RF70 Datasheet, PDF (3/25 Pages) –

1 General Description
RF70 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.
RF70 operates in TDD mode, either as a
transmitter or as a receiver.
The RF channel frequency determines the
center of the channel used by RF70. The
frequency is set by the RF_CH register in
register bank 0 according to the following
formula: F0= 2400 + RF_CH (MHz). The
RF70 V1.0
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 RF70 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 1Mbps or 2Mbps by
RF_DR 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.
RFP
RFN
Integrated
TDD RF
Transceiver
FM
Demodulator
Power
Management
FM Modulator
Data Slicer
Gaussian
shaping
Rx FIFO
Packet
Processing &
State Control
Tx FIFO
XTALP XTALN
Figure 1 RF70 Chip Block Diagram
CSN
SCK
MOSI
MISO
IRQ
CE
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