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UG371: Thunderboard EFM32GG12 User's
Guide
The Thunderboard EFM32GG12 is a low cost, small form factor
development and evaluation platform for the EFM32GG12™ Giant
Gecko Microcontroller.
The Thunderboard contains an EFM32 MCU together with an on-board SEGGER J-Link
debugger for easy debugging through the USB Micro-B debugging connector. Most of
the EFM32GG12 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 EFM32GG12 Giant Gecko's features with custom hardware.
TARGET DEVICE
• EFM32 Giant Gecko Microcontroller
(EFM32GG12B810F1024GM64-AQFN64)
• CPU: 32-bit ARM® Cortex-M4® with FPU
• Memory: 1024 kB flash and 192 kB RAM
• USB feature set
KIT FEATURES
• PDM stereo microphones
• Out-of-box PDM software example
• USB connectivity
• SEGGER J-Link on-board debugger
• Virtual COM port
• User RGB LEDs and pushbuttons
• 34-pin 2.54 mm breakout pads
• Optional Mini-Simplicity connector for
Advanced Energy Monitoring using
external Silicon Labs debugger
SOFTWARE SUPPORT
• Simplicity Studio™
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Table of Contents
1. Introduction ................................3
1.1 Kit Contents ..............................3
1.2 Getting Started .............................3
1.3 Kit Hardware Layout............................3
2. Electrical Specifications ...........................4
2.1 Absolute Maximum Ratings .........................4
3. Hardware .................................5
3.1 Block Diagram..............................5
3.2 Power Supply ..............................6
3.2.1 Self-Powered Mode ..........................6
3.2.2 Bus-Powered Mode ..........................6
3.3 Universal Serial Bus ............................7
3.4 Push Buttons and RGB LEDs ........................7
3.5 PDM Stereo Microphones ..........................8
3.6 On-board Debugger ............................8
3.7 EFM32GG12 Reset ............................9
3.8 Connectors ...............................10
3.8.1 Breakout Pads ...........................11
3.8.2 Mini Simplicity Connector ........................12
3.8.3 EFM32 USB Micro-B Connector......................12
3.8.4 Debug USB Micro-B Connector ......................12
4. Debugging ............................... 13
4.1 On-board Debugger Considerations ......................13
4.2 Virtual COM Port .............................14
4.3 Mini Simplicity Connector ..........................14
5. Kit Configuration and Upgrades ....................... 15
5.1 Firmware Upgrades ............................15
6. Schematics, Assembly Drawings, and BOM ................... 16
7. Kit Revision History and Errata ....................... 17
7.1 Revision History .............................17
7.2 Errata ................................17
8. Board Revision History and Errata ...................... 18
8.1 Revision History .............................18
8.2 Errata ................................18
9. Document Revision History ......................... 19
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Page 3
30 mm
53 mm
USB Micro-B Debug Connector
- Virtual COM port
- Debug access
USB Micro-B Connector
- Connected to EFM32
Push Button 1
Push Button 0
Mini Simplicity
Connector
Power Source
Slide Switch
EFM32GG12
RGB LEDs
{
2.54 mm pitch
Left PDM MIC
Right PDM MIC
Reset
Button
UG371: Thunderboard EFM32GG12 User's Guide
Introduction
1. Introduction
The Thunderboard EFM32GG12 (OPN: SLTB009A) is an excellent starting point to get familiar with the EFM32GG12 Giant Gecko
Microcontrollers. The Thunderboard contains an EFM32 MCU together with an on-board SEGGER J-Link debugger for easy programming and debugging through the USB Micro-B debug connector. The debugger also provides a USB virtual COM port for serial connection to the target application.
Most of the EFM32GG12 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 EFM32GG12 Giant Gecko's features with custom hardware.
1.1 Kit Contents
The following items are included in the box:
• 1x Thunderboard EFM32GG12 board (BRD2207A)
• 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 EFM32GG12 can be found on the Silicon Labs web pages:
https://www.silabs.com/support/getting-started/thunderboard
1.3 Kit Hardware Layout
The layout of the Thunderboard EFM32GG12 is shown below.
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Figure 1.1. Thunderboard EFM32GG12 Hardware Layout
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UG371: Thunderboard EFM32GG12 User's Guide
Electrical Specifications
2. Electrical Specifications
2.1 Absolute Maximum Ratings
Parameter Min Typ Max Unit
Input voltage on EFM32 USB connector 0 +5.5 V
Input voltage on debug USB connector 0 +5.5 V
VMCU max voltage (if applied through some external means) 0 +3.6 V
LDO output current 300 mA
Voltage on any I/O breakout pad -0.3 VMCU+0.3 V
Current per I/O pin (sink) 50 mA
Current per I/O pin (source) 50 mA
Current for all I/O pins (sink) 200 mA
Current for all I/O pins (source) 200 mA
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Page 5
3. Hardware
Mini-Simplicity
Connector
(Not mounted)
USB Micro-B
Connector
Power Source
Switch
Power
Breakout Pads
DBG USB VBUS
MCU USB VBUS
USB
User Buttons
& RGB LEDs
USB Micro-B
Connector
J-Link
Debugger
SWD Debug
Virtual COM
USB
Stereo PDM
Microphones
RL
EFM32GG12
Microcontroller
3.1 Block Diagram
An overview of the Thunderboard EFM32GG12 is illustrated in the figure below.
UG371: Thunderboard EFM32GG12 User's Guide
Hardware
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Figure 3.1. Kit Block Diagram
Page 6
VMCU
DBG USB
LDO
3V3
Power Source
DBG
USB
EFM32GG12
5V
VBUS
EFM USB
LDO
IOVDD
AVDD
VREGVDD
VREGSW
DVDD
VBUS
VREGI
VREGO
VDCDC
VMCU
DBG USB
LDO
3V3
Power Source
EFM32GG12
5V
VBUS
EFM USB
LDO
IOVDD
AVDD
VREGVDD
VREGSW
DVDD
VBUS
VREGI
VREGO
VDCDC
Isolated from VMCU
MCU
USB
UG371: Thunderboard EFM32GG12 User's Guide
Hardware
3.2 Power Supply
The Thunderboard EFM32GG12 can be either bus-powered or self-powered depending on the position of the slide switch marked
"PWR" located in the lower right corner of the board. Both these modes are explained in detail below.
3.2.1 Self-Powered Mode
When the "PWR" slide switch is in the "DBG USB" position, the Thunderboard EFM32GG12 is set up in self-powered mode with its
internal regulator disabled. In this configuration, the EFM32GG12 and the VMCU net are powered by an on-board regulator which
draws power from the USB Micro-B debugging connector. The low-dropout regulator has a total output current capacity of 300 mA,
where some of it is being used to power the on-board debugger through the 3V3 net.
Figure 3.2. Self-powered Mode
3.2.2 Bus-Powered Mode
When the "PWR" slide switch is in the "MCU USB" position, the EFM32GG12 is set up in bus-powered mode. In this configuration, the
EFM32GG12 and the VMCU net are powered by the EFM32's internal 5V-to-3.3 V regulator. The input of the internal regulator (VREGI)
is connected to the VBUS line of the USB Micro-B connector that connects to the EFM32GG12's USB peripheral.
Figure 3.3. Bus-powered Mode
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VBUS
USB_D+
USB_D-
EFM32
USB_VBUS
USB_VREGI
PF10 (USB_DM)
PF11 (USB_DP)
USB Micro-B
Connector
USB_VREGO
Power selector switch
DBG
USB
MCU
USB
1B
PA12 (TIM2_CC0 #1)
PD6 (TIM1_CC0 #4)
PF12 (TIM1_CC3 #5)
PD5 (GPIO)
PD8 (GPIO)
EFM32
User Buttons
& RGB LEDs
PA13 (TIM2_CC1 #1)
PA14 (TIM2_CC2 #1)
PE12 (TIM1_CC2 #1)
1G
1R
0B
0R
0G
UG371: Thunderboard EFM32GG12 User's Guide
Hardware
3.3 Universal Serial Bus
The Thunderboard EFM32GG12 board is equipped with a USB Micro-B connector interfacing the EFM32GG12's USB peripheral. The
figure below shows how the USB lines are connected to the MCU. USB_D+ and USB_D- connects to USB_DP and USB_DM, respectively. In addition, 5 V from VBUS is connected to the USB_VREGI and USB_VBUS pins. These provide power to the EFM32GG12's
internal LDO regulator which again powers the USB PHY inside the chip. The output of the LDO is output on the USB_VREGO pin.
When the power selector switch is set in the "MCU USB" position, USB_VREGO is connected to the VMCU net which powers the chip
and all the peripherals in the target voltage domain. For more information, see Section 3.2 Power Supply.
Figure 3.4. Universal Serial Bus
3.4 Push Buttons and RGB LEDs
The kit has two user push buttons marked BTN0 and BTN1. They are connected directly to the EFM32GG12 and are debounced by RC
filters with a time constant of 1 ms. The buttons are connected to pins PD5 and PD8.
The kit also features two RGB LEDs marked LED0 and LED1, that are controlled by GPIO pins on the EFM32GG12. The LEDs are
connected in an active-low configuration, and each color can be PWM controlled using the EFM32GG12's TIMER/WTIMER peripherals
to generate a wide variety of colors.
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Figure 3.5. Buttons and LEDs
Page 8
PB11 (PDM_DAT0 #3)
PB12 (PDM_CLK #3)
EFM32
PDM MEMS
Microphone (R)
PDM MEMS
Microphone (L)
VDD
PDM_CLK
PDM_CLK
PDM_DATA
PDM_DATA
VDD
MIC_ENABLE
PA8 (GPIO)
MIC_DATA
MIC_CLOCK
VMCU
EFR32MG
VCOM_TX
VCOM_RX
VCOM_CTS
VCOM_RTS
DBG_SWCLK
DBG_SWDIO
DBG_SWO
On-Board
J-Link
Debugger
Host
PC
USB
DBG_RESET
Mini Simplicity
Connector
PC11 (I2C0_SCL#15)
PF0 (DBG_SCLK)
PF1 (DBG_SWDIO)
PF2 (DBG_SWO#0)
PE7 (US0_TX#1)
PE6 (US0_RX#1)
PB5 (US0_RTS#4)
PB6 (US0_CTS#4)
RESETn
EFM32
Isolation & Levelshift
UG371: Thunderboard EFM32GG12 User's Guide
Hardware
3.5 PDM Stereo Microphones
The Thunderboard EFM32GG12 features two Knowles SPK0641HT4H-1 digital MEMS microphones with PDM output. The microphones are configured to form a stereo sound input device using only a single PDM data line. The clock to the microphones are fed
from a pin on EFM32GG12 with PDM clock support. The output from both microphones are connected to the same line and connected
to a pin on the EFM32GG12 supporting PDM data input. An isolation switch controlled by the microphone enable signal powers the
microphones on and off. Note that the switch allows for free use of the PDM data and clock GPIOs when not in use with the microphones.
Figure 3.6. Digital Stereo Microphones
3.6 On-board Debugger
The Thunderboard EFM32GG12 contains a microcontroller separate from the EFM32GG12 Giant Gecko 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.
In addition to providing code download and debug features, the on-board debugger also presents a virtual COM port for general purpose application serial data transfer.
Figure 3.7 On-Board Debugger Connections on page 8 shows the connections between the target EFM32GG12 device and the on-
board debugger. The figure also shows the presence of the Mini Simplicity Connector, and how this is connected to the same I/O pins.
Please refer to section 4. Debugging and section 5. Kit Configuration and Upgrades for more details on debugging.
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Figure 3.7. On-Board Debugger Connections
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UG371: Thunderboard EFM32GG12 User's Guide
Hardware
3.7 EFM32GG12 Reset
The EFM32GG12 MCU can be reset by a few different sources:
• A user pressing the RESET button
• The on-board debugger pulling the #RESET pin low
• An external debugger pulling the #RESET pin low
In addition to the reset sources mentioned above, a reset to the EFM32GG12 will also be issued during board controller boot-up. This
means that removing power to the board controller (unplugging the J-Link USB cable) will not generate a reset, but plugging the cable
back in will, as the board controller boots up.
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EXP2 - VMCU
EXP4 - SPI_MOSI - PA0
EXP18 - 5V
EXP20 - 3V3
EXP6 - SPI_MISO - PA1
EXP8 - SPI_SCLK - PA2
EXP10 - SPI_CS - PA3
EXP12 - UART_TX - PC4
EXP14 - UART_RX - PC5
EXP16 - I2C_SDA - PE4
GND - EXP1
PD0 - EXP3
PD1 - EXP5
PA4 - EXP7
PA5 - EXP9
PA6 - EXP11
PE15 - EXP13
PE5 - I2C_SCL - EXP15
BOARD_ID_SCL - EXP17
BOARD_ID_SDA - EXP19
Mini Simplicity
Connector
PB11 - MIC_DATA
PB12 - MIC_CLK
PB3 - GPIO
PB4 - GPIO
PD2 - GPIO
PD3 - GPIO
PD4 - GPIO
GPIO - PE8
GPIO - PE9
GPIO - PE10
GPIO - PE11
GPIO - PE13
GPIO - PE14
GPIO - PF5
Mini Simplicity
Connector
2 1
VMCU
RST
PA0 - VCOM_TX
PF1 - SWDIO
NC
GND
VCOM_RX - PA1
SWO - PF2
SWCLK - PF0
NC
EFM USB
Micro-B
Connector
Top Side
DBG USB
Micro-B
Connector
Expansion Header
Breakout Pads
2
4
6
8
10
12
14
16
18
20
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
22
24
26
28
30
32
34
Unassigned
GPIO Breakouts
UG371: Thunderboard EFM32GG12 User's Guide
Hardware
3.8 Connectors
Featured on the Thunderboard EFM32GG12 is a Mini Simplicity connector, two USB Micro-B connectors and 34 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. The remaining 14 provide access to unassigned GPIOs.
The placement and pinout of the connectors can be seen in the figure below. See the following sub chapters for additional information
on the connectors.
Figure 3.8. Thunderboard EFM32GG12 Connectors
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UG371: Thunderboard EFM32GG12 User's Guide
Hardware
3.8.1 Breakout Pads
The board provides access to a total of 34 breakout pads of which 28 map to I/O pins of EFM32GG12. 17 of these are located along
the left side of the board while the remaining 17 are located on the right side of the board. The breakout pads allow access to VMCU
(EFM32GG12 power rail), 3.3V (debug LDO regulator), and 5V power rails.
The upper 20 of the breakout pads are pinned out similar to the EXP header found on Silicon Labs Starter Kits, which ensures that
commonly used peripherals such as SPI, UART and I2C buses are available on fixed locations. The rest of the pins are used for
general purpose IO. This allows the definition of expansion boards that can be used in conjunction with a number of different Silicon
Labs starter kits.
The pin-routing on the EFM32GG12 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 EFM32GG12. The table below shows an overview of the breakout
pads and functionality that is shared with the kit.
Table 3.1. Expansion Header Pinout
Pin Connection EXP Header Function Shared Feature Peripheral Mapping
Right Side Breakout Pins
2 VMCU EFM32GG12 voltage domain, included in AEM measurements.
4 PA0 SPI_MOSI US3_TX #0
6 PA1 SPI_MISO US3_RX #0
8 PA2 SPI_SCLK US3_CLK #0
10 PA3 SPI_CS US3_CS #0
12 PC4 UART_TX U0_TX #4
14 PC5 UART_RX U0_RX #4
16 PE4 I2C_SDA I2C0_SDA #7
18 5V Board USB voltage
20 3V3 Board controller supply
Left Side Breakout Pins
1 GND Ground
3 PD0 CAN_RX CAN0_RX #2
5 PD1 CAN_TX CAN0_TX #2
7 PA4 GPIO
9 PA5 GPIO
11 PA6 GPIO
13 PE15 GPIO
15 PE5 I2C_SCL I2C0_SCL #7
17 BOARD_ID_SCL Connected to Board Controller for identification of add-on boards.
19 BOARD_ID_SDA Connected to Board Controller for identification of add-on boards.
Pin EFM32G
Kit peripheral/feature connection Pin EFM32G
G12 I/O
pin
21 PB12 MIC_CLK (PDM_CLK #3) 22 PE8 GPIO
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Table 3.2. Remaining GPIO breakout pads
Kit peripheral/feature connection
G12 I/O
pin
Page 12
UG371: Thunderboard EFM32GG12 User's Guide
Hardware
Pin EFM32G
G12 I/O
pin
Kit peripheral/feature connection Pin EFM32G
G12 I/O
pin
Kit peripheral/feature connection
23 PB11 MIC_DATA (PDM_DAT0 #3) 24 PE9 GPIO
25 PB3 GPIO 26 PE10 GPIO
27 PB4 GPIO 28 PE11 GPIO
29 PD2 GPIO 30 PE13 GPIO
31 PD3 GPIO 32 PE14 GPIO
33 PD4 GPIO 34 PF5 GPIO
3.8.2 Mini Simplicity Connector
The Mini Simplicity connector featured on the Thunderboard EFM32GG12 allows the use of an external debugger such as a Silicon
Labs Wireless Starter Kit (WSTK) with the board. In addition to providing serial wire debug (SWD) and virtual COM port functionality,
the WSTK can also support advanced energy profiling, wireless network analysis and debugging tools. The pinout, which is described
in Table 3.3 Mini Simplicity Connector Pin Descriptions on page 12, is referenced from the EFM32GG12.
Table 3.3. Mini Simplicity Connector Pin Descriptions
Pin number Connection Function Description
1 VMCU VAEM Target voltage on the debugged application. Supplied and monitored
by the AEM when powered by a WSTK with its power selection switch
in the "AEM" position.
2 GND GND Ground.
3 EFM32GG12 reset pin DBG_RST Reset.
4 PE6 VCOM_RX Virtual COM Rx.
5 PE7 VCOM_TX Virtual COM Tx.
6 PF2 DBG_SWO Serial Wire Output.
7 PF1 DBG_SWDIO Serial Wire Data.
8 PF0 DBG_SWCLK Serial Wire Clock.
9 NC NC Not connected on this board
10 NC NC Not connected on this board
3.8.3 EFM32 USB Micro-B Connector
The EFM32 USB port is connected to the Universal Serial Bus (USB0) peripheral on the EFM32GG12. More information is available in
section 3.3 Universal Serial Bus.
3.8.4 Debug USB Micro-B Connector
The debug USB port can be used for uploading code, debugging, and as a Virtual COM port. More information is available in section
4. Debugging.
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UG371: Thunderboard EFM32GG12 User's Guide
Debugging
4. Debugging
The Thunderboard EFM32GG12 contains an on-board fully functional SEGGER J-Link Debugger that interfaces to the target
EFM32GG12 SWD debug interface. The debugger allows the user to download code and debug applications running in the target
EFM32GG12. Additionally, it also provides a virtual COM port (VCOM) to the host computer that is directly connected to the target device's serial port, for general purpose communication between the running application and the host computer.
An external Silicon Labs debugger can also be used with the board by connecting it to the Mini Simplicity connector. This allows advanced debugging features as described in section 4.3 Mini Simplicity Connector. A Silicon Labs Starter Kit (STK) is a good example of
a debugger that can be used with the Thunderboard EFM32GG12 when connected through a debug adapter.
Note: When using an external debugger, the "PWR" slide switch must be placed in the "DBG USB" position, and the debug USB cable
must be removed to ensure correct operation.
Figure 4.1 Thunderboard EFM32GG12 Debugging Possibilities on page 13 shows the possible debug options.
Figure 4.1. Thunderboard EFM32GG12 Debugging Possibilities
4.1 On-board Debugger Considerations
The on-board debugger is a SEGGER J-Link debugger running on an EFM32 Giant Gecko. The debugger is connected to the SWD
and VCOM pins of the target EFM32GG12 through a level shift and isolation circuit. When the debug USB cable is inserted, the onboard debugger is automatically active and takes control of the SWD and VCOM interfaces. This means that debugging or communication will not work with an external STK connected through the Mini Simplicity connector at the same time.
When the debug USB cable is connected, the target EFM32GG12 voltage domain (VMCU) is used to power parts of the level shift and
isolation circuit. Furthermore, depending on the "PWR" slide switch position, the debugger itself may also be powered from the VMCU
rail. These considerations should be taken into account when trying to measure the EFM32GG12 current consumption on the kit while
using the on-board debugger.
When the debug USB cable is disconnected, the on-board debugger is powered down and the level shift and isolation circuit is put in a
partially powered down state, minimizing both leakage current and quiescent current from the target EFM32GG12 voltage domain
(VMCU). This means that high performance power measurements of the EFM32GG12 with either Advanced Energy Monitoring or other
external hardware should be obtained with the debug USB cable disconnected.
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UG371: Thunderboard EFM32GG12 User's Guide
Debugging
4.2 Virtual COM Port
The virtual COM port is a connection to a UART of the target EFM32GG12, 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. Alternatively, the VCOM port can also be used through the Mini Simplicity Connector with an external WSTK.
Data is transferred between the host computer and the debugger through the USB connection, which emulates a serial port using the
USB Communication Device Class (CDC). From the debugger, the data is passed on to the target device through a physical UART
connection.
The serial format is 115200 bps, 8 bits, no parity, and 1 stop bit.
Using the VCOM port through the Mini Simplicity Connector with an external WSTK works in a similar way, but requires that the onboard debugger is unplugged. The board controller on the WSTK then makes the data available over USB (CDC) or an IP socket.
Note: Changing the baud rate for the COM port on the PC side does not influence the UART baud rate between the debugger and the
target device.
4.3 Mini Simplicity Connector
The Mini Simplicity connector is a 10-pin 1.27 mm pitch connector that gives access to advanced debugging features using an external
debugger. Debugging with an external debugger such as a Silicon Labs Starter Kit (STK) or Wireless Starter Kit (WSTK) allows:
• Debugging of the target device through the SWD interface
• Communication using the VCOM port
• Advanced Energy Monitor
Please note that the Mini Simplicity Connector cannot be used at the same time as the on-board debugger is active (debug USB cable
is plugged in). The "Power Source" slide switch must furthermore be placed in the "DBG USB" position, as the Mini Simplicity connector
injects a voltage into the target EFM32GG12 voltage domain. For information on how to correctly connect to the kit, see Figure
4.1 Thunderboard EFM32GG12 Debugging Possibilities on page 13. The recommended way to power the board when using the Mini
Simplicity Connector is to use the AEM voltage supply of the STK or WSTK. Power-cycling of the board, if necessary, can easily be
done by flipping the power switch on the WSTK to "BAT" and back to "AEM".
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UG371: Thunderboard EFM32GG12 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.
In the main window of the Simplicity Studio's Launcher perspective, the debug mode and firmware version of the selected J-Link adapter is shown. Click the [Change] link next to any of them to open the kit configuration dialog.
Figure 5.1. Simplicity Studio Kit Information
5.1 Firmware Upgrades
Upgrading the kit firmware is done through Simplicity Studio. Simplicity Studio will automatically check for new updates on startup.
You can also use the kit configuration dialog for manual upgrades. Click the [Browse] button in the [Update Adapter] section to select
the correct file ending in .emz. Then, click the [Install Package] button.
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Figure 5.2. Kit Configuration Dialog
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UG371: Thunderboard EFM32GG12 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 package has been installed.
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Page 17
SLTB009A
Thunderboard EFM32GG12
124802042
12-12-18
A00
UG371: Thunderboard EFM32GG12 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 17.
Figure 7.1. Revision Info
Table 7.1. Kit Revision History
Kit Revision Released Description
A00 2018-12-12 Initial kit revision.
7.2 Errata
There are no known errata at present.
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UG371: Thunderboard EFM32GG12 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 18.
Table 8.1. Board Revision History
Revision Released Description
A01 2018-12-12 Initial production version.
8.2 Errata
There are no known errata at present.
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Page 19
9. Document Revision History
Revision 1.0
December, 2018
• Initial document release.
UG371: Thunderboard EFM32GG12 User's Guide
Document Revision History
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Page 20
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wireless tools, documentation,
software, source code libraries &
more. Available for Windows,
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Disclaimer
Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or
intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical"
parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes
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