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SWRS046H – NOVEMBER 2006 – REVISED MARCH 2015
Table 5-39. LOCK Register (15h)
(1)
DEFAULT
REGISTER
NAME
ACTIVE
DESCRIPTION
VALUE
LOCK[7:4]
LOCK_SELECT[3:0]
0
—
Selection of signals to LOCK pin
0: Set to 0
1: Set to 1
2: LOCK_CONTINUOUS (active low)
3: LOCK_INSTANT (active low)
4: CARRIER_SENSE (RSSI above threshold, active low)
5: CAL_COMPLETE (active low)
6: SEQ_ERROR (active low)
7: FXOSC
8: REF_CLK
9: FILTER_CLK
10: DEC_CLK
11: PRE_CLK
12: DS_CLK
13: MODEM_CLK
14: VCO_CAL_COMP
15: F_COMP
LOCK[3]
WINDOW_WIDTH
0
—
Selects lock window width
0: Lock window is 2 prescaler clock cycles wide
1: Lock window is 4 prescaler clock cycles wide
Recommended setting: WINDOW_WIDTH=0.
LOCK[2]
LOCK_MODE
0
—
Selects lock detector mode
0: Counter restart mode
1: Up/Down counter mode
Recommended setting: LOCK_MODE=0.
LOCK[1:0]
LOCK_ACCURACY[1:0]
0
—
Selects lock accuracy (counter threshold values)
0: Declare lock at counter value 127, out of lock at value 111
1: Declare lock at counter value 255, out of lock at value 239
2: Declare lock at counter value 511, out of lock at value 495
3: Declare lock at counter value 1023, out of lock at value 1007
(1)
Set LOCK_SELECT=2 to use the LOCK pin as a lock indicator.
Copyright © 2006–2015, Texas Instruments Incorporated
Detailed Description
73
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