CC2400_07 Datasheet, PDF (36/83 Pages) Texas Instruments – 2.4 GHz Low-Power RF Transceiver

CC2400
26 Power Management Flow Chart
CC2400 offers great flexibility for power
management in order to meet strict power
consumption requirements in battery-
operated applications.
After reset the CC2400 is in Power Down
mode. All configuration registers can then
be programmed in order to make the chip
ready to operate at the correct frequency,
data rate and mode. Due to the very fast
start-up time, the CC2400 can remain in
Power Down until a transmission session
is requested.
Figure 16 shows a typical power-on and
initializing sequence. After this initializing
sequence the chip is in Power Down mode
with very low power consumption and the
crystal oscillator is not running.
Figure 17 shows the sequence for
entering RX or TX mode. The flow chart
illustrates the simplest way to send a data
packet using the strobe command
registers. After one or more data packets
are transmitted or received, the chip is
again set to Power Down mode.
During chip initialization a few registers
need to be programmed to other values
than their reset values. SmartRF^® Studio
should be used to find/generate the
required configuration data for these
registers.
Power off
Supply power turned on
Reset:
MAIN = 0x0000
MAIN = 0x8000
Program all registers that are
different from reset value
Power Down
Figure 16. Initializing sequence
SWRS042A
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