Data Sheet
Page 103
RFM95/96/97/98
Te l : + 8 6 - 7 5 5 - 8 2 9 7 3 8 0 5 Fa x : + 8 6 - 7 5 5 - 8 2 9 7 3 5 5 0 E- m a i l : sa l e s @ h o p e r f . c o m h t t p : / / w w w . h o p e r f . c o m
WIRELESS & SENSING PRELIMINARY DATASHEET
Name
(Address)
Bits
Variable Name
Mode
Reset
LoRa
TM
Description
RegFrLsb
(0x08)
7-0
Frf(7:0)
rwt
0x00
LSB of RF carrier frequency
f =
----
(
--
X
----
O
-----
S
---
C
----
)
---
·
---
F
----
r
---
f
RF
2
19
Resolution is 61.035 Hz if F(XOSC) = 32 MHz. Default value is
0x6c8000 = 434 MHz. Register values must be modified only
when device is in SLEEP or STAND-BY mode.
Registers for RF blocks
7
PaSelect
rw
0x00
Selects PA output pin
0 RFO pin. Output power is limited to +14 dBm.
1 PA_BOOST pin. Output power is limited to +20 dBm
6-4 MaxPower rw 0x04 Select max output power: Pmax=10.8+0.6*MaxPower [dBm]
RegPaConfig
(0x09)
3-0
OutputPower
rw
0x0f
Pout=Pmax-(15-OutputPower) if PaSelect = 0 (RFO pin)
Pout=17-(15-OutputPower) if PaSelect = 1 (PA_BOOST pin)
7-5 unused r - unused
4 reserved rw 0x00 reserved
RegPaRamp
(0x0A)
3-0
PaRamp(3:0)
rw
0x09
Rise/Fall time of ramp up/down in FSK
0000 3.4 ms
0001 2 ms
0010 1 ms
0011 500 us
0100 250 us
0101 125 us
0110 100 us
0111 62 us
1000 50 us
1001 40 us
1010 31 us
1011 25 us
1100 20 us
1101 15 us
1110 12 us
1111 10 us
7-6 unused r 0x00 unused
5
OcpOn
rw
0x01
Enables overload current protection (OCP) for PA:
0 OCP disabled
1 OCP enabled
RegOcp
(0x0B
4-0
OcpTrim
rw
0x0b
Trimming of OCP current:
Imax = 45+5*OcpTrim [mA] if OcpTrim <= 15 (120 mA) /
I
max = -30+10*OcpTrim [mA] if 15 < OcpTrim <= 27 (130 to
240 mA)
I
max = 240mA for higher settings
Default I
max = 100mA