CC1050_08 Datasheet, PDF (34/42 Pages) Texas Instruments – Single Chip Very Low Power RF Transmitter

CC1050
LOCK Register (0Dh)
REGISTER
NAME
LOCK[7:4] LOCK_SELECT[3:0]
Default
value
0000
Active
-
Description
Selection of signals to CHP_OUT (LOCK) pin
0000 : Normal, pin can be used as CHP_OUT
0001 : LOCK_CONTINUOUS (active high)
0010 : LOCK_INSTANT (active high)
0011 : ALARM_H (active high)
0100 : ALARM_L (active high)
0101 : CAL_COMPLETE (active high)
0110 : Not used
0111 : REFERENCE_DIVIDER Output
1000 : TX_PDB (active high, activates external
PA when TX_PD=0)
1001 : Not used
1010 : Not used
1011 : Not used
1100 : Not used
1101 : Not used
1110 : N_DIVIDER Output
1111 : F_COMP
LOCK[3]
PLL_LOCK_
0
ACCURACY
LOCK[2]
PLL_LOCK_
0
LENGTH
LOCK[1]
LOCK_INSTANT
-
LOCK[0] LOCK_CONTINUOUS
-
-
0 : Sets Lock Threshold = 127, Reset Lock
Threshold = 111. Corresponds to a worst case
accuracy of 0.7%
1 : Sets Lock Threshold = 31, Reset Lock
Threshold =15. Corresponds to a worst case
accuracy of 2.8%
-
0 : Normal PLL lock window
1 : Not used
-
Status bit from Lock Detector
-
Status bit from Lock Detector
CAL Register (0Eh)
REGISTER
CAL[7]
NAME
CAL_START
CAL[6]
CAL[5]
CAL_DUAL
CAL_WAIT
CAL[4]
CAL[3]
CAL[2:0]
CAL_CURRENT
CAL_COMPLETE
CAL_ITERATE
Default
value
0
0
0
0
0
101
Active Description
↑ ↑ 1 : Calibration started
0 : Calibration inactive
CAL_START must be set to 0 after
calibration is done
H 1 : Store calibration in both A and B
0 : Store calibration in A or B defined by
MAIN[6]
H 1 : Normal Calibration Wait Time
0 : Half Calibration Wait Time
The calibration time is proportional to the
internal reference frequency. 2 MHz
reference frequency gives 14 ms wait time.
H 1 : Calibration Current Doubled
0 : Normal Calibration Current
H Status bit defining that calibration is
complete
H Iteration start value for calibration DAC
000 - 101: Not used
110 : Normal start value
111 : Not used
SWRS044
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