Figure 17. Schematic Focus On The Rf Part; Figure 18. Hp Configuration Without Dc Switches; Figure 19. Lp Configuration Without Dc Switches - ST STM32WL Series User Manual

The two DC switches U1 and U5 are used to realize various output power operation modes.
DC switches
Three output power modes are available:
1. HP: High‑power mode only
In this case, R13 and R14 are ON, while R12, R15, U1, and U5 are OFF.
2. LP: Low‑power mode only
In this case, R13 and R14 are OFF, while R12 and R15 are ON, and U1 and U5 are OFF.
UM3127 - Rev 1
Figure 17. Schematic focus on the RF part
STM32WL5MOC module
Figure 18. HP configuration without DC switches
VDDRF VDDPA VDDRF1V55 RFO_HP
SRM32WL5MOC module
n GPIOs VDD
Figure 19. LP configuration without DC switches
VDDRF VDDPA VDDRF1V55 RFO_HP
SRM32WL5MOC module
n GPIOs VDD
Hardware layout and configuration
Antenna filter
(not needed)
VR_PA RFO_LP
Antenna
GND
VR_PA RFO_LP
Antenna
GND
UM3127
SMA connector
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