Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual page 224

10.3.4.2 Power Configuration 1: No DC-DC
In Power Configuration 1, the DC-DC converter is programmed in Off mode and the Bypass switch is Off. The DVDD pin must be pow-
ered externally - typically, DVDD is connected to the main supply. DVDD powers the internal Digital LDO (i.e., REGPWRSEL=1) which
powers the digital circuits. IOVDD and AVDD are powered from the main supply as well. RFVDD and PAVDD, which power the radio,
are shorted to the main supply as well.
VREGSW must be left disconnected in this configuration.
V
DD
Main
+
Supply
–
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VREGVDD
VREGVDD
Bypass
Switch
OFF
DC-DC
Driver
VREGSW
VREGSW
DC-DC
VREGVSS
VREGVSS
DVDD
DVDD
1
Digital Digital
Logic LDO
DECOUPLE
DECOUPLE
Figure 10.3. DC-DC Off Power Configuration
EMU - Energy Management Unit
AVDD
IOVDD
IOVDD
AVDD
FLASH
0
1
ANASW
Analog
Blocks
0
REGPWRSEL
RF
RF
Power
Analog
Amplifier
RFVDD PAVDD
Reference Manual
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