
User
Manual
Ver.
1
Pin
Description
This
is
original
define.
More
alternative
function
mapping
refers
to
STM32F412X
datasheet.Warning:
For
all
the
NC
pins,
please
keep
it
floating
and
do
not
connect
to
ground.
No
Name
Type
Description
1
BOOT0
-
Boot
configuration
option
(default:
Floating,
DO
NOT
connect)
2
PC6
I/O
GPIO
PIN
3
PC0
I/O
GPIO
PIN
4
SPI2_MOSI/PC3
I/O
SPI_MOSI
5
SPI2_NSS/PB12
I/O
SPI_NSS
6
SPI2_SCK/PC7
I/O
SPI_SCK
7
SPI2_MISO/PC2
I/O
SPI_MISO
8
USART2_TX/PA2
I/O
Debug_UART_TX
9
QSPI_BK1_IO3/PA1
I/O
QSPI_IO3
10
VBAT
I
MCU
operating
voltage
input
(power
supply
for
RTC,
external
clock,
32
kHz
oscillator
and
backup
registers
(through
power
switch)
when
VDD
is
not
present.)
11
LPO
I
External
low
power
clock
input
(32.768KHz)
(default:
internal
low
power
clock)
12
USART2_RX/PA3
I/O
Debug_UART_RX
13
MICRO_RST_N
I/O
MCU
Reset
14
WAKE_UP/PA0
I/O
External
Wake
up
15
NC
I
No
function
(default:
Floating,
DO
NOT
connect)
16
NC
I
No
function
(default:
Floating,
DO
NOT
connect)
17
I2C1_SCL/PB8
I/O
I2C_SCL
18
I2C2_SDA/PB9
I/O
I2C_SDA
19
PB7
I/O
GPIO
PIN
20
GND
-
Ground
21
GND
-
Ground
22
NC
-
No
function
(default:
Floating,
DO
NOT
connect)
23
NC
-
No
function
(default:
Floating,
DO
NOT
connect)
24
PA10
I/O
GPIO
PIN
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TECHNOLOGY
CO.,
LTD.
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•
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10