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 re-
maining 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.
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
Figure 3.8. Thunderboard EFM32GG12 Connectors
UG371: Thunderboard EFM32GG12 User's Guide
Hardware
silabs.com
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