Data Sheet

Page 100
RFM95/96/97/98(W)
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WIRELESS & SENSING PRELIMINARY DATASHEET
Name
(Address)
Bits
Variable Name
Mode
Default
value
FSK/OOK Description
7-6 unused r - unused
RegAgcRef
(0x61)
5-0 AgcReferenceLevel rw 0x19
Sets the floor reference for all AGC thresholds:
AGC Reference[dBm]=
-174dBm+10*log(2*RxBw)+SNR+AgcReferenceLevel
SNR = 8dB, fixed value
7-5 unused r - unused
RegAgcThresh1
(0x62)
4-0 AgcStep1 rw 0x0c Defines the 1st AGC Threshold
7-4 AgcStep2 rw 0x04 Defines the 2nd AGC Threshold:
RegAgcThresh2
(0x63)
3-0 AgcStep3 rw 0x0b Defines the 3rd AGC Threshold:
7-4 AgcStep4 rw 0x0c Defines the 4th AGC Threshold:
RegAgcThresh3
(0x64)
3-0 AgcStep5 rw 0x0c Defines the 5th AGC Threshold:
6.3. Band Specific Additional Registers
The registers in the address space from 0x61 to 0x73 are specific for operation in the lower frequency bands (below 525
MHz), or in the upper frequency bands (above 860 MHz). Their programmed value may differ, and are retained when
switching from lower to high frequency and vice-versa. The access to the band specific registers is granted by enabling or
disabling the bit 3 LowFrequencyModeOn of the RegOpMode register. By default, the bit LowFrequencyModeOn is at ‘1’
indicating that the registers are configured for the low frequency band.
Table 87 Low Frequency Additional Registers
Name
(Address)
Bits
Variable Name
Mode
Default
value
Low Frequency Additional Registers
7-6 unused r - unused
RegAgcRefLf
(0x61)
5-0 AgcReferenceLevel rw 0x19
Sets the floor reference for all AGC thresholds:
AGC Reference[dBm]=
-174dBm+10*log(2*RxBw)+SNR+AgcReferenceLevel
SNR = 8dB, fixed value
7-5 unused r - unused
RegAgcThresh1Lf
(0x62)
4-0 AgcStep1 rw 0x0c Defines the 1st AGC Threshold
7-4 AgcStep2 rw 0x04 Defines the 2nd AGC Threshold:
RegAgcThresh2Lf
(0x63)
3-0 AgcStep3 rw 0x0b Defines the 3rd AGC Threshold:
7-4 AgcStep4 rw 0x0c Defines the 4th AGC Threshold:
RegAgcThresh3Lf
(0x64)
3-0 AgcStep5 rw 0x0c Defines the 5th AGC Threshold:
7-6 PllBandwidth rw 0x03
Controls the PLL bandwidth:
00 Æ 75 kHz 10 Æ 225 kHz
01 Æ 150 kHz 11 Æ 300 kHz
RegPllLf
(0x70)
5-0 reserved rw 0x10 reserved. Retain default value