CC400

SWRS050

Page 10 of 32

12.

Configuration Overview

CC400 can be configured to achieve the best performance for different applications. Through

the programmable configuration registers the following key parameters can be programmed:

• Receive/Transmit mode.

• RF output power level.

• Power amplifier operation class (A, AB,

B or C).

• Frequency synthesiser key parameters:

RF output frequency, FSK modulation

frequency

separation

(deviation),

crystal oscillator reference frequency.

• Power-down/power-up mode.

• Reference oscillator on or off in power

down

mode

(when

on,

shorter

frequency synthesiser start-up time is

achieved).

• The IF (intermediate frequency) can be

set to either 60 kHz or 200 kHz using

on-chip filters, or 455 kHz using an

external filter.

• Data rate can be selected.

• Synthesiser lock indicator mode. The

lock detection can be enabled/disabled.

When enabled, two lock detection

modes can be chosen, either "mono-

stable" or continuous.

• In receive mode precharging of the

demodulator can be used to achieve

faster settling time (see p.21).

13.

Configuration Software

Chipcon will provide users of

CC400 with a

program,

SmartRF

Studio

(Windows

interface) that generates all necessary

CC400 configuration data based on the

user's selections of various parameters.

Based on the selections 8 hexadecimal

numbers

are

generated.

These

hexadecimal numbers will then be the

necessary input to the microcontroller for

configuration of

CC400. In addition the

program will provide the user with the

component values needed for the PLL

loop filter and the input/output matching

circuit.

Figure 3 shows the user interface of the

CC400 configuration software.

Figure 3: SmartRF Studio user interface.