RFM95 Datasheet, PDF (90/121 Pages) List of Unclassifed Manufacturers – Low Power Long Range Transceiver Module

WIRELESS & SENSING
RFM95/96/97/98(W)
PRELIMINARY
DATASHEET
Name
(Address)
Bits
7
6
RegRxConfig
(0x0d)
5
4
3
2-0
7-3
RegRssiConfig
(0x0e)
2-0
RegRssiCollision
(0x0f)
7-0
RegRssiThresh
(0x10)
7-0
RegRssiValue
(0x11)
7-0
7
6-5
4-3
RegRxBw
(0x12)
2-0
Variable Name
RestartRxOnCollision
RestartRxWithoutPllLock
RestartRxWithPllLock
AfcAutoOn
AgcAutoOn
RxTrigger
RssiOffset
RssiSmoothing
RssiCollisionThreshold
RssiThreshold
RssiValue
unused
reserved
RxBwMant
RxBwExp
Mode
Default
value
FSK/OOK Description
Turns on the mechanism restarting the receiver automatically if it
rw
0x00
gets saturated or a packet collision is detected
0 Æ No automatic Restart
1 Æ Automatic restart On
Triggers a manual Restart of the Receiver chain when set to 1.
wt 0x00 Use this bit when there is no frequency change,
RestartRxWithPllLock otherwise.
Triggers a manual Restart of the Receiver chain when set to 1.
wt 0x00 Use this bit when there is a frequency change, requiring some
time for the PLL to re-lock.
rw
0x00
0 Æ No AFC performed at receiver startup
1 Æ AFC is performed at each receiver startup
rw
0x01
0 Æ LNA gain forced by the LnaGain Setting
1 Æ LNA gain is controlled by the AGC
rw
0x06 Selects the event triggering AGC and/or AFC at receiver startup.
* See Table 18 for a description.
Signed RSSI offset, to compensate for the possible losses/gains
rw 0x00 in the front-end (LNA, SAW filter...)
1dB / LSB, 2’s complement format
Defines the number of samples taken to average the RSSI result:
000 Æ 2 samples used
001 Æ 4 samples used
010 Æ 8 samples used
rw 0x02 011 Æ 16 samples used
100 Æ 32 samples used
101 Æ 64 samples used
110 Æ 128 samples used
111 Æ 256 samples used
Sets the threshold used to consider that an interferer is detected,
rw 0x0a witnessing a packet collision. 1dB/LSB (only RSSI increase)
Default: 10dB
rw
0xff
RSSI trigger level for the Rssi interrupt:
- RssiThreshold / 2 [dBm]
r
-
Absolute value of the RSSI in dBm, 0.5dB steps.
RSSI = - RssiValue/2 [dBm]
r
- unused
rw 0x00 reserved
Channel filter bandwidth control:
rw 0x02 00 Æ RxBwMant = 16
10 Æ RxBwMant = 24
01 Æ RxBwMant = 20
11 Æ reserved
Channel filter bandwidth control:
FSK Mode:
rw 0x05
RxB w
=
------------------------^F----^X----^O----^S----^C-------------------------
RxBwMant × 2^{RxBwExp + 2}
Page 90
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