG_EN CC2420 voltage regulator
enable
41 (VREG_EN) 15

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11 PF0 Potentiometer N/A 61
12 FIFO CC2420 FIFO 30 (FIFO) 26
13 CSn CC2420 SPI chip select 31 (CSn) 10
14 FIFOP CC2420 FIFOP 29 (FIFOP) 25
15 3.3V 3.3V Regulated supply N/A N/A
16 RESETn CC2420 Reset 21 (RESETn) 16
17 N.C. N/A N/A N/A
18 CCA CC2420 Clear Channel
Assessment
28 (CCA) 31
19 SFD CC2420 Start of Frame
Delimiter
27 (SFD) 29
20 GND Ground N/A N/A
Table 5: P4 pinout
External RAM
The lower 4 kB of the external RAM is remapping of the Atmega128L internal register and
RAM. CC2420DB includes this memory because it can be used for debugging purposes, to
buffer and store data if desired. The 32 kB RAM size is not a requirement nor necessary for a
low cost ZigBee logical device mapped to a Full Functional Device (FFD) or Reduced
Functional Device (RFD).
RAM requirements for a ZigBee application:
•End Devices: minimum 1.5 kB
•Coordinator or Router: minimum 2.5 kB
These numbers are highly dependent on how the end user configures their solution.
Important notice:
The CC2420DB, which is incorporated in the CC2420 ZigBee DK, is mounted with one 32kB
external SRAM. Please note that when measuring the current consumption of one of the
ZigBee device in the sample application, the RAM will contribute with 2mA in any power down
mode applied, since it is not possible to shut down the power supply.
Memory Requirements
The Z-Stack is running on the CC2420DB Demonstration Board, which contains the AVR-
ATmega128L microcontroller. The overall Z-Stack memory requirement will depend upon
compiler, code optimization level, application specific code including application profiles,
microcontroller platform, and additional features, e.g. security.
If you want to use a different microcontroller platform it will be important to keep in mind when
the Z-Stack is ported the memory requirement will depend on the items described above.
The complete Figure 8 Wireless ZigBee stack (Z-Stack) will have a memory requirement in
the range of 60kB for a ZigBee Coordinator. Additional flash size must be available for the
application. Keep in mind that these numbers are preliminary and are microcontroller
dependant.
Unfortunately, it is very difficult to say anything exact with respect to code and RAM size
requirements for ZigBee. Different ZigBee applications and configurations will also have
different memory requirements. You should also consider the ZigBee stack profiles which
defines how many other routers / end devices must be handled by a router / coordinator. This
will mostly affect the RAM requirements, and will e.g. be different in a home application from

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an industrial application. The application will of course also need a certain amount of
resources, which is very difficult to estimate at this stage.
CC2420DB Low Power Mode Support
To apply certain low power modes with CC2420DB for application development, it will be
necessary to apply an additional clock source together with the 8 MHz crystal oscillator. The
Atmega128L provides the Timer/Counter oscillator pins (TOSC1 and TOSC2), and these pins
are available on the CC2420DB connector P3. The oscillator is optimized for use with a
32.768 kHz crystal. This clock source can be connected the following ways.
1. A crystal can be connected directly between the pins.
2. An external clock source can be applied to the TOSC1 pin. Atmel does not
recommend this method.
The timer 0 will be clocked by the 32.768 kHz crystal oscillator and then the overflow or
compare match timer interrupt is applied to wake up ATmega128L from power save mode.
Please refer to the ATmega128L data sheet for more details on the various power down
modes of the microcontroller.
Pin Name Connector P3 Atmega128
L
TOSC1 (PG4) Pin 9 Pin 19
TOSC2 (PG3) Pin 7 Pin 18
Table 6: Low power mode signal
To demonstrate an application using the power down mode:
1. Apply 3x 1.5 AA batteries with the battery clip included in the kit.
2. The library macros will be made available on how to set the ATmega128L into the
various power mode that can apply to minimize the current draw on CC2420DB.
3. Apply the joystick switch as the external interrupt to wake up the ATmega128L to idle
mode and run an application.
CC2420DB Temperature Range
The CC2420DB can support a temperature range of -30˚C to +85˚C.
Jumper Settings for CC2420DB Control
The CC2420DB has three default jumper settings for proper operation. Figure 2 depicts the
placement of the three jumpers J1, J2 and J3. They are mounted on connector P9. Please
refer to CC2420DBK User Manual schematics page 1 for more details.

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Jumper Purpose Comments
J1 To apply power of 3.3V to the
circuitry on the PCB board
An option can be to remove
the jumper and connect an
ampere meter in series to
measure current
consumption
J2 To apply power of 3.3V to the
potentiometer and
temperature sensor on the
PCB board
Can be removed to
disconnect the devices if not
used, to decrease current
consumption
J3 To always have the RS-232
driver enabled, hence the
driver is forced on
This jumper can be
disconnected and controlled
by software instead if desired
Table 7 Jumper explanation
The J3 jumper can permanently disable the RS-232 port by grounding the control signal when
moving the jumper to connect pin 6 and 8 together on connector P9.
J2J3
J1
Figure 2 Jumpers

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Figure 3 Jumpers on CC2420DB
To enable software control of the RS-232 driver U101, the jumper J3 can be moved.
Step-By-Step procedure:
1. Move RS-232 jumper J3 from P9 to P3 between pin 3 and 4
2. It will share the same port pin PE4 as the yellow LED, so when RS-232 is on the LED
will be set.
CC2420DB Current Measurement and Consumption
It is fully possible to measure the actual current consumption with CC2420DB. To measure
the current jumper J1 must be removed and an ampere meter connected in series. The
current measurement is performed for the current total draw of the CC2420DB.
A
P3
12
Figure 4: Connector P3 with ampere meter attached
To help minimize the current consumption of the CC2420DB for a specific ZigBee device the
default jumper J3 can be moved to enable software control of the RS-232 driver.
The external RAM will always draw 2mA in any power down mode since its power supply
cannot be disabled. Hence, if the external RAM (U3) is removed the current consumption will
decrease with 2mA.
The jumper J2 is controlling the power for the potentiometer (RT1) and temperature sensor
(U2), which will also contribute to the total current consumption in any power down mode.
Jumper J1
Jumper J2
Jumper J3

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Using the CC2400EB and CC2420EM for ZigBee Packet Sniffing
The capability to sniff ZigBee network traffic is provided using the CC2400EB and
CC2420EM along with Chipcon’s Packet Sniffer software. This software can be used as an
IEEE 802.15.4 compliant packet parser as well.
Figure 5: CC2400EB + CC2420EM
Step-by-Step procedure for use of the Packet Sniffer:
1. Install the Packet Sniffer software
http://www.chipcon.com/index.cfm?kat_id=2&subkat_id=12&dok_id=115
2. Plug in the USB cable between the PC and CC2400EB
3. Plug in power supply
4. Restart your computer so Windows can detect the board.
5. Reset CC2400EB with the reset button (Optional).
6. After about 5 seconds the LED's start to blink as a binary counter.
7. Start the Packet Sniffer (The LEDs will continue to blinking)
a. The CC2400EB will be detected in the selection window. See figure 6
8. Select an IEEE 802.15.4 channel.
9. Press the “Capture” button on the menu bar to start the sniffer (LED’s will be cleared)
a. When the Packet Sniffer is running, the LEDs will blink when packets are
received. See figure 7

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Figure 6: Packet Sniffer
In order to do ZigBee network layer (NWK) or Application Support Sub layer decodes, go to
the "Select Fields" section of the sniffer. Use the "MAC Fields", "NWK Fields" and "APS
Fields" at the bottom to switch between the different levels of decoding. See figure 7 for an
example.
•Decoding of NWK layer command frames is implemented
•Decoding of APS layer command frames. They should appear with the undecoded
APS payload.
•There is no decoding of ZigBee Device Objects (ZDO) / Profile information. I.e., the
APS payload is shown directly.

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Figure 7: Packet Sniffer Capture Window
Using the CC2420DB Demonstration Board with the Z-Stack
The CC2420DB is designed for quick prototyping, and also for quick practical evaluation such
as range testing with the Z-Stack for sample ZigBee logical devices.
Software can be programmed into the Atmega128L microcontroller using an external
programmer such as the AVR JTAG ICE mkII provided with the kit. Alternatively, the AVR ISP
programmer can also be used.
No CC2420DB in the CC2420 ZigBee DK is preprogrammed with a ZigBee Home Control
Lighting Profile device.
IEEE 64- bits Extended Address
Each CC2420DB is preprogrammed with an IEEE extended address in the ATmega128L
microcontroller EEPROM. The IEEE address is stored at EEPROM location 0x0000.
CC2420DB Z-Stack Download and Debugging Using AVR Studio 4
Use a serial cable to connect the serial interface of the CC2420DB to the serial port of a PC
running AVR Studio and Z-Trace for debugging information from the Figure 8 Wireless Z-
Stack. When the CC2420DB RS-232 port is connected the Z-Trace can display debugging
information if the compile switch in the make file is set. Please refer to the Z-Stack Compile
Options used with CC2420 and figure 9 for hardware setup.

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Figure 8: Z-Trace view
Note:
Chipcon’s SmartRF®Studio cannot communicate with the CC2420DB, but can be used to
find optimum register values for the CC2420.
Power
supply
220V
PC running
Z-Trace & AVR
Studio
Serial cable CC2420DB
4-10V
Serial cable
AVR ISP /
JTAG ICE
Programmer
OR
Figure 9: Software download using AVR Studio 4

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Preprogrammed Fuses
The configuration of the processor fuses can be performed through the SPI interface with the
AVR ISP programmer or the JTAG ICE programmer and AVR Studio 4. The JTAG ICE fuse
window is depicted in figure 10. The CC2420DB is configured with the following fuses
enabled:
1. On Chip Debug Enabled
2. JTAG Interface Enabled
3. Serial program downloading (SPI) enabled
4. Preserve EEPROM memory through the Chip Erase Cycle
5. Boot Flash section size = 512 Boot start address
6. Brown-out detection level at VCC=2.7 V
7. Brown-out detection enabled
8. Ext.Crystal/Resonator High Freq.; Start Up time: 1CK + 4 ms [CKSEL=1111 SUT=11]
Note:
When using the JTAG ICE or the AVR ISP programmer the boot vector fuse must be
disabled. The CC2420DB for the CC2420 ZigBee DK will not be programmed with a
bootloader.
Figure 10: AVR Studio Fuses Window