Data Sheet

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WGM160P pin description
silabs.com | Building a more connected world. Rev. 0.1 | 4
3.2 Power pin
The WGM160P module is supplied through VBAT pin. There is no need for external bypass capacitors as ICs decoupling is performed
within the module. Note that although VBAT supply is variable, the maximum TX output power can be achieved only when supply is set
to 3.3V or above.
Note that pin VBUS cannot be used to supply the module.
3.3 RESETn pin
WGM160P module is reset by driving the RESETn pin low. A weak internal pull-up resistor holds the RESETn pin high, allowing it to be
left unconnected if no external reset source is required.
Note that when WGM160P is not powered, RESETn must not be connected to an active supply through an external pull-up resistor as
this could damage the device.
Note also that WGM160P features Power On Reset to keep WGM160P in reset mode until VBAT is high enough. For more details, refer
to MCU EFM32GG11 reference manual.
3.4 RF pins
The WGM160P module is available with 2 RF configurations.
Table 3.2 WGM160P RF Configuration
Part numbers
RF1
RF2
WGM160PX22KGA2
WGM160P022KGA2
Internal antenna.
Pin RF1 is not connected.
RF port
WGM160PX22KGN2
WGM160P022KGN2
RF port
RF port
RF ports are internally matched to 50 Ohms. It is recommended to connect any unused RF port to ground through a 50 Ohms resistor.
Any of the RF ports can be used in a similar way. However, performance obtained on RF1 is slightly better, so it is preferable to use this
one.
Only one RF port is active at a given time, but the module can also achieve antenna diversity if the application requires it. Port selection
and antenna diversity enablement are achieved through software configuration.
3.5 Clocks
The WGM160P module is available with 2 clock configurations.
Table 3.3 WGM160P Low Power Clock Configuration
Part numbers
Low Frequency Crystal
WGM160PX22KGA2
WGM160PX22KGN2
Internal 32.768kHz crystal
WGM160P022KGA2
WGM160P022KGN2
No crystal
A 32.768kHz clock source is required to enable the lowest power operation in WiFi power save modes. 32.768kHz can be generated
either using internal Low Frequency RC oscillator or using internal crystal. As the frequency tolerance of this clock affects wake-up
scheduling, power consumption in DTIM modes is optimized when using WGM160P with integrated 32.768kHz crystal.