User's Manual

2. Pinout
This section describes the pinout of the WGM110 Module.
Pads in the middle of the Module are intended for ground connections and for RF test and production programming, while pads on the
Module edges consist of general purpose input/output, power supply voltage input, ground, and reset signal connections.
Figure 2.1. WGM110 Pinout (Top View)
2.1 Power, Ground and Reset Pads
The table below lists the power, ground, and reset pads of the WGM110 Module.
Table 2.1. WGM110 Power, Ground, and Reset Pads
Pad number Function Description
38, 51 VDDCPU Processor core and peripheral interface power supply.
39 VDDPA RF power amplifier and Wi-Fi core power supply
1, 16, 25, 40,
42, 44, 46,
48
GND Ground.
All ground pads are connected together internally.
Connect ground pads directly to a solid ground plane with maximum number of vias in close proximity to
pads especially at the antenna end.
These ground pads also act as thermal paths which should be used to conduct heat from the module to the
PCB.
Do not use thermal reliefs on ground pads.
24 VBUS USB VBUS detect input is used to detect the presence of an external USB port bus voltage.
When USB is not used connect VBUS to VDDCPU.
37 RESETn Reset signal input. To reset the Module pull this line low.
The reset signals resets both the MCU and the Wi-Fi radio.
Connected to an internal pull-up, can be left floating if not needed.
WGM110 Wizard Gecko Wi-Fi
®
Module Data Sheet
Pinout
silabs.com | Smart. Connected. Energy-friendly. Rev. 1.2 | 2