LAYOUT SKETCHES, ASSEMBLY DRAWINGS AND CIRCUIT DIAGRAM ............................................. 10
BILL OF MATERIALS................................................................................................................. 17
USING THE DEVELOPMENT KIT.......................................................................................... 22
GENERAL INFORMATION.......................................................................................................... 23
SWRU058 Page 2 of 24
Introduction
The CC1000 single chip transceiver includes many features and great flexibility which makes
the chip suitable for a very large number of applications and system requirements. The
CC1000DK Development Kit is designed to make it very easy for the user to evaluate
transceiver performance and in short time develop his own applications.
The Development Kit includes two evaluation boards with a complete CC1000 transceiver,
voltage regulator and PC interface circuitry. Using the evaluation board connected to a PC
running the SmartRF
tested by keystrokes.
Technical features:
- RF power up to 10 mW (10 dBm) programmable in 1dB steps
-109 dBm sensitivity for 10
- Logic level data input/output (Manchester coded or NRZ)
- Logic level synchronisation clock output
- RSSI output
- 10.7 MHz IF output
®
Studio software, various system parameters can be changed and
-3
bit error rate
- Selectable RF filtering (SAW or LC)
- All set-up controlled by PC
- Selectable 3V or 4-10Vunregulated voltage supply inputs
This user manual describes how to get started with the Development Kit. You will also find
detailed description of the evaluation board and advice how to develop your own applications.
For details on how to use the SmartRF
®
Studio software please refer to the SmartRF® Studio
User Manual.
®
Your SmartRF
CC1000DK Development Kit should contain the following items:
Evaluation Board (CC1000EB) 2 ex
PC parallel port extension cable 2 ex 25-pin D-sub, male-female, 3m
Adapter 6 ex SMA male-BNC female
Antenna 2 ex 50Ω, λ/4 monopole, SMA male
CC1000 samples 5 ex
Quick Start User Manual
SmartRF
®
CD-ROM
The evaluation board includes a significant number of components for great flexibility.
However, only a minor part of these components are required in an actual application. Check
the datasheet for a typical application circuit.
Evaluation Board
The kit includes an Evaluation Board (CC1000EB) with the following items:
SWRU058 Page 3 of 24
®
• A SmartRF
CC1000 chip.
• Necessary external surface mounted devices, SMDs, for the chip.
• Voltage regulator 4V-10V to 3V regulated voltage.
• Possibilities to apply a 3V voltage source directly (chosen by the switch on the board).
• Voltage-level interface circuits between the CC1000 chip (3V) and the parallel port of
the computer (5V).
• Connector for a PC parallel port cable.
• Connector for antenna, modulation data in/out, synchronisation clock out, RSSI out
and IF out.
•Edge connector for future use.
This board is designed with great flexibility so that you can evaluate the circuit performance
for several circuit configurations, and in development of your own applications. A layout
sketch of the evaluation board is shown in chapter 0.
The evaluation board is distributed in two versions, and the difference is the frequency band
of operation. The two versions are optimised for 434 MHz and 869 MHz to cover the two
licence free band in Europe. The operating frequency band is marked on the Evaluation
Board.
Description
The evaluation circuit board constitutes of three main parts. These are the RF-section, the
voltage supply and the PC-interface. The PC-interface contains voltage level shift circuit,
which buffers the control lines.
Voltage supply
You can chose between applying a 4-10V non-regulated supply voltage or a 3V regulated
supply voltage by setting a switch on the board (SPDT). If a non-regulated supply voltage is
applied, an on board regulator generates a regulated 3V supply. A diode prevents damage if
wrong polarity is used for the non-regulated input. The connector has five contacts, which is
shown below. In addition to the three supply voltage contacts, there are two contacts, which
can be used to measure the DC current to the CC1000 chip. A short jumper is placed
between these two contacts for the circuit to work. If you want to measure the DC current,
replace the jumper with an amperemeter (as shown in the figure below). The current range is
from 0 to 26 mA.
SWRU058 Page 4 of 24
A
4-10V
0V
3V
I
out
I
in
Figure: The power connector with an amperemeter attached.
RF-section
The RF section consists of a CC1000 chip with external components. The different
components are explained below.
The loop filter
The CC1000 has integrated the loop-filter and shaping features on-chip. For flexibility it is
also possible to use an external loop-filter. The PLL loop filter contains the components
C121-C122 and R121. However, in most cases the internal filter will give the optimum
performance. The loop filter is connected to the same pin as the monitoring of the lock
indicator (see 2.1.4). When external loop-filter is added, the R122 must be removed to avoid
conflict with the lock line connected to the parallel port.
The LOCK signal
A LOCK signal is connected to the parallel port interface to be monitored by the software. The
signal tells you if the synthesiser frequency is in lock. It is also available at a test pin, TP2,
and is active high.
This digital output can also be configured to other functions, as control signal for external PA
or external LNA. Please see the data sheet for details.
Note: To monitor this signal CC1000 must be configured to take out this signal on CHP_OUT.
This is the default setting of SmartRF
®
Studio. If external loop filter is added the lock signal
can not be used due to the loop filter is connected to the same pin.
SWRU058 Page 5 of 24
DIO and DCLK
The modulation input/output (DIO) and the synchronisation output (DCLK) is connected to
separate connectors. The connectors are of SMA female type. The data to be sent can be of
either Manchester or NRZ. The Manchester code ensures that the signal has no DC
component. The Manchester code is based on transitions; a “0” is encoded as a low-to-high
transition, a “1” is encoded as a high-to-low transition. See figure below. Maximum data-rate
is 9.6 kbit/s giving a baud rate of 19.2 kbaud that is chosen in the software. For NRZ the baud
rate is equal to the bit rate and is maximum 19.2 kbaud.
To test your module use a 3V
logic level with 1-10 kHz square wave for Manchester coded
pp
data and 1- 20 kHz square wave for NRZ data.
The CC1000 has an internal clock synchronisation circuit that can be monitored on DCLK.
The relationship between DIO and DCLK is given below, for the different modes of C1000.
Please see datasheet for details.
SWRU058 Page 6 of 24
Synchronous NRZ mode
Synchronous Manchester encoded mode
Transparent Asynchronous UART mode
SWRU058 Page 7 of 24
RSSI/IF
The RSSI/IF is connected to a separate connector of SMA female type. This pin is connected
from the CC1000 via a serial resistor (R280), and a shunt R (R281) and C(C281). The default
of this components is set to give out RSSI information, and the measured voltage will be
between 0 - 1.2 V. Based on this voltage the received signal strength can be calculated as
given in the CC1000 data sheet.
The RSSI/IF can also be configured to take out the 10.7 MHz IF frequency. This is useful if an
external demodulator is needed for narrow band applications. This demodulator can easily be
connected to the RSSI/IF connector. The components R180, R181, and C181 must in this
case be changed to matching elements. Please see the data sheet for details.
LNA/PA matching
The input/output matching network is optimised for either 434 MHz or 868 MHz operation.
The component values are calculated in the software program, and consist of L41, L42, C51,
L51 and C52. Using the specified component values for the input/output match will give an
optimum match at the specified operating frequency. Minor tuning of the component values
may be necessary to compensate for layout parasitics at other frequencies or other layouts.
The crystal oscillator
Crystal frequency is set to 14.7456 MHz, X1. The crystal oscillator circuit has a trimmer
capacitor, CT152, which reduces the initial tolerance of the crystal to zero by careful
adjustment using a precision frequency counter. The crystal used at this board has ±10 ppm
accuracy and ±10 ppm over the –10 to +70 °C temperature range. The crystal oscillator has
an AC coupled (C153) test pin for external clock injection, TP1. Be sure to remove the crystal
when an external clock is used. The external clock should have amplitude of 1-3V
. The
pp
loading capasitors are designed for a 12 pF crystal load.
The RF filter options
There are three RF filter options: LC-filter, SAW filter, or no filter used. Each of the three filter
alternatives is equipped with a female SMA antenna connector. To choose between the three
filters there is a zero ohm resistor that can be moved (R61-R63).
Unfiltered antenna output
To select an unfiltered this output the zero ohm resistor must be put in R61, and R62 and
R63 shall not be mounted.
LC-filtered antenna output
SWRU058 Page 8 of 24
To choose the LC filtered antenna output the zero ohm resistor must be put in the R62
position. A LC-filter consisting of L52, C52 and C53 make up a 3dB-equal ripple low-pass
filter that prevents harmonics to be emitted from the transmitter. In receive mode the filter
removes high frequencies in order to prevent distortion and jamming of the receiver. The filter
is designed for 50Ω termination impedance. The LC-filter is selected by placing the zero ohm
resistor in the R62 position. For operation at other frequencies, use the formulas below.
1
⎛
where ω
To choose the SAW filtered antenna output the zero ohm resistor must be put in the R63
position. The components around the filter (F2) can be changed to match any SAW filter type.
The SAW filter will introduce additional loss, but will increase the selectivity of the receiver.
ωω
⎜
RFC
is the cut-off frequency and ωRF is the transmitted RF frequency .
C
−⋅≈1333.01
⎝
⎞
,
⎟
L
⎠
SAW filtered antenna output
6.35
=
ω
,
C
C
067.0
=
ω
,
C
SWRU058 Page 9 of 24
Layout sketches, assembly drawings and circuit diagram
Note: Items shaded are different for different frequencies
SWRU058 Page 21 of 24
Using the Development Kit
The purpose of the Development Kit is to give users of the integrated transceiver CC1000
hands-on experience with the chip. A typical set-up of the evaluation board is shown below.
Each of the evaluation boards is connected to a PC to be programmed by the software.
•How to set up a transmitter.
The data signal that you want to send in transmit mode can be of either Manchester or NRZ
code. A square wave from a function generator can be used to generate this data. The signal
source shall be connected to the Data I/O port (DIO) at the evaluation board. The signal must
be a square wave from 0 to 3V as shown. Do not apply a 5V signal because it can damage
the CC1000 chip. The signal from the function generator will represent either zeroes or ones,
and the bit rate in Manchester coded will be 1/T, where T is the period time. For the NRZ
case, the bit rate is given by 2/T due to the fact that the bit rate is equal to the baud rate in
NRZ.
3V
T
The transmitted signal can be studied on a spectrum analyser, sent out on the antenna (see
note below) or sent to the receiver via a cable with an attenuator attached.
Figure: Equipment set-up in transmit mode.
SWRU058 Page 22 of 24
•How to set up a receiver
In receive mode a RF generator can be connected to the antenna input to give an ideal RF
signal to the circuit board for testing the receiver. Use FSK modulation with appropriate
deviation and modulation rate. If you don’t have the equipment to send FSK modulation, you
can use a RF generator with FM modulation and use an external function generator to
modulate the signal with a square wave. The RF signal can also come from the transmitter
via the antenna. An oscilloscope is used to see the signal that is being received.
Figure: Equipment set-up in receive mode.
Important: The use of radio transceivers is regulated by international and national rules.
Before transmitting a RF signal out on the antenna, please contact your local
telecommunication authorities to check if you are licensed to operate the transceiver.
General Information
Chipcon AS believes the furnished information is correct and accurate at the time of this
printing. However, Chipcon AS reserves the right to make changes to this product without
notice. Chipcon AS does not assume any responsibility for the use of the described product.
Please refer to Chipcon’s web site for the latest update.
SmartRF
platform with RF library cells, modules and design expertise. Based on SmartRF
®
is a registered trademark of Chipcon AS. SmartRF® is Chipcon's RF technology
®
Chipcon
develops standard component RF-circuits as well as full custom ASICs based on customers'
requirements.
SWRU058 Page 23 of 24
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