RFM22 Datasheet, PDF (99/150 Pages) –

RFM22
Register 22h. Clock Recovery Offset 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
ncoff[15:8]
Type
R/W
Reset value =01000111
Bit
Name
7:0
ncoff[15:8]
NCO Offset.
See formula above
Function
Register 23h. Clock Recovery Offset 0
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
ncoff[7:0]
Type
R/W
Reset value = 10101110
Bit
Name
7:0
ncoff[7:0]
NCO Offset.
See formula above
Function
The loop gain can be calculated as crgain = 2¹⁶ / (rxosr x h x P), where the modulation index h = 2 x FD / RX_DR.
Register 24h. Clock Recovery Timing Loop Gain 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
crgain[10:8]
Type
R/W
R/W
Reset value = 00000010
Bit
Name
Function
7:3
Reserved Reserved.
2:0
crgain[10:8] Clock Recovery Timing Loop Gain.
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