RFM75P Datasheet, PDF (3/26 Pages) List of Unclassifed Manufacturers – Low Power High Performance 2.4 GHz GFSK Transceiver

RFM75P V1.0
1 General Description
RFM75P is a GFSK transceiver operating
in the world wide ISM frequency band at
2400-
2483.5 MHz. Burst mode transmission and up
to 2Mbps air data rate make them suitable for
applications requiring ultra low power
consumption. The embedded packet
processing engines enable their full operation
with a very simple MCU as a radio system.
Auto re-transmission and auto acknowledge
give reliable link without any MCU
interference.
RFM75P operates in TDD mode, either as a
transmitter or as a receiver.
The RF channel frequency determines the
center of the channel used by RFM75P.
The frequency is set by the RF_CH register in
register bank 0 according to the following
formula: F0= 2400 + RF_CH (MHz). The
resolution of the RF channel frequency is
1MHz.
A transmitter and a receiver must be
programmed with the same RF channel
frequency to be able to communicate with
each other.
The output power of RFM75P is set by
the
RF_PWR bits in the RF_SETUP register.
Demodulation is done with embedded data
slicer and bit recovery logic. The air data rate
can be programmed to 250Kbps, 1Mbps or
2Mbps by RF_DR_HIGH and RF_DR_LOW
register. A transmitter and a receiver must be
programmed with the same setting.
In the following chapters, all registers are in
register bank 0 except with explicit claim.
Figure 1 RFM75P Chip Block Diagram
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