Data Sheet

Page 19
RFM69HCW
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3.3. Transmitter Description
The transmitter of RFM69HCW comprises the frequency synthesizer, modulator and power amplifier blocks.
3.3.1. Architecture Description
LNA
RFIO
Receiver Chain
PA0
PA1
Local
Oscillator
PA_BOOST
PA2
Figure 4. Transmitter Block Diagram
3.3.2. Bit Rate Setting
When using the RFM69HCW in Continuous mode, the data stream to be transmitted can be input directly to the modulator
via pin DIO2/DATA in an asynchronous manner, unless Gaussian filtering is used, in which case the DCLK signal on pin
DIO1/DCLK is used to synchronize the data stream. See section 3.3.5 for details on the Gaussian filter.
In Packet mode or in Continuous mode with Gaussian filtering enabled (refer to section 5.5 for details), the Bit Rate (BR) is
controlled by bits BitRate in RegBitrate:
F
BR
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BitRate
Amongst others, the following Bit Rates are accessible: