CC2500RGPR Datasheet, PDF (73/99 Pages) Texas Instruments – Low-Cost Low-Power 2.4 GHz RF Transceiver

CC2500
0x19: FOCCFG – Frequency Offset Compensation Configuration
Bit Field Name
Reset R/W Description
7:6 Reserved
5 FOC_BS_CS_GATE
4:3 FOC_PRE_K[1:0]
2 FOC_POST_K
1:0 FOC_LIMIT[1:0]
1
2 (10)
1
2 (10)
R0
R/W If set, the demodulator freezes the frequency offset
compensation and clock recovery feedback loops until the
CARRIER_SENSE signal goes high.
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
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
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) ±BWCHAN/8
2 (10) ±BWCHAN/4
3 (11) ±BWCHAN/2
Frequency offset compensation is not supported for OOK;
Always use FOC_LIMIT=0 with this modulation format.
SWRS040C
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