RM0453 Rev 1 185/1461
RM0453 Sub-GHz radio (SUBGHZ)
218
PA optimal settings given in the table below must be used to maximize the PA efficiency for
the maximum targeted output power. Matching network determination must be done using
these settings (see the application note AN5457 for more details).
Set_TxRxFallbackMode() command
Set_TxRxFallbackMode(FallbackMode) defines the operating mode to enter after a
successful packet transmission or packet reception.
byte 2 bits 2:0 HpMax[2:0]: HP PA output power (see Table 35 for settings)
bits 7:3 Reserved, must be kept at reset value.
byte 3 bits 7:1 Reserved, must be kept at reset value.
bit 0 PaSel: PA selection.
0: HP PA selected
1: LP PA selected (default)
byte 4 bits 7:0 0x01
Table 35. PA optimal setting and operating modes
Output power
(dBm)
PA mode
Set_PaConfig() Set_TxParams()
PaDutyCycle
[2:0]
HpMax[2:0] PaSel Power
+ 15
LP
0x6 0x0 1 0x0E
+ 14 0x4 0x0 1 0x0E
+ 10 0x1 0x0 1 0x0D
+ 22
HP
0x4 0x7 0 0x16
+ 20 0x3 0x5 0 0x16
+ 17 0x2 0x3 0 0x16
+ 14 0x2 0x2 0 0x16
01
Opcode FallbackMode[7:0]
ww
byte 0 bits 7:0 Opcode: 0x93
byte 1 bits 7:0 FallbackMode[7:0]: Fall-back mode after successful packet transmission or
packet reception
0x20: Standby mode entry (default)
0x30: Standby with HSE32 enabled mode entry
0x40: FS mode entry
Others: reserved
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