5. Power Supply is Output or Input, depending on host / daughterboard configuration.

6. INT is an interrupt line.

7. GPIO ports with many alternate functions (like UART, I²C, SPI and analog inputs/outputs) are privileged to offer optimum

flexibility.

Related links

Read TN1238: STMod+ interface specification available on the ST website for more information

2.4.3

Connectivity expansion connector

Figure 20. CN3 connectivity connector top view

b6

b1

a6

a1

This connector is suitable for the STEVAL-STWINWFV1 Wi-Fi expansion board.

Table 3. CN3 pin descriptions

Pin

Description

STM32 pin

Pin

Default Signal

STM32 pin

a1

GND

-

b1

WIFI_DRDY

PE11

a2

CS/USART3_CTS

PB13

b2

WIFI_WAKEUP

PD7

a3

SPI1_CLK/USART3_RTS

PB1

b3

WIFI_BOOT0

PF12

a4

SPI1_MISO/USART3_RX

PD9

b4

WIFI_RST

PC6

a5

SPI1_MOSI/USART3_TX

PD8

b5

I2C3_SDA

PG8

a6

3V3 Output (VDD_WIFI)

-

b6

I2C3_SCL

PG9

2.4.4

Sensor expansion connector

Figure 21. CN4 sensor connector top view

b6

b1

a6

a1

This connector is suitable for the STEVAL-STWINMAV1 analog microphone expansion board.

Table 4. CN4 pin descriptions

Pin

Description

STM32 pin

Pin

Default Signal

STM32 pin

a1

5V/Batt Output

-

b1

DFSDM1_D7

PB10

UM2777

Buttons, LEDs and connectors

UM2777 - Rev 4

page 18/44