Exp Header Pinout - Silicon Laboratories Alcom UG525 User Manual

3.4.1 EXP Header Pinout

The pin-routing on the EFR32 is very flexible, so most peripherals can be routed to any pin. However, many pins are shared between
the EXP header and other functions on the mainboard. The table below includes an overview of the mainboard features that share pins
with the EXP header.
Pin Connection
20 3V3
18 5V
16 PC07
14 PA09
12 PA08
10 PC00
8 PC03
6 PC02
4 PC01
2 VMCU
19 BOARD_ID_SDA
17 BOARD_ID_SCL
15 PC05
13 PA07
11 PA06
9 PD02
7 PA05
5 PA00
3 PB05
1 GND
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Table 3.1. EXP Header Pinout
EXP Header Function
Board controller supply
Board USB voltage
I2C_SDA
UART_RX
UART_TX
SPI_CS
SPI_SCLK
SPI_MISO
SPI_MOSI
EFR32 voltage domain, included in AEM measurements.
Connected to board controller for identification of add-on boards.
Connected to board controller for identification of add-on boards.
I2C_SCL
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
Ground
UG525: EFR32xG24 2.4 GHz 10 dBm Wireless Pro Kit User's Guide
Shared Feature
SENSOR_SDA
VCOM_RX
VCOM_TX
DISP_SCLK, FLASH_SCLK
FLASH_MISO
DISP_MOSI, FLASH_MOSI
SENSOR_SCL
VCOM_RTS
VCOM_CTS
Connectors
Peripheral Mapping
I2C0_SDA
USART0_RX
USART0_TX
USART1_CS
USART1_CLK
USART1_RX
USART1_TX
I2C0_SCL
USART0_RTS
USART0_CTS
Rev. 1.0 | 12