Table of Contents
1.
Introduction ................................4
1.1 Kit Contents ..............................5
1.2 Hardware Content ............................5
1.3 Kit Hardware Layout............................5
2. Specifications ...............................6
2.1 Absolute Maximum Ratings .........................6
2.2 Recommended Operating Conditions ......................6
2.3 Current Consumption ...........................7
3. Hardware .................................9
3.1 Block Diagram..............................9
3.2 Power Supply ..............................10
3.3 EFR32 Reset ..............................11
3.4 Peripheral Power Domains .........................11
3.5 Sensors ................................11
3.5.1 Si7021 Relative Humidity and Temperature Sensor ...............12
3.5.2 Si1133 UV Index and Ambient Light Sensor ..................13
3.5.3 BMP280 Barometric Pressure Sensor ....................14
3.5.4 CCS811 Indoor Air Quality Gas Sensor ...................15
3.5.5 ICM-20648 6-Axis Inertial Sensor .....................16
3.5.6 SPV1840 MEMS Microphone ......................17
3.6 LEDs .................................18
3.6.1 RGB LEDs .............................18
3.6.2 Low power red/green LED........................19
3.7 Push Buttons ..............................19
3.8 Memory ................................19
3.9 On-board Debugger ............................20
3.10 Connectors ..............................20
3.10.1 Breakout Pads ...........................21
3.10.2 Mini Simplicity Connector .......................22
3.10.3 USB Micro-B Connector ........................22
3.10.4 Battery Connector ..........................22
4. Debugging ............................... 23
4.1 On-board Debugger ............................23
4.2 Virtual COM Port .............................24
4.3 Mini Simplicity Connector ..........................24
5. Power and Interrupt Controller ........................ 25
5.1 Communication .............................25
5.2 Register Map ..............................26
silabs.com | Building a more connected world. Rev. 1.1 | 2
Not Recommended for New Designs