nRF24LE1 Nordic VLSI, nRF24LE1 Datasheet - Page 17

• Manufacturer Part Number: nRF24LE1
• Manufacturer: Nordic VLSI

nRF24LE1 Preliminary Product Specification
3.2
3.3
This section describes the different operating modes of the RF Transceiver and the parameters used to
control it.
The RF Transceiver module has a built-in state machine that controls the transitions between the different
operating modes. The state machine is controlled by SFR register RFCON and RF transceiver register
CONFIG, see
3.3.1
You can configure the RF Transceiver to power down, standby, RX and TX mode. This section describes
these modes in detail.
3.3.1.1
The state diagram
the end of the reset sequence the RF Transceiver enters Power Down mode. When the RF Transceiver
enters Power Down mode the MCU can still control the module through the SPI and the rfcsn bit in the
RFCON register.
There are three types of distinct states highlighted in the state diagram:
Revision 1.1
ANT1
ANT2
RFCON.rfcken
•
•
•
Recommended operating mode: is a recommended state used during normal operation.
Possible operating mode: is a possible operating state, but is not used during normal operation.
Transition state: is a time limited state used during start up of the oscillator and settling of the PLL.
RF Transmitter
RF Receiver
Block diagram
Functional description
Operational Modes
LNA
section 3.5
State diagram
RF Synthesiser
PA
(Figure
XOSC16M
for details.
6.) shows the operating modes of the RF Transceiver and how they function. At
Filter
Filter
TX
RX
Power Management
Figure 5. RF Transceiver block diagram
Demodulator
Modulator
GFSK
GFSK
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Baseband
Enhanced ShockBurst
Baseband Engine
Radio Control
RX FIFOs
TX FIFOs
(Slave)
SPI
RFCON.rfce
RFCON.rfcsn
RFIRQ
(Master)
SPI