Datasheet

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STM32F4DISCOVERY Hardware and layout

Doc ID 022256 Rev 2 21/38

PA 4

SPI1_NSS/

SPI3_NSS/

USART2_CK/

DCMI_HSYNC/

OTG_HS_SOF/

I2S3_WS/

ADC12_IN4/

DAC1_OUT

29

LRCK/AIN1x

16

PA 5

SPI1_SCK/

OTG_HS_ULPI_CK/

TIM2_CH1_ETR/

TIM8_CHIN/

ADC12_IN5/

DAC2_OUT

30

SCL/SPC

15

PA 6

SPI1_MISO/

TIM8_BKIN/

TIM13_CH1/

DCMI_PIXCLK/

TIM3_CH1/

TIM1_BKIN/

ADC12_IN6

31

SDO

18

PA 7

SPI1_MOSI/

TIM8_CH1N/

TIM14_CH1TIM3_CH2/

ETH_MII_RX_DV/

TIM1_CH1N/

RMII_CRS_DV/

ADC12_IN7

32

SDA/SDI/SDO

17

PA 8

MCO1/

USART1_CK/

TIM1_CH1/

I2C3_SCL/

OTG_FS_SOF

67

43

PA 9

USART1_TX/

TIM1_CH2/

I2C3_SMBA/

DCMI_D0/

OTG_FS_VBUS

68

GREEN

VBUS

1 44

PA 1 0

USART1_RX/

TIM1_CH3/

OTG_FS_ID/

DCMI_D1

69

ID

4 41

Table 5. MCU pin description versus board function (page 2 of 10)

MCU pin Board function

Main

function

Alternate

functions

LQFP100

CS43L22

MP45DT02

LIS302DL

Pushbutton

LED

SWD

USB

OSC

Free I/O

Power supply

CN5

CN2

P1

P2