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4.1.1 Pass-through Expansion Header
The Wireless Expansion Board features a footprint for a secondary expansion header. The signals from the expansion header are di-
rectly tied to the corresponding pins in the footprint, allowing daisy-chaining of additional expansion boards if a connector is soldered in.
4.1.2 Expansion Header Pinout
The table below shows the pin assignments of the Expansion Header, and the port pins and peripheral functions that are available on
the WGM110 Wi-Fi Module.
Table 4.1. Expansion Header Pinout
Expansion Header WGM110 Wi-Fi Module Raspberry Pi Con. Mini Simplicity Con.
Pin Function Pin Peripheral Pin(s) Pin
2 WGM110 Wi-Fi Module voltage
domain (power switch set to Low
Power) VMCU - 1
4 SPI_MOSI PD0 USART1_MOSI 19, 33 -
6 SPI_MISO PD1 USART1_MISO 21 -
8 SPI_SCLK PD2 USART1_CLK 23, 38 -
10 SPI_CS PD3 USART1_CS 24 -
12 UART_TX PE11 USART0_RX 8 4
14 UART_RX PE10 USART0_TX 10 5
16 I2C_SDA PE0 I2C1_SDA 3 -
18 Board 5V supply. Used to supply
LDO regulator. 5V 2, 4 -
20 Board 3V3 supply. Only used for
board identification. 3V3 1, 17 -
1 Ground GND 6, 9, 14, 20, 25, 30, 34,
39 2
3 UART_CTS PE13 USART0_RTS 11, 40 -
5 UART_RTS PE12 USART0_CTS 37, 36 -
7 Reset RESETn 16 3
9 GPIO PE14 15 -
11 GPIO PA2 7 -
13 Not Connected - -
15 I2C_SCL PE1 I2C1_SCL 5 -
17 Identification of expansion boards. BOARD_ID_SC
L
- -
19 Identification of expansion boards. BOARD_ID_SD
A
- -
UG291: WGM110 Wi-Fi® Expansion Kit User's Guide
Wireless EXP Board
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