Silicon Laboratories Si106 Series, User Manual

S i 1 0 6 x - D K

8

Rev. 0.2

6.1.  The Wireless Motherboard 

Figure 3. Wireless Motherboard

The wireless motherboard contains four pushbuttons, four LEDs, and a buzzer, which function as simple user
interfaces. A graphical LCD displays menu items for range testing purposes, and a potentiometer demonstrates
the analog capabilities of the MCU. A switch supports the power options of the MCU’s built-in dc/dc converter.
Using the current measurement jumpers, current consumption can be measured separately either for the MCU, the
radio, or the peripherals. The motherboard contains test pins for all I/O pins of the MCU and for all digital pins of the
radio. In addition, there are SMA connectors for the GPIOs of the radio for connection of test equipment. A USB
communication interface as well as a built-in Silicon Labs USB-to-C2 debug adapter are integrated onto the board
so that the wireless motherboard (WMB) can be directly connected via USB to the PC for downloading and
debugging code on the MCU. There is also an interface connection for sensor modules. The MCU is also
connected to the RF pico board through a connector pair.

MCU Pico Board

RF Pico Board

Current 
Measurement 
Pins

Radio 
Test 
Pins

Radio GPIO 
Connectors

Buzzer

Reset Button

Push Buttons

Potentiometer

MCU DC/DC 

Converter 

Switch

MCU Test 

Pins

Power 

Supply 

Switch

Sensor 

Module 

Connector

External 

Power 

Supply 

Connection

USB 

Communication 

and Debug 

Interface