ST STM32 Nucleo-32 User Manual page 22

Hardware layout and configuration
Connector
CN4
CN4
1. Only one USART is available and it is shared between Arduino Nano and VCP. The selection is done by
remapping (no need to change the hardware configuration).
2. D5 PWM on inverted channel Timer 16.
3. D7/D8 shared with OSC_IN/OSC_OUT.
4. SPI_CS is made by GPIO.
5. Limitations on A4 and A5, D4 and D5, related to
bridges
22/37
Table 9. Arduino Nano connectors on NUCLEO-F031K6 (continued)
Pin number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
according to SB16/SB18 setting.
Pin name STM32 pin
Right connector
VIN -
GND -
RESET NRST
+5V -
A7 PA2
A6 PA7
(5)
A5 PA6
(5)
A4 PA5
A3 PA4
A2 PA3
A1 PA1
A0 PA0
AREF -
+3V3 -
D13 PB3
2
I C
configuration, are explained in
UM1956 Rev 5
UM1956
Function
Power input
Ground
RESET
5 V input/output
ADC_IN2
ADC_IN7
ADC_IN6 || I2C1_SCL
ADC_IN5 || I2C1_SDA
ADC_IN4
ADC_IN3
ADC_IN1
ADC_IN0
AVDD
3.3 V input/output
SPI1_SCK
Section 6.10: Solder