Texas Instruments CC2500 - Page 82

CC2500
S
WRS040
C
Page
82
of
89
0x33 (0xF3): LQI
–
Demodulat
or
E
stimate for Link Quality
Bit
Field Name
Reset
R/W
Description
7
CRC_OK
R
The last CRC comparison matched. Cleared when
entering/
restarting RX mode. Only
valid
if
PKTCTRL0.CC2400_EN
=1
.
6:0
LQI_EST[6:0]
R
The Link Quality Indicator estimates how easi
ly a received signal
can be demodulated. Calculated over the 64 symbols following
the sync word
.
0x34 (0xF4): RSSI
–
Received Signal Strength I
ndication
Bit
Field Name
Reset
R/W
Description
7:0
RSSI
R
Received signal strength indicator
0x35 (0xF5):
MARCSTATE
–
Main Radio Control State
Machine S
tate
Bit
Field Name
Reset
R/W
Description
7:5
Reserved
R0
4:0
MARC_STATE[4:0]
R
Main Radio Control FSM State
Value
State name
State (
Figure
15
, page
39
)
0 (0x00)
SLEEP
SLEEP
1 (0x01)
IDLE
IDLE
2 (0x02)
XOFF
XOFF
3 (0x03)
VCOON_MC
MANCAL
4 (0x04)
REGON_MC
MANCAL
5 (0x05)
MANCAL
MANCAL
6 (0x06)
VCOON
FS_WAKEUP
7 (0x07)
REGON
FS_WAKEUP
8 (0x08)
STARTCAL
CALIBRATE
9 (0x09)
BWBOOST
S
ETTLING
10 (0x0A)
FS_LOCK
SETTLING
11 (0x0B)
IFADCON
SETTLING
12 (0x0C)
ENDCAL
CALIBRATE
13 (0x0D)
RX
RX
14 (0x0E)
RX_END
RX
15 (0x0F)
RX_RST
RX
16 (0x10)
TXRX_SWITCH
TXRX_SETTLING
17 (0x11)
RX
FIFO
_OVERFLOW
RX
FIFO
_OVERFLOW
18 (0x12)
FSTXON
FSTXON
19 (0x13)
TX
TX
20 (0x14)
TX_END
TX
21 (0x15)
RXTX_SWITCH
RXTX_SETTLING
22 (0x16)
TX
FIFO
_UNDERFLOW
TXFIFO
_UNDERFLOW
Note: it is not possible to read back the SLEEP or XOFF state numbers
because setting CSn low will make the chip enter the IDLE mode fr
om
the SLEEP or XOFF sta
tes.