CC2400 Datasheet, PDF (37/84 Pages) Texas Instruments – 2.4 GHz Low-Power RF Transceiver

CC2400
PD
(Power Down)
SXOSCON
Wait until crystal oscillator is
stable
Wait for the specified crystal
oscillator start-up time, or poll the
XOSC16M_STABLE bit
IDLE
(XOSC is running)
SFSON
The PLL and filters are
calibrated
FSON
(XOSC and PLL is running)
RX: SRX
RX or TX?
Data is received. FIFO should
be read if buffered mode is
used
TX
Write data to FIFO
TX: STX
Data is transmitted. FIFO
should be filled if buffered
mode is used
NO: SFSON
Go to
power
down?*
YES: SXOSCOFF
YES: SXOSCOFF
Go to
power
down?*
NO: SFSON
NO: SRFOFF
NO: SRFOFF
Power Down
*Go to PD state if the crystal oscillator
should be shut off in order to save
power. Go back to IDLE if a new
packet shall be received/transmitted
quickly. Or go back to FSON if
changing fast between RX and TX
mode.
Figure 17. Sequence for activating RX or TX mode
SWRS042A
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