Data Sheet

CC1101
SWRS061B Page 75 of 93
0x19: FOCCFG – Frequency Offset Compensation Configuration
Bit Field Name Reset R/W Description
7:6 Reserved R0
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.