Radio Control; Power-On Start-Up Sequence - Texas Instruments CC2500 TK Manual

19 Radio Control

MANCAL
3,4,5
STX
TXOFF _ MODE=01
TX
TXOFF _ MODE = 10
19,20
TXFIFO _ UNDERFLOW
TXFIFO_UNDERFLOW
22
CC2500 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 5 on page 15. The complete
radio control state diagram is shown in Figure
15. The numbers refer to the state number
CAL_ COMPLETE
SCAL
SRX | STX | SFSTXON | WOR
FS_ AUTOCAL= 00 | 10 | 11
&
SRX | STX | SFSTXON | WOR
SFSTXON
FSTXON
18
STX
SFSTXON | RXOFF _ MODE = 01
SRX
RXTX_ SETTLING
STX | RXOFF _ MODE = 10
SRX | TXOFF _ MODE = 11
TXRX_ SETTLING
TXOFF _ MODE = 00
&
FS_ AUTOCAL= 10 | 11
TXOFF _ MODE = 00
&
FS_ AUTOCAL= 00 | 01
SFTX
Figure 15: Complete Radio Control State Diagram
SWRS040C
SIDLE
SPWD | SWOR
IDLE
CSn = 0 | WOR
1
SXOFF
CSn = 0
FS_ WAKEUP
6,7
FS_ AUTOCAL= 01
&
SRX | STX | SFSTXON | WOR
CALIBRATE
8
CAL_ COMPLETE
SETTLING
9,10,11
SRX | WOR
( STX | SFSTXON) & CCA
21
|
RXOFF _ MODE= 01 | 10
16
RXOFF _ MODE= 00
&
FS_ AUTOCAL= 10 | 11
CALIBRATE
12
RXOFF _ MODE = 00
&
FS_ AUTOCAL= 00 | 01
IDLE
1
readable in the MARCSTATE status register.
This register is primarily for test purposes.
19.1

Power-On Start-Up Sequence

When the power supply is turned on, the
system must be reset. One of the following two
sequences
power-on reset (POR) or manual reset.
CC2500
SLEEP
0
XOFF
2
RX
RXOFF _ MODE = 11
13,14,15
RXFIFO _ OVERFLOW
RXFIFO_OVERFLOW
17
SFRX
must be followed:
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