UG250: Thunderboard Sense User's Guide
The Thunderboardâ„¢ Sense is the ultimate multi-sensor, multi-
protocol cloud inspiration kit.
The board is a small and cost ef
fective, feature rich, prototype and development plat-
form based on the EFR32â„¢ Mighty Gecko Wireless System-on-Chip. The Thunder-
board Sense is an ideal platform for developing energy-friendly connected IoT devices.
This is a true multi-protocol capable kit, supporting proprietary stacks and standard pro-
tocols such as Zigbee, Thread and Bluetooth® low energy.
The Thunderboard Sense ships with a ready to use Bluetooth demo that works with a
cloud connected smartphone app, showcasing easy collection of environmental and
motion sensor data.
A built in SEGGER J-Link debugger ensures easy customization and development.
KEY POINTS
• EFR32 Mighty Gecko Wireless SoC
•
Fine grained power-control for ultra low
power operation
• 2.4 GHz ceramic chip antenna
• Six sensors and four high brightness
controllable RGB LEDs
• User LEDs/pushbuttons
• 8-Mbit Flash for OTA programming
• SEGGER J-Link on-board debugger
• Virtual COM Port
• Mini Simplicity connector for AEM and
packet trace using external Silicon Labs
debugger
• 20-pin 2.54 mm breakout pads
• Power sources include USB, coin cell and
external batteries
ON-BOARD SENSORS
• Relative humidity and temperature sensor
•
UV index and ambient light sensor
• Indoor air quality gas sensor
• 6-axis inertial sensor
• Barometric pressure sensor
• MEMS microphone
SOFTWARE SUPPORT
• Simplicity Studio™
•
Energy Profiler
• Network Analyzer
silabs.com | Building a more connected world. Rev. 1.1
Not Recommended for New Designs
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
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Not Recommended for New Designs