Hardware and layout
STM32F4DISCOVERY
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Doc ID 022256 Rev 2
PB10
SPI2_SCK/
I2S2_CK/
I2C2_SCL/
USART3_TX/
OTG_HS_ULPI_D3/
ETH_MII_RX_ER/
OTG_HS_SCL/
TIM2_CH3
47
CL
K
34
PB11
I2C2_SDA/
USART3_RX/
OTG_HS_ULPI_D4/
ETH_RMII_TX_EN/
ETH_MII_TX_EN/
OTG_HS_SDA/
TIM2_CH4
48
35
PB12
SPI2_NSS/
I2S2_WS/
I2C2_SMBA/
USART3_CK/
TIM1_BKIN/
CAN2_RX/
OTG_HS_ULPI_D5/
ETH_RMII_TXD0/
ETH_MII_TXD0/
OTG_HS_ID
51
36
PB13
SPI2_SCK/
I2S2_CK/
USART3_CTS/
TIM1_CH1N/
CAN2_TX/
OTG_HS_ULPI_D6/
ETH_RMII_TXD1/
ETH_MII_TXD1/
OTG_HS_VBUS
52
37
PB14
SPI2_MISO/
TIM1_CH2N/
TIM12_CH1/
OTG_HS_DMUSART3_
RTS/
TIM8_CH2N/
I2S2ext_SD
53
38
Table 5.
MCU pin description versus board function (page 5 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