STM32F4DISCOVERY
Hardware and layout
Doc ID 022256 Rev 2
21/38
PA4
SPI1_NSS/
SPI3_NSS/
USART2_CK/
DCMI_HSYNC/
OTG_HS_SOF/
I2S3_WS/
ADC12_IN4/
DAC1_OUT
29
LR
C
K
/A
IN
1x
16
PA5
SPI1_SCK/
OTG_HS_ULPI_CK/
TIM2_CH1_ETR/
TIM8_CHIN/
ADC12_IN5/
DAC2_OUT
30
SCL
/SPC
15
PA6
SPI1_MISO/
TIM8_BKIN/
TIM13_CH1/
DCMI_PIXCLK/
TIM3_CH1/
TIM1_BKIN/
ADC12_IN6
31
SDO
18
PA7
SPI1_MOSI/
TIM8_CH1N/
TIM14_CH1TIM3_CH2/
ETH_MII_RX_DV/
TIM1_CH1N/
RMII_CRS_DV/
ADC12_IN7
32
SD
A/
SD
I/SDO
17
PA8
MCO1/
USART1_CK/
TIM1_CH1/
I2C3_SCL/
OTG_FS_SOF
67
43
PA9
USART1_TX/
TIM1_CH2/
I2C3_SMBA/
DCMI_D0/
OTG_FS_VBUS
68
GREEN
VB
U
S
1
44
PA10
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
LQ
FP10
0
CS
43
L
22
MP
45
D
T
02
LI
S302
D
L
Pu
sh
b
u
tto
n
LE
D
SWD
USB
OS
C
Free
I/O
Po
w
er
s
u
p
p
ly
CN5
CN2
P1
P2
