SX1276 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SX1276' PDF : 132 Pages View PDF
WIRELESS, SENSING & TIMING
SX1276/77/78/79
DATASHEET
Name
(Address)
RegFrMid
(0x07)
RegFrLsb
(0x08)
RegPaConfig
(0x09)
RegPaRamp
(0x0A)
RegOcp
(0x0B
Bits
Variable Name
7-0 Frf(15:8)
7-0 Frf(7:0)
7
PaSelect
6-4 MaxPower
3-0 OutputPower
7-5 unused
4
reserved
3-0 PaRamp(3:0)
7-6 unused
5
OcpOn
4-0 OcpTrim
Mode Reset
LoRaTM Description
rw 0x80 MSB of RF carrier frequency
LSB of RF carrier frequency
rwt 0x00
fRF = F----(--X----O-----S2---C1--9--)---⋅---F----r---f
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
Selects PA output pin
rw 0x00 0 RFO pin. Output power is limited to +14 dBm.
1 PA_BOOST pin. Output power is limited to +20 dBm
rw 0x04 Select max output power: Pmax=10.8+0.6*MaxPower [dBm]
rw
0x0f
Pout=Pmax-(15-OutputPower) if PaSelect = 0 (RFO pin)
Pout=17-(15-OutputPower) if PaSelect = 1 (PA_BOOST pin)
r
-
unused
rw 0x00 reserved
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
rw 0x09 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
r
0x00 unused
Enables overload current protection (OCP) for PA:
rw 0x01 0 OCP disabled
1 OCP enabled
Trimming of OCP current:
Imax = 45+5*OcpTrim [mA] if OcpTrim <= 15 (120 mA) /
rw
0x0b
Imax = -30+10*OcpTrim [mA] if 15 < OcpTrim <= 27 (130 to
240 mA)
Imax = 240mA for higher settings
Default Imax = 100mA
Rev. 4 - March 2015
©2015 Semtech Corporation
Page 109
www.semtech.com
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