CC2550_13 Datasheet, PDF (25/61 Pages) Texas Instruments – Low-Cost Low-Power 2.4 GHz RF Transmitter

CC2550
16 Radio Control
MANCAL
3,4,5
CAL_COMPLETE
SCAL
SIDLE
IDLE
1
STX | SFSTXON
SPWD
CSn = 0
SXOFF
CSn = 0
SLEEP
0
XOFF
2
FS_WAKEUP
6,7
FS_AUTOCAL = 00 | 10 | 11
&
STX | SFSTXON
FS_AUTOCAL = 01
&
STX | SFSTXON
CALIBRATE
8
SFSTXON
FSTXON
18
SETTLING
9,10,11
STX
CAL_COMPLETE
STX
TXOFF_MODE = 01
TXOFF_MODE = 10
TX
19,20
TXFIFO_UNDERFLOW
TXOFF_MODE = 00
&
FS_AUTOCAL = 10 | 11
TX_UNDERFLOW
22
TXOFF_MODE = 00
&
FS_AUTOCAL = 00 | 01
CALIBRATE
12
SFTX
IDLE
1
Figure 13: Complete Radio Control State Diagram
CC2550 has a built-in state machine that is
used to switch between different operation
states (modes). The change of state is done
either by using command strobes or by
internal events such as TX FIFO underflow.
A simplified state diagram, together with
typical usage and current consumption, is
shown in Figure 4 on page 13. The complete
radio control state diagram is shown in Figure
13. The numbers refer to the state number
readable in the MARCSTATE status register.
This register is primarily for test purposes.
16.1 Power-On Start-Up Sequence
When the power supply is turned on, the
system must be reset. One of the following two
SWRS039B
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