Specifications

CC1101
SWRS061I Page 83 of 98
0x19: FOCCFG – Frequency Offset Compensation Configuration
Bit
Field Name
Reset
R/W
Description
7:6
R0
Not used
5
FOC_BS_CS_GATE
1
R/W
If set, the demodulator freezes the frequency offset compensation and clock
recovery feedback loops until the CS signal goes high.
4:3
FOC_PRE_K[1:0]
2 (10)
R/W
The frequency compensation loop gain to be used before a sync word is
detected.
Setting
Freq. compensation loop gain before sync word
0 (00)
K
1 (01)
2K
2 (10)
3K
3 (11)
4K
2
FOC_POST_K
1
R/W
The frequency compensation loop gain to be used after a sync word is detected.
Setting
Freq. compensation loop gain after sync word
0
Same as FOC_PRE_K
1
K/2
1:0
FOC_LIMIT[1:0]
2 (10)
R/W
The saturation point for the frequency offset compensation algorithm:
Setting
Saturation point (max compensated offset)
0 (00)
±0 (no frequency offset compensation)
1 (01)
±BW
CHAN
/8
2 (10)
±BW
CHAN
/4
3 (11)
±BW
CHAN
/2
Frequency offset compensation is not supported for ASK/OOK. Always use
FOC_LIMIT=0 with these modulation formats.