Commands; Setpaconfig; Table 9-4: Setpaconfig Command; Table 9-5: Dutycycle Parameters - Semtech LR1121 User Manual

9.5 Commands

9.5.1 SetPaConfig

Command SetPaConfig(...) selects which PA to use and configures the supply of this PA.

Table 9-4: SetPaConfig Command

Byte 0
Data from Host 0x02
Data to Host Stat1
• PaSel selects the PA:
0x00: Selects the low power PA

0x01: Selects the high power PA

0x02: Selects the high frequency PA

• RegPaSupply selects the PA power source:
0x00: Powers the PA from the internal regulator

0x01: Powers the PA from VBAT. The user must use RegPaSupply = 0x01 whenever TxPower > 14

• PaDutyCycle controls the duty cycle of each PA

Table 9-5: DutyCycle Parameters

For frequency < 400MHz, PaDutyCycle ≤ 0x06
Allowed
Range
For frequency ≥ 400MHz, PaDutyCycle ≤ 0x03
Default
value
•
PaHPSel controls the size of the high power PA.
LR1121
User Manual Rev 1.1
UM.LR1121.W.APP Mar 2023
1
0x15
Stat2
Low Power PA
www.semtech.com
2 3
PaSel RegPaSupply
IrqStatus IrqStatus
(31:24) (23:16)
High Power PA
At PaHpSel ≥ 0x04, PaDutyCycle ≤ 0x03
PaDutyCycle = 0x04
4 5
PaDutyCycle PaHPSel
IrqStatus IrqStatus
(15:8) (7:0)
High Frequency PA
0 ≤ PaDutyCycle ≤ 0x07
99 of 130
Semtech
Proprietary & Confidential