Hardware and layout
STM32F4DISCOVERY
26/38
Doc ID 022256 Rev 2
PC8
TIM8_CH3/
SDIO_D0/
TIM3_CH3/
USART6_CK/
DCMI_D2
65
45
PC9
I2S_CKIN/
MCO2/
TIM8_CH4/
SDIO_D1/
I2C3_SDA/
DCMI_D3/
TIM3_CH4
66
46
PC10
SPI3_SCK/
I2S3_CK/
UART4_TX/
SDIO_D2/
DCMI_D8/
USART3_TX
78
SCLK
37
PC11
UART4_RX/
SPI3_MISO/
SDIO_D3/
DCMI_D4/
USART3_RX/
I2S3ext_SD
79
38
PC12
UART5_TX/
SDIO_CK/
DCMI_D9/
SPI3_MOSI/
I2S3_SD/
USART3_CK
80
SDIN
35
PC13
RTC_AF1
7
12
PC14
OSC32_IN
8
OSC3
2_
IN
9
PC15
OSC32_OUT
9
OS
C
32
_O
U
T
10
PD0
FSMC_D2/
CAN1_RX
81
36
Table 5.
MCU pin description versus board function (page 7 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
