Stk Pin Mapping - Silicon Laboratories UG291 User Manual

3.3.3 STK Pin Mapping

The pins connected to the WGM110 Wi-Fi Module will vary based on which Starter Kit is used in the configuration. The software run-
ning on the MCU Starter Kit needs to take this into account. The table below shows the pin connections when using either the EFM32
Pearl Gecko PG1 STK or the EFM32 Pearl Gecko PG12 STK.
EXP Header Module Func-
Pin tion
EXP4 SPI_MOSI
EXP6 SPI_MISO
EXP8 SPI_SCLK
EXP10 SPI_CS
EXP12 UART_RXD
EXP14 UART_TXD
EXP3 UART_RTS
EXP5 UART_CTS
EXP7 RESET
Note that the peripheral mapping shown in the right column is just an example. The flexibility of the EFM32 devices allow a number of
different peripherals to be mapped to these pins. The important thing to note is which pin is used for the connection. The peripheral
usage is a design choice that depends on which other resources are required by the application.
silabs.com | Building a more connected world.
Table 3.3. MCU Pin Mapping
EFM32 Pearl Gecko PG1 STK
PC6 (US1_TX#11)
PC7 (US1_RX #11)
PC8 (US1_CLK #11)
PC9 (US1_CS #11)
PA0 (US0_TX #0)
PA1 (US0_RX #0)
PA2 (US0_CTS #31)
PA3 (US0_RTS #31)
PA4
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide
Wi-Fi Expansion Kit
EFM32 Pearl Gecko PG12 STK
PA6 (US2_TX #1)
PA7 (US2_RX #1)
PA8 (US2_CLK #1)
PA9 (US2_CS #1)
PD10 (US0_TX #18)
PD11 (US0_RX #18)
PC9 (US0_CTS #10)
PD9 (US0_RTS #12)
PB6
Rev. 1.0 | 8