Semtech LR1110 - LR1110 PA Configuration Commands

LR1110
User Manual Rev.1.0
UM.LR1110.W.APP March 2020
82 of 130
Semtech
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9.5 Commands
9.5.1 SetPaConfig
The command SetPaConfig( ) selects which PA to use and configures the supply of this PA.
• PaSel= 0x00 selects the Low Power PA. PaSel= 0x01 selects the High Power PA.
• RegPaSupply= 0x00 powers the PA from the internal regulator. RegPaSupply= 0x01 powers the PA from VBAT. The user
must use RegPaSupply = 0x01 whenever TxPower > 14.
• PaDutyCycle controls the duty cycle of the High Power PA and Low Power PA.
• PaHPSel controls the size of the High Power PA.
9.5.2 SetTxParams
The command SetTxParams( ) allows setting the Tx Power and the Ramp Time of the selected PA. SetPaConfig( ) must be sent
prior to this command.
• TxPower defines the output power in dBm in a range of
 - 17 dBm (0xEF) to +14 dBm (0x0E) by step of 1 dB if the High Efficiency PA is selected
Table 9-3: SetPaConfig Command
Byte 0 1 2 3 4 5
Data from Host 0x02 0x15 PaSel RegPaSupply PaDutyCycle PaHPSel
Data to Host Stat1 Stat2
IrqStatus
(31:24)
IrqStatus
(23:16)
IrqStatus
(15:8)
IrqStatus
(7:0)
Table 9-4: DutyCycle Parameter
Low Power PA High Power PA
Control DutyCycle = 20% + 4%*PaDutyCycle
Allowed Range
20%<DutyCycle<48%
0<PaDutyCycle<7
20%<DutyCycle<36%
0<PaDutyCycle<6
Default value
DutyCycle=36%
PaDutyCycle=4
Table 9-5: SetTxParams Command
Byte 0 1 2 3
Data from Host 0x02 0x11 TxPower RampTime
Data to Host Stat1 Stat2 IrqStatus(31:24) IrqStatus(23:16)