CC1000
SWRS048A Page 43 of 55
LOCK Register (0Dh)
REGISTE
R
NAME Default
value
Active Description
LOCK[7:4] LOCK_SELECT[3:0] 0000 - 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 : IF_OUT
0111 : REFERENCE_DIVIDER Output
1000 : TX_PDB (active high, activates external PA
when TX_PD=0)
1001 : Manchester Violation (active high)
1010 : RX_PDB (active high, activates external
LNA when RX_PD=0)
1011 : Not defined
1100 : Not defined
1101 : LOCK_AVG_FILTER
1110 : N_DIVIDER Output
1111 : F_COMP
LOCK[3] PLL_LOCK_
ACCURACY
0 - 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%
LOCK[2] PLL_LOCK_
LENGTH
0 -
0 : Normal PLL lock window
1 : Not used
LOCK[1] LOCK_INSTANT - - Status bit from Lock Detector
LOCK[0] LOCK_CONTINUOUS - - Status bit from Lock Detector
CAL Register (0Eh)
REGISTER NAME Default
value
Active Description
CAL[7] CAL_START 0
↑ ↑ 1 : Calibration started
0 : Calibration inactive
CAL_START must be set to 0 after
calibration is done
CAL[6] CAL_DUAL 0 H 1 : Store calibration in both A and B
0 : Store calibration in A or B defined by
MAIN[6]
CAL[5] CAL_WAIT 0 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.
CAL[4] CAL_CURRENT 0 H 1 : Calibration Current Doubled
0 : Normal Calibration Current
CAL[3] CAL_COMPLETE 0 H Status bit defining that calibration is
complete
CAL[2:0] CAL_ITERATE 101 H Iteration start value for calibration DAC
000 – 101: Not used
110 : Normal start value
111 : Not used
