Silicon Laboratories Thunderboard EFM8UB3 User Manual
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Silicon Laboratories Thunderboard EFM8UB3 User Manual

Silicon Laboratories Thunderboard EFM8UB3 User Manual

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UG308: Thunderboard EFM8UB3 User's
Guide
The Thunderboard EFM8UB3 is a low cost, small form factor de-
velopment and evaluation platform for the EFM8™ Universal Bee
Microcontroller.
The Thunderboard contains an EFM8UB3 MCU together with an on-board SEGGER J-
Link debugger for easy debugging through the USB Micro-B debugging connector. All of
the EFM8 I/Os are routed to breakout pads on the sides of the board making it easy to
expand on the board features and evaluate the EFM8 Universal Bee's features with cus-
tom hardware.
silabs.com | Building a more connected world.
TARGET DEVICE
• EFM8 Universal Bee Microcontroller
(EFM8UB31F40G-A-QFN24)
• Pipelined 8-bit C8051 core with 48 MHz
maximum operating frequency
• 40 kB flash memory and 3328 bytes RAM
• USB feature set
KIT FEATURES
• USB connectivity
• SEGGER J-Link on-board debugger
• Virtual COM port
• User RGB LED and pushbuttons
• 2.54 mm breakout pads to EFM8
• Flat flexible cable connector for external
Silicon Labs "postage-stamp" sized
boards
• Optional Mini-Simplicity connector for
Advanced Energy Monitoring using
external Silicon Labs debugger
SOFTWARE SUPPORT
• Simplicity Studio™
Rev. 1.0

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Summary of Contents for Silicon Laboratories Thunderboard EFM8UB3

  • Page 1 UG308: Thunderboard EFM8UB3 User's Guide The Thunderboard EFM8UB3 is a low cost, small form factor de- velopment and evaluation platform for the EFM8™ Universal Bee TARGET DEVICE Microcontroller. • EFM8 Universal Bee Microcontroller (EFM8UB31F40G-A-QFN24) The Thunderboard contains an EFM8UB3 MCU together with an on-board SEGGER J- •...

  • Page 2: Table Of Contents

    Table of Contents 1. Introduction ....... . 3 1.1 Kit Contents .

  • Page 3: Introduction

    • 1x Thunderboard EFM8UB3 board (BRD5002A) • 1x Micro USB 2.0 to USB A male cable 1.2 Getting Started Detailed instructions for how to get started with your new Thunderboard EFM8UB3 can be found on the Silicon Labs web pages: http://www.silabs.com/start-efm8 1.3 Kit Hardware Layout The layout of the Thunderboard EFM8UB3 is shown below.

  • Page 4: Electrical Specifications

    UG308: Thunderboard EFM8UB3 User's Guide Electrical Specifications 2. Electrical Specifications 2.1 Absolute Maximum Ratings Parameter Condition Max Unit Input voltage on EFM8 USB connector -0.3 +5.8 V Input voltage on debug USB connector +5.5 V Output current Power-Source switch = EFM8 USB...

  • Page 5: Hardware

    UG308: Thunderboard EFM8UB3 User's Guide Hardware 3. Hardware 3.1 Block Diagram An overview of the Thunderboard EFM8UB3 is illustrated in the figure below. EFM8 USB VBUS User Buttons USB Micro-B & RGB LED Connector Breakout Pads (EXP-Header pinout) Power Flat Flexible...

  • Page 6: Power Supply

    UG308: Thunderboard EFM8UB3 User's Guide Hardware 3.2 Power Supply The EFM8 on the kit can be bus-powered, using its internal 5V-to-3.3 V regulator to provide power to itself and the VMCU net, or the EFM8 can be self-powered with its internal regulator disabled. In self-powered mode, the EFM8 and the VMCU net are powered by an on-board low-dropout regulator.

  • Page 7: Universal Serial Bus

    3.3 Universal Serial Bus The Thunderboard EFM8UB3 board is equipped with a USB Micro-B connector interfacing with the EFM8's USB peripheral. The figure below shows how the USB lines are connected to the MCU. Note that the figure shows the bus-powered configuration, applicable when the "Power Source"...

  • Page 8: On-Board Debugger

    3.5 On-board Debugger The Thunderboard EFM8UB3 contains a microcontroller separate from the EFM8 Universal Bee that provides the user with a on-board J-Link debugger through the USB micro-B debugging port. This microcontroller is referred to as the "On-board Debugger", and is not programmable by the user.

  • Page 9: Connectors

    3.7 Connectors Featured on the Thunderboard EFM8UB3 is a Mini Simplicity connector, two USB Micro-B connectors, a ribbon connector, and 24 breakout pads. Of the breakout pads, 20 follow the Silicon Labs EXP header pinout that provides a fixed feature set across Silicon Labs starter kits.

  • Page 10: Breakout Pads

    The pin-routing on the EFM8 is very flexible, so most peripherals can be routed to any pin. However, some pins are shared between the breakout pads and other functions on the Thunderboard EFM8UB3. The table below shows an overview of the breakout pads and func- tionality that is shared with the kit.

  • Page 11: Mini Simplicity Connector

    3.7.2 Mini Simplicity Connector The Mini Simplicity connector that can be soldered in on the Thunderboard EFM8UB3 allows the use of an external debugger such as a Silicon Labs Wireless Starter Kit (WSTK) with the board. In addition to providing the 2-Wire (C2) debug interface and virtual COM port functionality, the WSTK can also support Advanced Energy Monitoring (AEM).

  • Page 12: Flat Flexible Cable Connector

    UG308: Thunderboard EFM8UB3 User's Guide Hardware 3.7.5 Flat Flexible Cable Connector A small, 6-position connector with 0.50 mm pitch for flat flexible cables (FFC) can be found on the secondary side of the board. The connector (P/N: FH12-6S-0.5SH(55)) allows connections of external Silicon Labs "postage-stamp" (PS) sized evaluation boards to the kit.

  • Page 13: Debugging

    4. Debugging The Thunderboard EFM8UB3 contains an on-board fully functional SEGGER J-Link Debugger that interfaces to the target EFM8 using the Silicon Labs 2-Wire (C2) debug interface. The debugger allows the user to download code and debug applications running in the target EFM8.

  • Page 14: Virtual Com Port

    UG308: Thunderboard EFM8UB3 User's Guide Debugging 4.2 Virtual COM Port The virtual COM port is a connection to a UART of the target EFM8, and allows serial data to be sent and received from the device. The on-board debugger presents this as a virtual COM port on the host computer that shows up when the USB cable is inserted. Alterna- tively, the VCOM port can also be used through the Mini Simplicity Connector with an external WSTK.

  • Page 15: Kit Configuration And Upgrades

    UG308: Thunderboard EFM8UB3 User's Guide Kit Configuration and Upgrades 5. Kit Configuration and Upgrades The kit configuration dialog in Simplicity Studio allows you to change the J-Link adapter debug mode, upgrade its firmware, and change other configuration settings. To download Simplicity Studio, go to http://www.silabs.com/simplicity.

  • Page 16: Schematics, Assembly Drawings And Bom

    UG308: Thunderboard EFM8UB3 User's Guide Schematics, Assembly Drawings and BOM 6. Schematics, Assembly Drawings and BOM Schematics, assembly drawings and bill of materials (BOM) are available through Simplicity Studio when the kit documentation pack- age has been installed. silabs.com | Building a more connected world.

  • Page 17: Kit Revision History And Errata

    UG308: Thunderboard EFM8UB3 User's Guide Kit Revision History and Errata 7. Kit Revision History and Errata 7.1 Revision History The kit revision can be found printed on the box label of the kit, as outlined in the figure below. The kit revision history is summarised in Table 7.1 Kit Revision History on page...

  • Page 18: Board Revision History And Errata

    UG308: Thunderboard EFM8UB3 User's Guide Board Revision History and Errata 8. Board Revision History and Errata 8.1 Revision History The board revision can be found laser printed on the board, and the board revision history is summarised in Table 8.1 Board Revision History on page Table 8.1.

  • Page 19: Document Revision History

    UG308: Thunderboard EFM8UB3 User's Guide Document Revision History 9. Document Revision History Revision 1.0 December, 2017 • Initial document release. silabs.com | Building a more connected world. Rev. 1.0 | 19...
  • Page 20 Trademark Information Silicon Laboratories Inc.® , Silicon Laboratories®, Silicon Labs®, SiLabs® and the Silicon Labs logo®, Bluegiga®, Bluegiga Logo®, Clockbuilder®, CMEMS®, DSPLL®, EFM®, EFM32®, EFR, Ember®, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZRadio®, EZRadioPRO®, Gecko®, ISOmodem®, Micrium, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress®, Zentri and others are trademarks or registered...

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