ST STM32 Nucleo-32 User Manual

UM1956

User manual

STM32 Nucleo-32 boards (MB1180)

Introduction

The STM32 Nucleo-32 boards based on the MB1180 reference board (NUCLEO-F031K6,
NUCLEO-F042K6, NUCLEO-F301K8, NUCLEO-F303K8, NUCLEO-L011K4, NUCLEO­L031K6, NUCLEO-L412KB, NUCLEO-L432KC) provide an affordable and flexible way for
users to try out new concepts and build prototypes with STM32 microcontrollers, choosing
from the various combinations of performance, power consumption and features. The
Arduino™ Nano connectivity support makes it easy to expand the functionality of the
Nucleo-32 open development platform with a wide choice of specialized shields. The
STM32 Nucleo-32 boards do not require any separate probe as they integrate the ST­LINK/V2-1 debugger/programmer and come with the STM32 comprehensive software HAL
library, together with various packaged software examples, as well as direct access to the

®

Mbed™ online resources at http://mbed.org.

Arm

Figure 1.

STM32 Nucleo-32 board

Picture is not contractual.

November 2018 UM1956 Rev 5 1/37

www.st.com

1

Contents UM1956

Contents

1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.2 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.1 STM32 Nucleo-32 board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

6.2 STM32 Nucleo-32 board mechanical drawing . . . . . . . . . . . . . . . . . . . . . 13

6.3 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.3.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.3.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.4 Power supply and power selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.4.1 Power supply input from USB connector . . . . . . . . . . . . . . . . . . . . . . . . 16

6.4.2 External power supply inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

VIN or +5 V power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

+3V3 power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

6.4.3 External power supply output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.5 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.6 Push-button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.7 JP1 (IDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.8 OSC clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.9 USART virtual communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.10 Solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.11 Arduino Nano connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7 Electrical schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2/37 UM1956 Rev 5

UM1956 Contents

Appendix A Compliance statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A.1 Federal Communications Commission (FCC) and Industry

Canada (IC) Compliance Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A.1.1 FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Part 15.1936 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

A.1.2 IC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Déclaration de conformité. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

UM1956 Rev 5 3/37

3

List of tables UM1956

List of tables

Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 2. Codification explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 3. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 4. SB1 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 5. External power sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 6. OSC clock configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 7. Virtual communication configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 8. Solder bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 9. Arduino Nano connectors on NUCLEO-F031K6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 10. Arduino Nano connectors on NUCLEO-F042K6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 11. Arduino Nano connectors on NUCLEO-F301K8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 12. Arduino Nano connectors on NUCLEO-F303K8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 13. Arduino Nano connectors on NUCLEO-L011K4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 14. Arduino Nano connectors on NUCLEO-L031K6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 15. Arduino Nano connectors on NUCLEO-L412KB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 16. Arduino Nano connectors on NUCLEO-L432KC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 17. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4/37 UM1956 Rev 5

UM1956 List of figures

List of figures

Figure 1. STM32 Nucleo-32 board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 3. STM32 Nucleo-32 board top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 4. STM32 Nucleo-32 board bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 5. STM32 Nucleo-32 board mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 6. USB composite device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 7. NUCLEO-F031K6, NUCLEO-F042K6, NUCLEO-F303K8,

and NUCLEO-F301K8 pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 8. NUCLEO-L011K4, NUCLEO-L031K6, NUCLEO-L412KB

and NUCLEO-L432KC pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 9. STM32 Nucleo-32 board (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 10. MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 11. ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

UM1956 Rev 5 5/37

5

Features UM1956

1 Features

• STM32 microcontrollers in 32-pin packages

• Three LEDs:

– USB communication LED (LD1)
– Power LED (LD2)
– User LED (LD3)

• Reset push-button

• Board expansion connector:

– Arduino™ Nano

• Flexible board power supply options:
– ST-LINK USB V
– External sources

• On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability:
mass storage, Virtual COM port and debug port

• Support of a wide choice of Integrated Development Environments (IDEs) including
IAR™ EWARM

• Arm® Mbed Enabled™ compliant (only for some Nucleo part numbers)

BUS

(a)

, Keil® MDK-ARM

(a)

, GCC-based IDEs, Arm® Mbed™

(b), (c)

a. On Windows® only.

b. Arm and Mbed are registered trademarks or trademarks of Arm Limited (or its subsidiaries) in the US and or

elsewhere.

c. Refer to the https://www.mbed.com website and to Table 1: Ordering information, to determine which Nucleo

board order codes are supported.

6/37 UM1956 Rev 5

UM1956 Product marking

2 Product marking

Evaluation tools marked as "ES" or "E" are not yet qualified and therefore they are not ready
to be used as reference design or in production. Any consequences arising from such usage
will not be at STMicroelectronics’ charge. In no event, will STMicroelectronics be liable for
any customer usage of these engineering sample tools as reference design or in production.

"E" or "ES" marking examples of location:

• On the targeted STM32 that is soldered on the board (for illustration of STM32 marking,

fer to the section Package information of the STM32 datasheet at www.st.com).

re

• Next to the evaluation tool ordering part number, that is stuck or silk-screen printed on

ard.

the bo

Some boards feature a specific STM32 device version, which allows
bundled commercial stack/library available. This STM32 device shows a "U" marking option
at the end of the standard part number and is not available for sales.

In order to use the same commercial stack in his ap
purchase a part number specific to this stack/library. The price of those part numbers
includes the stack/library royalties.

3 Ordering information

To order the STM32 Nucleo-32 board, refer to Tab le 1.

Order code Reference board Targe t S T M 3 2

NUCLEO-F031K6

NUCLEO-F042K6

NUCLEO-F301K8 STM32F301K8T6

NUCLEO-F303K8

NUCLEO-L011K4

NUCLEO-L031K6

NUCLEO-L412KB STM32L412KBU6U

NUCLEO-L432KC

1. Arm® Mbed Enabled™.

2. Refer to Chapter 2: Product marking for details.

(1)

(1)

(1)

(1)

(1)

(1)

Table 1. Ordering information

MB1180

the operation of any

plication, a developer may need to

STM32F031K6T6

STM32F042K6T6

STM32F303K8T6

STM32L011K4T6

STM32L031K6T6

(2)

STM32L432KCU6U

(2)

UM1956 Rev 5 7/37

36

Conventions UM1956

The meaning of the codification is explained in Table 2.

NUCLEO-TXXXKY Description Example: NUCLEO-L412KB

TXXX STM32 product line STM32L412

K STM32 package pin count 32 pins

Y

Table 2. Codification explanation

STM32 Flash memory size:
– 4 for 16 Kbytes
– 6 for 32 Kbytes
– 8 for 64 Kbytes
–B for 128 Kbytes
–C for 256 Kbytes

128 Kbytes

The order code is mentioned on a sticker, placed on the top side of the board.

4 Conventions

Tabl e 3 provides the conventions used for the ON and OFF settings in the present

document.

Convention Definition

Jumper JPx ON Jumper fitted

Jumper JPx OFF Jumper not fitted

Solder bridge SBx ON SBx connections closed by solder or 0 ohm resistor

Solder bridge SBx OFF SBx connections left open

Table 3. ON/OFF conventions

In this document the reference is “STM32 Nucleo-32 board” for all information that is
common to all sale types.

8/37 UM1956 Rev 5

UM1956 Quick start

5 Quick start

The STM32 Nucleo-32 board is a low-cost and easy-to-use development kit used to quickly
evaluate and start a development with an STM32 microcontroller in LQFP32 or UFQFPN32
package.

Before installing and using the product, accept the Evaluation Product License Agreement
that can be found at www.st.com/epla.

For more information on the STM32 Nucleo-32 board and to access the demonstration
software, visit the www.st.com/stm32nucleo webpage.

5.1 Getting started

Follow the sequence below, to configure the STM32 Nucleo-32 board and launch the
demonstration software:

• Check solder bridge position on the board, SB1 OFF, SB14 ON (internal regulator), JP1
ON (IDD) selected.

• For a correct identification of all device interfaces from the host PC and before
connecting the board, install the Nucleo USB driver, available at the
www.st.com/stm32nucleo webpage.

• To power the board connect the STM32 Nucleo-32 board to a PC through the USB
connector CN1 with a USB cable Type-A to Micro-B. The red LED LD2 (PWR) and LD1
(COM) light up and green LED LD3 blinks.

• Remove the jumper placed between D2 (CN3 pin 5) and GND (CN3 pin 4).

• Observe how the blinking frequency of the green LED LD3 changes, when the jumper

is in place or when it is removed.

• The demonstration software and several software examples on how to use the STM32
Nucleo-32 board features, are available at the www.st.com/stm32nucleo webpage.

• Develop an application using the available examples.

5.2 System requirements

• Windows® OS (7, 8 and 10), Linux® 64-bit or macOS

• USB Type-A to Micro-B USB cable

a. macOS® is a trademark of Apple Inc. registered in the U.S. and other countries.

®(a)

UM1956 Rev 5 9/37

36

Hardware layout and configuration UM1956

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6 Hardware layout and configuration

The STM32 Nucleo-32 board is based on a 32-pin STM32 microcontroller in LQFP or
UFQFPN package.

Figure 2 illustrates the c

onnections between the STM32 and its peripherals (ST-LINK/V2-1,

push-button, LED, and Arduino Nano connectors).

Figure 3: STM32 Nucleo-32 board top layout and
layout sh

ow the location of these connections on the STM32 Nucleo-32 board.

Figure 2.

Hardware block diagram

Figure 4: STM32 Nucleo-32 board bottom

10/37 UM1956 Rev 5

UM1956 Hardware layout and configuration

U2
STM32

CN1
ST-LINK Micro B
USB connector

LD1
(Red/Green LED)
COM

LD2

(

B1
Reset Button

LD3

(

)

CN2
ST-LINK SWD
connector
(reserved)

SB1

SB2
Connect VCP TX to ST-LINK

SB3
Connect VCP RX to ST-LINK

SB4
Connect PF0/PC14 to MCO

SB6

SB5

SB7
Connect PF1/PC15 to X1

SB8
Connect PF1/PC15 to D7

6.1 STM32 Nucleo-32 board layout

nn

PFP14

Connect PF0/PC14 to D8

X1

Figure 3.

STM32 Nucleo-32 board top layout

Power configuration

Microcontroller

Red LED) Power

Green LED

UM1956 Rev 5 11/37

36

Hardware layout and configuration UM1956

CN4
Arduino Nano connector

CN3
Arduino Nano connector

JP1

easurement

SB14

3.3V regulator output

SB18
Connect D4 to A4

SB16
Connect D5 to A5

SB11
Connect 670 pin 16 to
GND

SB15
Connect D13 to LD3

SB17
Connect MCO to PA0

SB10
Connect VDD to 670
pin 5

SB13
Connect GND to 670 pin
32

SB12
Connect BOOT0 to GND

SB9
ST-LINK RESET

Figure 4.

STM32 Nucleo-32 board bottom layout

12/37 UM1956 Rev 5

IDD m

UM1956 Hardware layout and configuration

6.2 STM32 Nucleo-32 board mechanical drawing

Figure 5. STM32 Nucleo-32 board mechanical drawing

UM1956 Rev 5 13/37

36

Hardware layout and configuration UM1956

6.3 Embedded ST-LINK/V2-1

The ST-LINK/V2-1 programming and debugging tool is integrated in the STM32 Nucleo-32
board. The ST-LINK/V2-1 makes the STM32 Nucleo-32 board mbed enabled.

The embedded ST-LINK/V2-1 supports only the SWD
about debugging and programming features refer to: ST-LINK/V2 in-circuit
debugger/programmer for STM8 and STM32 User manual (UM1075), which describes in
detail all the ST-LINK/V2 features.

The new features supported by the ST-LINK/V2-1 comparing with ST-LINK/V2 are:

• USB software re-enumeration

• Virtual Com port interface on USB

• Mass storage interface on USB

• USB power management request for more than 100 mA power on USB

The features not supported on ST-LINK/V2-1 are:

• SWIM interface

• Minimum supported application voltage limited to 3 V

Known limitation:

• Activating the readout protection on the STM32 target, prevents the target application
fr

om running afterwards. The target readout protection must be kept disabled on ST-

LINK/V2-1 boards.

The embedded ST-LINK/V2-1 is directly connected to the SWD p

6.3.1 Drivers

The ST-LINK/V2-1 requires a dedicated USB driver, which, for Windows® 7, 8 and 10, can
be found at www.st.com.

for STM32 devices. For information

ort of the target STM32.

In case the STM32 Nucleo-32 board is connected to
some Nucleo interfaces may be declared as “Unknown” in the PC device manager. In this
case the user must install the driver files (refer to Figure 6) and from the device manager
update the driver of the connected device.

Note: Prefer using the “USB Composite Device” handle for a full recovery.

Figure 6.

14/37 UM1956 Rev 5

USB composite device

the PC before the driver is installed,

UM1956 Hardware layout and configuration

6.3.2 ST-LINK/V2-1 firmware upgrade

The ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the
USB port. As the firmware may evolve during the lifetime of the ST-LINK/V2-1 product (for
example new functionalities added, bug fixes, support for new microcontroller families), it is
recommended to visit www.st.com before starting to use the STM32 Nucleo-32 board and
periodically, to stay up-to-date with the latest firmware version.

UM1956 Rev 5 15/37

36

Hardware layout and configuration UM1956

6.4 Power supply and power selection

The power supply is provided either by the host PC through the USB cable, or by an
external source: VIN (7 V-12 V), +5 V (5 V) or +3V3 power supply pins on CN4. In case VIN,
+5 V or +3V3 is used to power the STM32 Nucleo-32 board, this power source must comply

e standard EN-60950-1: 2006+A11/2009, and must be Safety Extra Low Voltage

with th
(SELV) with limited power capability.

In case the power supply is +3V3, the ST-LINK is not powered and cannot be used.

6.4.1 Power supply input from USB connector

The STM32 Nucleo-32 board and shield board can be powered from the ST-LINK USB
connector CN1. Note that only the ST-LINK part is power supplied before the USB
enumeration phase, as the host PC only provides 100 mA to the boards at that time. During

USB enumeration, the STM32 Nucleo-32 board requires 300 mA of current to the host

the
PC. If th
powered and the red LED LD2 is turned on, thus the STM32 Nucleo-32 board and its shield
consume a maximum of 300 mA current and not more. If the host is not able to provide the
re
supplied. As a consequence the red LED LD2 stays turned off. In such case it is mandatory
to use an external power supply as explained in the next Section 6.4.2: External power

supply inputs.

e host is able to provide the required power, the targeted STM32 microcontroller is

quired current, the targeted STM32 microcontroller and the shield board are not power

SB1 is configured according to the maximum cur
set to on to inform the host PC that the maximum current consumption does not exceed
100 mA (even when Arduino Nano shield is plug
will always succeed since no more than 100 mA is requested to the host PC. Possible

nfigurations of SB1 are summarized in Tab le 4.

co

Solder bridge state Power supply Allowed current

SB1 OFF (default)

USB power through CN1

SB1 ON 100 mA max

SB1 (ON/OFF) VIN, +3V3 or +5 V power For current limitation refer to Ta bl e 5

Table 4. SB1 configuration

Warning: If the maximum current consumption of the STM32 Nucleo-32

board and its shield board exceed 300
power the STM32 Nucleo-32 board, using an external power
supply connected to VIN, +5 V or +3V3.

Note: In case the board is powered by a USB charge

LD2 remains set to off permanently and the target STM32 is not powered. In this specific
case the SB1 must be set to on, to allow the target STM32 to be powered anyway.

rent consumption of the board. SB1 can be

ged). In such condition USB enumeration

300 mA max

mA, it is mandatory to

r, there is no USB enumeration, so the LED

16/37 UM1956 Rev 5

UM1956 Hardware layout and configuration

6.4.2 External power supply inputs

The STM32 Nucleo-32 board and its shield boards can be powered in three different ways
from an external power supply, depending on the voltage used. The three power sources
are summarized in the Table 5.

Table 5. External power sources

Input power

name

VIN CN4 pin 1 7 V to 12 V 800 mA

+5 V CN4 pin 4

+3V3 CN4 pin 14 3 V to 3.6 V -

Connector

pin

Voltage

range

4.75 V to

5.25 V

Max current Limitation

From 7 V to 12 V only and input

rrent capability is linked to input

cu
voltage:

800 mA input current when VIN=7 V
450 mA input current when

7 V< VIN <9 V
300 mA input current when

10 V> VIN >9 V
less than 300 mA input current when

N>10 V

VI

500 mA ST-LINK not powered

ST-LINK not powered and SB14 and
SB9 must be off.

VIN or +5 V power supply

When powered from VIN or +5 V, it is still possible to use ST-LINK for communication for
programming or debugging only, but it is mandatory to power the board first, using VIN or
+5 V, then to connect the USB cable to the PC.
anyway, thanks to the external power source.

By this way the enumeration will succeed

The following power sequence procedure must be respected:

1. Check that SB1 is off

2. Connect the external power source to VIN or +5 V

3. Power on the external power supply 7 V< VIN < 12 V to VIN, or 5 V for +5 V

4. Check red LED LD2 is turned on

5. Connect the PC to USB connector CN1

If this order is not respected, the board may be powered by VBUS first, then by VIN or +5 V,
and the

following risks may be encountered:

1. If more than 300 mA current is needed by the board, the PC may be damaged or

rent supplied is limited by the PC. As a consequence the board is not powered

cur
correctly.

2. 300 mA is requested at enumeration (since SB1 must

be off) so there is the risk that
the request is rejected and the enumeration does not succeed if the the PC cannot
provide such current. Consequently the board is not power supplied (LED LD2 remains
off).

UM1956 Rev 5 17/37

36

Hardware layout and configuration UM1956

+3V3 power supply

Using the +3V3 (CN4 pin 14) directly as power input, can be interesting, for instance, in
case the 3.3
programming and debugging features are not available. When the board is powered by
+3V3 (CN4 pin 14), the solder bridge SB14 and SB9 (NRST) must be off.

V is provided by a shield board. In this case the ST-LINK is not powered, thus

6.4.3 External power supply output

When powered by USB or VIN, the +5 V (CN4 pin 4) can be used as output power supply
for an Arduino Nano shield. In this case, the maximum current of the power source specified
in

Tabl e 5: External power sources must be respected.

The +3.3 V (CN4 pin 14) can be used also as power supply output. The current is limited by
the maximum current capability of the regulator U3 (500

mA max).

6.5 LEDs

The tricolor LED (green, orange, red) LD1 (COM) provides information about ST-LINK
communication status. LD1 default color is red. LD1 turns to green to indicate that the
communication is in progress between the PC and the ST-LINK/V2-1, with the following
setup:

• Slow blinking red/off: at power-on before USB initialization

• Fast blinking red/off: after the first correct communication between PC and ST-

LINK/V2-1 (enumeration)

• Red on: when initialization between PC and ST-LINK/V2-1 is completed

• Green on: after a successful target communication initialization

• Blinking red/green: during communication with target

• Green on: communication finished and successful

• Orange on: communication failure

User LD3: the green LED is a user LED connected to Arduino Nano signal D13
corresponding to the STM32 I/O PB3 (pin 26). Refer to

Tabl e 13, Ta bl e 14, Ta bl e 15 and Table 16 for concerned STM32:

• When the I/O is HIGH value, the LED is on

• When the I/O is LOW, the LED is off

PWR LD2: the red LED indicates that the STM32 part is powered and +5 V power is
available.

6.6 Push-button

B1 RESET: the push-button is connected to NRST, and it is used to reset the STM32.

18/37 UM1956 Rev 5

Tabl e 9, Ta bl e 10, Ta bl e 12,

UM1956 Hardware layout and configuration

6.7 JP1 (IDD)

JP1, labeled IDD, is used to measure the STM32 microcontroller consumption by removing
the jumper and connecting an ammeter:

• JP1 on: STM32 is powered (default)

• JP1 off: an ammeter must be connected to measure the STM32 current

If there is no ammeter, STM32 is not powered.

6.8 OSC clock

U2 pin 2 and pin 3 can be used as OSC clock input or as Arduino Nano D8 and D7 GPIO.
There are four ways to configure the pins corresponding to different STM32 and clock usage
(refer to Tab le 6).

SB4 SB17 SB6 SB8

ON OFF OFF ON OFF

OFF OFF ON ON OFF

OFF ON OFF OFF OFF

OFF OFF OFF OFF ON

OFF OFF ON ON/OFF OFF

OFF OFF ON/OFF ON OFF

1. In applications where VCP is used for communication at a speed higher than 9600 bauds, it may be
needed to use this solder bridge configuration, to use 8 MHz clock (MCO from ST-LINK) and get a more

cise frequency.

pre

Table 6. OSC clock configurations

Solder bridge

SB5 and

SB7

STM32 Clock configuration

MCO from ST-LINK
co

nnected to OSCIN

STM32Fxxx

STM32Lxxx

All

(1)

(PF0)

HSI configuration
(d

efault configuration)

MCO from ST-LINK

nnected to CKIN

co

(1)

(PA0)

32K LSE mounted on X1
(d

Arduino Nano D7
co

Arduino Nano D8
co

efault configuration)

nnected to PF0 / PC14

nnected to PF1 / PC15

Boards with STM32Lxxx are delivered with 32.768 KHz crystal (X1). Associated capacitors
and solder bridges (C12, C13 and SB4 to SB8) are configured to support LSE by default.

Boards with STM32Fxxx are delivered without crystal (X1). Associated capacitors (C12,
C13

) are not populated and SB4 to SB8 are configured to support HSI by default.

UM1956 Rev 5 19/37

36

Hardware layout and configuration UM1956

6.9 USART virtual communication

Thanks to SB2 and SB3, the USART interface of STM32 available on PA2 (TX) and PA15
(RX), can be connected to ST-LINK/V2-1. When USART is not used it is possible to use PA2
as Arduino Nano A7. Refer to Table 7.

Bridge State

Table 7. Virtual communication configuration

(1)

Description

SB2

OFF

ON PA2 is connected to ST-LINK as virtual Com TX (default).

OFF PA15 is not connected.

SB3

ON PA15 is connected to ST-LINK as virtual Com RX (default).

1. The default configuration is reported in bold style.

6.10 Solder bridges

Bridge State

SB10 (VREF+)

SB15 (LD3-LED)

SB9 (NRST)

SB11 (PB2/VSS)

SB13 (PB8/VSS)

SB12 (PB8/BOOT0)

SB16 ON

PA2 is connected to CN4 pin 5 as Arduino Nano analog input A7 and
disco

nnected from ST-LINK USART.

Table 8. Solder bridges

(1)

ON VREF+ on STM32 is connected to VDD.

OFF

VREF+ on STM32 is not connected to VDD and it is provided by

in 13 of CN4.

p

ON Green user LED LD3 is connected to

OFF Green user LED LD3 is not connected.

The NRST signal of ST-LINK is conn

ON

STM32.

The NRST signal of ST-LINK is not conn

OFF

the STM32, when used external power (+3V3, +5 V) as power
supply.

ON Pin 16 of STM32 (U2) is connected to

OFF

Pin 16 of STM32 (U2) is not connected to
PB2 for STM32F031.

ON Pin 32 of STM32 (U2) is connected to

OFF

OFF

Pin 32 of STM32 (U2) is not connected to
PB8 for STM32F031.

Pin 31 of STM32 (U2) is connected to GND via 10K pull-down and

ON

used

as BOOT0.

Pin 16 of STM32 (U2) is not connected and is GPIO PB8 for

F042.

STM32

STM32 PB6 is connected to CN4 pin 7 for I
Arduino Nano A5. In such case STM32 PB6 does not support
Arduino Nano D5 and PA6 must be configured as input floating.

Description

D13 of Arduino Nano signal.

ected to the NRST pin of the

ected to the NRST pin of

VSS.

VSS, and used as GPIO

VSS.

VSS, and used as GPIO

2

C SDA support on

20/37 UM1956 Rev 5

UM1956 Hardware layout and configuration

Table 8. Solder bridges (continued)

Bridge State

(1)

Description

SB16 OFF

CN4 pin 7 is used as Arduino Nano analog input A5 without I2C
support and CN3 pin 8 is available as Arduino Nano D5.

STM32 PB7 is connected to CN4 pin 8 for I2C SCL support on

ON

Arduino Nano A4. In such case STM32 PB7 does not support

SB18

OFF

1. The default configuration is reported in bold style.

Arduino Nano D4 and PA5 must be configured as input floating.

CN4 pin 8 is used as Arduino Nano analog input A4 without I2C
support and CN3 pin 7 is available as Arduino Nano D4.

6.11 Arduino Nano connectors

CN3 and CN4 are male connectors compatible with Arduino Nano standard. Most shields
designed for Arduino Nano can fit the STM32 Nucleo-32 board.

Caution: The I/Os of STM32 are 3.3 V compatible instead of 5 V for Arduino Nano.

Tabl e 9, Ta bl e 10, Table 12, Ta bl e 13, Table 14, Tab l e 15 and Tab le 16 show the pin

assignments of each STM32 on Arduino Nano connectors.

Figure 7 and Figure 8 show Arduino Nano connectors and pin assignments for

NUCLEO-F031K6, NUCLEO-F042K6, NUCLEO-F303K8, NUCLEO-L011K4, NUCLEO­L031K6 and NUCLEO-L432KC.

Table 9. Arduino Nano connectors on NUCLEO-F031K6

Connector Pin number Pin name STM32 pin Function

Left connector

1 D1 PA9 USART1_TX

2 D0 PA10 USART1_RX

3 RESET NRST RESET

4 GND - Ground

5 D2 PA12 -

6 D3 PB0 TIM3_CH3

(5)

(5)

PB7 -

PB6 TIM16_CH1N

CN3

7 D4

8 D5

9 D6 PB1 TIM14_CH1

10 D7

11 D8

(3)

(3)

PF0 -

PF1 -

12 D9 PA8 TIM1_CH1

13 D10 PA11 SPI_CS

(4)

|| TIM1_CH4

14 D11 PB5 SPI1_MOSI || TIM3_CH2

15 D12 PB4 SPI1_MISO

(1)

(1)

(2)

UM1956 Rev 5 21/37

36

Hardware layout and configuration UM1956

Table 9. Arduino Nano connectors on NUCLEO-F031K6 (continued)

Connector Pin number Pin name STM32 pin Function

Right connector

CN4 1 VIN - Power input

2 GND - Ground

3 RESET NRST RESET

4 +5V - 5 V input/output

5 A7 PA 2 ADC_IN2

6 A6 PA 7 ADC_IN7

7 A5

8 A4

CN4

9 A3 PA 4 ADC_IN4

10 A2 PA 3 ADC_IN3

11 A1 PA 1 ADC_IN1

12 A0 PA 0 ADC_IN0

13 AREF - AVDD

14 +3V3 - 3.3 V input/output

(5)

(5)

PA6 ADC_IN6 || I2C1_SCL

PA5 ADC_IN5 || I2C1_SDA

15 D13 PB3 SPI1_SCK

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 I

bridges according to SB16/SB18 setting.

2

C configuration, are explained in Section 6.10: Solder

22/37 UM1956 Rev 5

UM1956 Hardware layout and configuration

Table 10. Arduino Nano connectors on NUCLEO-F042K6

Connector Pin number Pin name STM32 pin Function

Left connector
1 D1 PA9 USART1_TX
2 D0 PA10 USART1_RX
3 RESET NRST RESET
4 GND - Ground
5 D2 PA12 ­6 D3 PB0 TIM3_CH3

(1)

(1)

PB7 ­PB6 TIM16_CH1N

CN3

7 D4
8 D5
9 D6 PB1 TIM14_CH1

10 D7
11 D8

(3)

(3)

PF0 -

PF1 ­12 D9 PA8 TIM1_CH1
13 D10 PA11 SPI_CS

(4)

|| TIM1_CH4
14 D11 PB5 SPI1_MOSI || TIM3_CH2
15 D12 PB4 SPI1_MISO

Right connector
1 VIN - Power input
2 GND - Ground
3 RESET NRST RESET
4 +5V - 5 V input/output
5 A7 PA2 ADC_IN2
6 A6 PA7 ADC_IN7

CN4

7 A5
8 A4

(1)

(1)

PA6 ADC_IN6 || I2C1_SCL
PA5 ADC_IN5 || I2C1_SDA

9 A3 PA4 ADC_IN4

10 A2 PA3 ADC_IN3
11 A1 PA 1 ADC_IN1
12 A0 PA0 ADC_IN0
13 AREF - AVD D
14 +3V3 - 3.3 V input/output
15 D13 PB3 SPI1_SCK

1. Limitations on A4 and A5, D4 and D5, related to I

bridges according to SB16/SB18 setting.

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. A7 exclusive with VCP_TX.

2

C configuration, are explained in Section 6.10: Solder

(2)

(5)

UM1956 Rev 5 23/37

36

Hardware layout and configuration UM1956

Table 11. Arduino Nano connectors on NUCLEO-F301K8

Connector Pin number Pin name STM32 pin Function

Left connector
1 D1 PA9 USART1_TX
2 D0 PA10 USART1_RX
3 RESET NRST RESET
4 GND - Ground
5 D2 PA12 ­6 D3 PB0 TIM1_CH2N

(2)

(2)

PB7 ­PB6 TIM16_CH1N

CN3

7 D4
8 D5
9 D6 PB1 TIM1_CH3N

10 D7

11 D8

(3)

(3)

PF0 -

PF1 ­12 D9 PA8 TIM1_CH1
13 D10 PA11 SPI_CS

(4)

|| TIM1_CH4
14 D11 PB5 SPI3_MOSI || TIM17_CH1
15 D12 PB4 SPI3_MISO

Right connector
1 VIN - Power input
2 GND - Ground
3 RESET NRST RESET
4 +5V - 5 V input/output
5 A7 PA2 ADC1_IN3
6 A6 PA7 ADC1_IN5

CN4

7 A5
8 A4

(2)

(2)

PA6 ADC1_IN10 || I2C1_SCL
PA5 ADC

(6)

|| I2C1_SDA

9 A3 PA4 ADC1_IN5

10 A2 PA3 ADC1_IN4

11 A1 PA1 ADC1_IN2
12 A0 PA0 ADC1_IN1
13 AREF - AVDD
14 +3V3 - 3.3 V input/output
15 D13 PB3 SPI3_SCK

1. D3, D5, and D6 PWM on inverted channel.

2. Limitations on A4 and A5, D4 and D5, related to I

bridges according to SB16/SB18 setting.

3. D7/D8 shared with OSC_IN/OSC_OUT.

4. SPI_CS is made by GPIO.

5. PA2 exclusive with VCP_TX.

6. No ADC on A4.

2

C configuration, are explained in Section 6.10: Solder

(1)

(1)

(1)

(5)

24/37 UM1956 Rev 5

UM1956 Hardware layout and configuration

Table 12. Arduino Nano connectors on NUCLEO-F303K8

Connector Pin number Pin name STM32 pin Function

Left connector
1 D1 PA9 USART1_TX
2 D0 PA10 USART1_RX
3 RESET NRST RESET
4 GND - Ground
5 D2 PA12 ­6 D3 PB0 TIM3_CH3

(1)

(1)

PB7 ­PB6 TIM16_CH1N

CN3

7 D4
8 D5
9 D6 PB1 TIM3_CH4

10 D7

11 D8

(3)

(3)

PF0 -

PF1 ­12 D9 PA8 TIM1_CH1
13 D10 PA11 SPI_CS

(4)

|| TIM1_CH4
14 D11 PB5 SPI1_MOSI || TIM17_CH1
15 D12 PB4 SPI1_MISO

Right connector
1 VIN - Power input
2 GND - Ground
3 RESET NRST RESET
4 +5V - 5 V input/output
5 A7 PA2 ADC1_IN3
6 A6 PA7 ADC2_IN4

CN4

7 A5
8 A4

(1)

(1)

PA6 ADC2_IN3 || I2C1_SCL
PA5 ADC2_IN2 || I2C1_SDA

9 A3 PA4 ADC2_IN1

10 A2 PA3 ADC1_IN4

11 A1 PA1 ADC1_IN2
12 A0 PA0 ADC1_IN1
13 AREF - AVDD
14 +3V3 - 3.3 V input/output
15 D13 PB3 SPI1_SCK

1. Limitations on A4 and A5, D4 and D5, related to I

bridges according to SB16/SB18 setting.

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. A7 exclusive with VCP_TX.

2

C configuration, are explained in Section 6.10: Solder

(2)

(5)

UM1956 Rev 5 25/37

36

Hardware layout and configuration UM1956

Connector

Table 13. Arduino Nano connectors on NUCLEO-L011K4

nu

Pin

mber

Pin Name STM32 pin Function

Left connector
1 D1 PA9 USART2_TX
2 D0 PA10 USART2_RX

(1)

(1)

3 RESET NRST RESET
4 GND - Ground
5 D2 PA12 -

(2)

(2)

CN3

6 D3 PB0 TIM2_CH3
7 D4
8 D5

(3)

(3)

PB7
PB6 TIM2_CH3

9 D6 PB1 TIM2_CH4

10 D7

11 D8
12 D9 PA 8 TIM
13 D10 PA 11 SPI_CS
14 D11 PB5 SPI1_MOSI || TIM

(4)

(4)

PC14 ­PC15 -

(6)

(5)

|| TIM

(5)

(5)

15 D12 PB4 SPI1_MISO

Right connector
1 VIN - Power input
2 GND - Ground
3 RESET NRST RESET
4 +5V - 5 V input/output
5 A7 PA2 ADC_IN2

(7)

6 A6 PA7 ADC_IN7

(3)

(3)

PA6 ADC_IN6 || I2C1_SCL
PA5 ADC_IN5 || I2C1_SDA

CN4

7 A5
8 A4
9 A3 PA4 ADC_IN4

10 A2 PA3 ADC_IN3

11 A1 PA1 ADC_IN1
12 A0 PA0 ADC_IN0
13 AREF - AVDD
14 +3V3 - 3.3 V input/output
15 D13 PB3 SPI1_SCK

1. Only one USART is available and it is shared between Arduino Nano and VCP. The selection is done by
remapping (no hardware configuration to change).

2. D3 and D5 PWM are using same channel of TIM2_CH3.

3. Limitations on A4 and A5, D4 and D5, related to I2C configuration, are explained in Section 6.10: Solder

bridges according to SB16/SB18 setting.

4. D7/D8 shared with OSC_IN/OSC_OUT.

5. No PWM on D9, D10, D11.

6. SPI_CS is made by GPIO.

7. PA2 exclusive with VCP_TX.

26/37 UM1956 Rev 5

UM1956 Hardware layout and configuration

Table 14. Arduino Nano connectors on NUCLEO-L031K6

Connector Pin number Pin name STM32 pin Function

Left connector
1 D1 PA9 USART2_TX
2 D0 PA 10 USART2_RX

(1)

(1)

3 RESET NRST RESET
4 GND - Ground
5 D2 PA 12 ­6 D3 PB0 TIM2_CH3

CN3

7 D4
8 D5

(2)

(2)

PB7 ­PB6 TIM21_CH1

9 D6 PB1 TIM2_CH4

10 D7
11 D8

(3)

(3)

PC14 -

PC15 ­12 D9 PA8 TIM2_CH1
13 D10 PA11 SPI_CS

(4)

|| TIM21_CH2
14 D11 PB5 SPI1_MOSI || TIM22_CH2
15 D12 PB4 SPI1_MISO

Right connector
1 VIN - Power input
2 GND - Ground
3 RESET NRST RESET
4 +5V - 5 V input/output
5 A7 PA2 ADC_IN2

(5)

6 A6 PA7 ADC_IN7

CN4

7 A5
8 A4

(2)

(2)

9 A3 PA4

PA6 ADC_IN6 || I2C1_SCL
PA5 ADC_IN5 || I2C1_SDA

ADC_IN4
10 A2 PA3 ADC_IN3
11 A1 PA 1 ADC_IN1
12 A0 PA0 ADC_IN0
13 AREF - AVDD
14 +3V3 - 3.3 V input/output
15 D13 PB3 SPI1_SCK

1. Only one USART is available and it is shared between Arduino Nano and VCP. The selection is done by
remapping (no hardware configuration to change).

2. Limitations on A4 and A5, D4 and D5, related to I

bridges according to SB16/SB18 setting.

3. D7/D8 shared with OSC32_IN/OSC32_OUT.

4. SPI_CS is made by GPIO.

5. PA2 exclusive with VCP_TX.

2

C configuration, are explained in Section 6.10: Solder

UM1956 Rev 5 27/37

36

Hardware layout and configuration UM1956

Table 15. Arduino Nano connectors on NUCLEO-L412KB

Connector Pin number Pin name STM32 pin Function

Left connector
1 D1 PA9 USART1_TX
2 D0 PA10 USART1_RX
3 RESET NRST RESET
4 GND - Ground
5 D2 PA12 -

(1)

(1)

(1)

CN3

6 D3 PB0 TIM1_CH2N
7 D4
8 D5

(2)

(2)

PB7 ­PB6 TIM16_CH1N

9 D6 PB1 TIM1_CH3N

10 D7
11 D8

(3)

(3)

PC14 ­PC15 -

12 D9 PA 8 TIM1_CH1

(4)

13 D10 PA 11 SPI_CS
14 D11 PB5 SPI1_MOSI || TIM

|| TIM1_CH4

(5)

15 D12 PB4 SPI1_MISO

Right connector
1 VIN - Power input
2 GND - Ground
3 RESET NRST RESET
4 +5V - 5 V input/output
5 A7 PA2 ADC1_IN7

(6)

6 A6 PA7 ADC1_IN12

CN4

7 A5
8 A4
9 A3

(2)

(2)

PA6 ADC1_IN11 || I2C1_SCL
PA5 ADC1_IN10 || I2C1_SDA

PA4 ADC1_IN9
10 A2 PA3 ADC1_IN8
11 A1 PA 1 ADC1_IN6
12 A0 PA0 ADC1_IN5
13 AREF - AV DD
14 +3V3 - 3.3 V input/output
15 D13 PB3 SPI1_SCK

1. D3, D5 and D6 PWM on inverted channel.

2. Limitations on A4 and A5, D4 and D5, related to I2C configuration, are explained in Section 6.10: Solder

bridges according to SB16/SB18 setting.

3. D7/D8 shared with OSC32_IN/OSC32_OUT.

4. SPI_CS is made by GPIO.

5. No PWM on D11.

6. PA2 exclusive with VCP_TX.

28/37 UM1956 Rev 5

UM1956 Hardware layout and configuration

Table 16. Arduino Nano connectors on NUCLEO-L432KC

Connector Pin number Pin name STM32 pin Function

Left connector
1 D1 PA9 USART1_TX
2 D0 PA10 USART1_RX
3 RESET NRST RESET
4 GND - Ground
5 D2 PA12 -

(1)

(1)

(1)

CN3

6 D3 PB0 TIM1_CH2N
7 D4
8 D5

(2)

(2)

PB7
PB6 TIM16_CH1N

9 D6 PB1 TIM1_CH3N

10 D7
11 D8

(3)

(3)

PC14 ­PC15 -

12 D9 PA 8 TIM1_CH1

(4)

13 D10 PA 11 SPI_CS
14 D11 PB5 SPI1_MOSI || TIM

|| TIM1_CH4

(5)

15 D12 PB4 SPI1_MISO

Right connector
1 VIN - Power input
2 GND - Ground
3 RESET NRST RESET
4 +5V - 5 V input/output
5 A7 PA2 ADC12_IN7

(6)

6 A6 PA7 ADC12_IN12

CN4

7 A5
8 A4

(2)

(2)

9 A3 PA4

PA6 ADC12_IN11 || I2C1_SCL
PA5 ADC12_IN10 || I2C1_SDA

ADC12_IN9
10 A2 PA3 ADC12_IN8
11 A1 PA 1 ADC12_IN6
12 A0 PA0 ADC12_IN5
13 AREF - AV DD
14 +3V3 - 3.3 V input/output
15 D13 PB3 SPI1_SCK

1. D3, D5 and D6 PWM on inverted channel.

2. Limitations on A4 and A5, D4 and D5, related to I2C configuration, are explained in Section 6.10: Solder

bridges according to SB16/SB18 setting.

3. D7/D8 shared with OSC32_IN/OSC32_OUT.

4. SPI_CS is made by GPIO.

5. No PWM on D11.

6. PA2 exclusive with VCP_TX.

UM1956 Rev 5 29/37

36

Hardware layout and configuration UM1956

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*1'

1567

9

$

$

$

$

$

$

$

$

$5()

9

'

&1 &1

$UGXLQR

18&/(2)[[[.[

Figure 7. NUCLEO-F031K6, NUCLEO-F042K6, NUCLEO-F303K8,

and NUCLEO-F301K8 pin assignment

30/37 UM1956 Rev 5

UM1956 Hardware layout and configuration

06Y9

3$

3$

1567

*1'

3$

3%

3%

3%

3%

3&

3&

3$

3$

3%

3%

9,1

*1'

1567

9

3$

3$

3$

3$

3$

3$

3$

3$

$5()

9

3%

18&/(2/[[[.[



























































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'

1567

*1'

'

'

'

'

'

'

'

'

'

'

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9,1

*1'

1567

9

$

$

$

$

$

$

$

$

$5()

9

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&1 &1

$UGXLQR

Figure 8. NUCLEO-L011K4, NUCLEO-L031K6, NUCLEO-L412KB

and NUCLEO-L432KC pin assignment

UM1956 Rev 5 31/37

36

32/37 UM1956 Rev 5

13

TOP

MB1180 C.2

10/12/2015

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

NUCLEO32Project:

REV B: SB14 changed to JP1 Jumper for easy IDD measurement, and enlarge
board length; CN1 USB PN changed to Micro-B for Device.
REV C: Add SB18/SB16 for connecting D4/D5 to A4/A5
REV C.2: correct silkscreen D7/D8 on SB6 and SB8

MCO

VCP_TX

SWCLK

SWDIO

VCP_RX

NRST

U_MCU_32
MCU_32.SchDoc

TMS

TCK

MCO

NRST

STLK_RX
STLK_TX

SWO

U_ST_LINK_V2-1
ST_LINK_V2-1.SCHDOC

7 Electrical schematics

Electrical schematics UM1956

Figure 9. STM32 Nucleo-32 board (top view)

23

MCU

MB1180 C.2

10/12/2015

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

NUCLEO32Project:

C23
100nF

C13

4.3pF

C12

4.3pF

C7
100nF

C11

100nF

R21
10K

PA4
PA5
PA6
PA7

PA11
PA12

PA9
PA10

PA0
PA1

PA15

PA3

PA13
PA14

PA2

PA8

PB5
PB6
PB7

PB1

PB3

PB0

PB4

A0
A1

A3

D3

A2

A7

A5
A6

A4

D4

MCO

VCP_RX

VCP_TX

VDD

L1

BEAD

SWCLK

SWDIO

PF0

PF1

/PC14

/PC15

AVDD

C24
100nF

VDD

SB5

SB7

SB13

SB8

SB10

SB6

D0

D11

D13
D12

D9
D1

D5

SB11

PF0/PC14

2

PF1/PC15

3

PA0

6

PA1

7

PA2

8

PA3

9

PA4

10

PA5

11

PA6

12

PA7

13

PB0

14

PB1/NPOR

15

PB2/VSS2

16

PA8

18

PA9

19

PA10

20

PA11

21

PA12

22

PA13

23

PA14

24

PA15

25

PB4

27

PB5

28

PB6

29

PB7

30

PB8/VSS3

32

NRST

4

VDDA/VREF+

5

VDD2/VDD_USB

17

PB3

26

BOOT0/PB8/PH3

31

VDD3

1

U2

MCU_LQFP32/QFN32

D10
D2

D6

D8

D7

SB12 BOOT0

AVDD

+3V3+5V

A0

A1

A2

A3

A4

A5

D0

D1

D2

D4

D3

D5
D6
D7
D8
D9

D10

NRST

VIN

D13D12

D11

Arduino Connector

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

CN3

Header 15X1_male

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15

CN4

Header 15X1_male

A6

A7

NRST

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9
PA10

PA11

PA12
PB0

PB1

PB3PB4

PB5

PB6

PB7

AVDD

AREF

1 2

LD3
Green

R23

510

SB15

PF0
PF1

Extension connectors

VIN

C22
10uF(25V)

C25
10uF

E5V

D3

STPS2L30A

+3V3

C9
1uF_X5R_0603

C8
100nF

C10
100nF

+5V

VDD

LD2
RED

R22
1K

C14

1uF_X5R_0603

E5V

D4

BAT60JFILM

U5V_ST_LINK

NRST

NRST

B1

KSS221G

X1
NX3215SA-32.768K-EXS00A-MU00525

closed for L021, L031,L433

C13

4.3p

S

S

1

S0

open for F042,F031,F303

SB14

SB4

Vin3Vout

2

1

Tab

4

U6
LD1117S50TR

EN

1

GND

2

VO

4

NC5GND

0

VI

6

PG

3

U3
LD39050PU33R

VO

SB17

JP1

PH127H10102JNG-2/3/1.5

SB16
SB18

PB6
PB7

UM1956 Rev 5 33/37

UM1956 Electrical schematics

B5

F

X
NX3215SA-32.768K-EX

Figure 10. MCU

B7

33

STLINK/V2-1

MB1180 C.2

10/12/2015

Title:

Size: Reference:

Date: Sheet: of

A4

Revision:

NUCLEO32Project:

1 2

X2

NX3225GD 8MHz EXS00A-CG04874

USB_DM

USB_DP

STM_RST

T_JTCK

T_JTCK

T_JTDO

T_JTDI

T_JTMS

STM_JTMS

STM_JTCK

OSC_IN
OSC_OUT

T_NRST

AIN_1

USB ST-LINK

U5V

COM

PWR

Board Ident: PC13=0

T_JTCK
T_JTMS

SWCLK

SWDIO

T_SWDIO_IN

LED_STLINK

LED_STLINK

TMS

TCK

TCK/SWCLK
TMS/SWDIO

MCO

MCO

T_JRST

NRST

T_NRST

STLINK_RX

SB3

SB2

STLK_RX

STLK_TX

STLINK_TX

USB_DM
USB_DP

T_SWO

SWO

T_SWO

Red

_Green

2 1

3 4

LD1

LD_BICOLOR_CMS

R1 1K5

R2 100K

R18

100

R19

100

R17

0

R5 100

R20
100

R13 10K[N/A]

R9
100K

R6

100K

R16 10K

R14 4K7

R12 4K7

C2
100nFC5100nF

C3
20pF[N/A]

C21
10pF

C20
10pF

C4
100nF

U5V

USB_RENUMn

USB_RENUMn

R11

2K7

R10

4K7

+3V3_ST_LINK

+3V3_ST_LINK

+3V3_ST_LINK

+3V3_ST_LINK

+3V3_ST_LINK

+3V3_ST_LINK

+3V3_ST_LINK

PWR_EXT

+3V3_ST_LINK

VO

D1

BAT60JFILM

D2

BAT60JFILM

C18

1uF_X5R_0603

C17
10nF_X7R_0603

C16
1uF_X5R_0603

51

2

GND

3

4

BYPASS

INH

Vin Vout

U4 LD3985M33R

C15
100nF

C19
100nF

+3V3_ST_LINK

3

2

1

T1
9013

R4
10K

R3
36K

U5V

R8 100

+3V3_ST_LINK

E5V

E5V

VBAT

1

PA7

17

PC13

2

PA12

33

PC14

3

PB0

18

PC15

4

JTMS/SWDIO

34

OSCIN

5

PB1

19

OSCOUT

6

VSS_2

35

NRST

7

PB2/BOOT1

20

VSSA

8

VDD_2

36

VDDA

9

PB10

21

PA0

10

JTCK/SWCLK

37

PA1

11

PB11

22

PA2

12

PA15/JTDI

38

PA3

13

VSS_1

23

PA4

14

PB3/JTDO

39

PA5

15

VDD_1

24

PA6

16

PB4/JNTRST

40

PB12

25

PB5

41

PB13

26

PB6

42

PB14

27

PB7

43

PB15

28

BOOT0

44

PA8

29

PB8

45

PA9

30

PB9

46

PA10

31

VSS_3

47

PA11

32

VDD_3

48

U5
STM32F103CBT6

U5V

Ilim = 510mA
Isc= 1.2Ilim to 1.5Ilim = 612mA
to 765mA

R15
10K

U5V_ST_LINK

R7

2.7K

C6

4.7uF

C1
100nF

PWR_ENn

SB1

SWD

+3V3_ST_LINK

1 2
3 4
5

CN2

[N/A]

STM_JTMS
STM_JTCK

SB9

IN

1

IN

2

ON

3

GND

4

SET

5

OUT

6

OUT

7

FAULT

8

U1
ST890CDR

VBUS

1

DM

2

DP

3

ID

4

GND

5

Shield

6

USB_Micro-B receptacle

Shield

7

Shield

8

Shield

9

EXP

10

EXP

11

CN1

1050170001

34/37 UM1956 Rev 5

Figure 11. ST-LINK/V2-1

Electrical schematics UM1956

UM1956 Compliance statements

Appendix A Compliance statements

A.1 Federal Communications Commission (FCC) and Industry

Canada (IC) Compliance Statements

A.1.1 FCC Compliance Statement

Part 15.1936

This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.

Part 15.105

This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference's by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the receiver.

• Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Part 15.21

Any changes or modifications to this equipment not expressly approved by
STMicroelectronics may cause harmful interference and void the user's authority to operate
this equipment.

A.1.2 IC Compliance Statement

Compliance Statement

Industry Canada ICES-003 Compliance Label: CAN ICES-3 (B)/NMB-3(B).

Déclaration de conformité

Étiquette de conformité à la NMB-003 d'Industrie Canada : CAN ICES-3 (B)/NMB-3(B).

UM1956 Rev 5 35/37

36

Revision history UM1956

Revision history

Date Revision Revision Details

14-Oct-2015 1 Initial version.

21-Mar-2016 2

30-Jun-2016 3

23-Aug-2018 4

12-Nov-2018 5

Table 17. Document revision history

Update to introduce NUCLEO-L011K4. Updated Introduction,

Chapter 1: Features, Chapter 3: Ordering information,
Chapter 6: Hardware layout and configuration.

Added Appen

Updated In

Table 14: Arduino Nano connectors on NUCLEO-L432KC to

d NUCLEO-L432KC.

ad

Extended document scope to NUCLEO-L412KB:
– Updated In
– Updated Chap
– Added Ta

L412KB

– Extended Fig
Updated Chapter 1: Features, Chapter 2: Product marking,

and Section 5.2: System requirements

Updated document title with reference board identifier.
Extended document scope to NUCLEO-F301K8:
– Updated Introduction
– Updated Chapter 2: Product marking and Chapter 3:

Ordering information

– Added Ta ble 11: Arduino Nano connectors on NUCLEO-

F301K8

– Extended Figure 7 description

dix A: Compliance statements.

troduction, Chapter 3: Ordering information and

troduction

ter 3: Ordering information

ble 14: Arduino Nano connectors on NUCLEO-

ure 8 description

36/37 UM1956 Rev 5

UM1956

IMPORTANT NOTICE – PLEASE READ CAREFULLY

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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2018 STMicroelectronics – All rights reserved

UM1956 Rev 5 37/37

37