ST STM32U5 Nucleo-64 Manuel utilisateur
Introduction
The Nucleo-64 board based on the MB1841 reference board (NUCLEO-U545RE-Q) provides an affordable and flexible way
for users to try out new concepts and build prototypes by choosing from the various combinations of performance and power
consumption features, provided by the STM32U5 series microcontroller.
The ARDUINO® Uno V3 connectivity and the ST morpho headers provide easy expansion of the functionality of the STM32
Nucleo open development platform with a wide choice of specialized shields.
The STM32 Nucleo-64 board does not require any separate probe as it integrates the STLINK-V3EC debugger/programmer.
The STM32 Nucleo-64 board comes with the STM32 comprehensive free software libraries and examples available with the
STM32CubeU5 MCU Package.
Figure 1. Nucleo-64 board (top view)
Picture is not contractual.
STM32U5 Nucleo-64 board (MB1841)
UM3062
User manual
UM3062 - Rev 1 - April 2023
For further information contact your local STMicroelectronics sales office. www.st.com
1Features
• STM32 microcontroller in an LQFP 64‑pin package
• Internal SMPS(1) to generate Vcore logic supply, identified by '-Q' suffixed boards
• USB Type-C® sink device FS
• One user LED shared with ARDUINO® Uno V3
• RESET and USER push-buttons
• 32.768 kHz crystal oscillator
• Board connectors:
–USB Type-C®
–ARDUINO® Uno V3
– ST morpho extension pin headers for full access to all STM32 I/Os
• Flexible power-supply options: ST-LINK USB VBUS, user USB connector, or external sources
• On-board STLINK-V3EC debugger/programmer with USB re-enumeration capability: mass storage, Virtual
COM port, and debug port
• Comprehensive free software libraries and examples available with the STM32CubeU5 MCU Package
• Support of a wide choice of Integrated Development Environments (IDEs) including IAR Embedded
Workbench®, MDK-ARM, and STM32CubeIDE
1. SMPS significantly reduces power consumption in Run mode, by generating a Vcore logic supply from an internal DC/DC
converter.
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
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Features
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2Ordering information
To order the Nucleo-64, refer to Table 1. Additional information is available from the datasheet and reference
manual of the target STM32.
Table 1. Ordering information
Order code Board reference Target STM32 Differentiating feature
NUCLEO-U545RE-Q MB1841 STM32U545RET6Q
Microcontroller featuring
512 Kbytes of flash memory
and 274 Kbytes of SRAM
2.1 Products and codification
The meaning of the codification is explained in Table 1.
Table 2. Codification explanation
NUCLEO-XXYYZE-Q Description Example: NUCLEO-U545RE-Q
XX MCU series in STM32 Arm Cortex MCUs STM32U5 series
YY MCU product line in the series STM32U535/U545
ZSTM32 package pin count:
• R for 64 pins 64 pins
ESTM32 flash memory size:
• E for 512 Kbytes 512 Kbytes
-Q STM32 has an internal SMPS function SMPS
The order code is mentioned on a sticker placed on the top or bottom side of the board.
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Ordering information
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3Development environment
3.1 System requirements
• Multi‑OS support: Windows® 10, Linux® 64-bit, or macOS®
• USB Type-A or USB Type-C® to USB Type-C® cable
Note: macOS® is a trademark of Apple Inc., registered in the U.S. and other countries and regions.
Linux® is a registered trademark of Linus Torvalds.
Windows is a trademark of the Microsoft group of companies.
3.2 Development toolchains
•IAR Systems® - IAR Embedded Workbench®(1)
•Keil® - MDK-ARM(1)
• STMicroelectronics - STM32CubeIDE
1. On Windows® only.
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Development environment
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4Conventions
Table 3 provides the conventions used for the ON and OFF settings in the present document.
Table 3. ON/OFF convention
Convention Definition
Jumper JPx ON Jumper fitted
Jumper JPx OFF Jumper not fitted
Jumper JPx [1-2] Jumper fitted between Pin 1 and Pin 2
Solder bridge SBx ON SBx connections closed by 0 Ω resistor
Solder bridge SBx OFF SBx connections left open
Resistor Rx ON Resistor soldered
Resistor Rx OFF Resistor not soldered
Capacitor Cx ON Capacitor soldered
Capacitor Cx OFF Capacitor not soldered
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Conventions
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5Quick start
The STM32 Nucleo-64 board is a low-cost and easy-to-use development kit, to quickly evaluate and start
development with an STM32U5 series microcontroller in an LQFP 64‑pin package. Before installing and using
the product, accept the Evaluation Product License Agreement from the www.st.com/epla webpage. For more
information on the STM32 Nucleo-64 board and for the software example, visit the www.st.com/stm32nucleo
webpage.
5.1 Getting started
Follow the sequence below to configure the Nucleo-64 board and launch the demonstration application (refer to
Figure 4 and Figure 5 for component location):
1. Check the jumper position on the board (refer to Default board configuration).
2. Connect the Nucleo-64 board to a PC with a USB cable (USB Type-A or USB Type-C® to USB Type-C®)
through the USB connector (CN1) to power the board.
3. The 5V_PWR green (LD3), COM (LD1), and PWR (LD4) LEDs light up, and the green LED (LD2) blinks.
4. Press the blue user button (B1).
5. Observe how the blinking of the LED (LD2) changes, according to the clicks on the button (B1).
6. Download the demonstration software and several software examples that help to use the STM32
Nucleo-64 features. These are available on the www.st.com website.
7. Develop your application using the available examples.
5.2 Default board configuration
By default, the Nucleo-64 board is configured with VDD_MCU at 3.3 V. It is possible to configure the board with
VDD_MCU at 1.8 V. Before switching to 1.8 V, ensure that the extension module and external shield connected to
the Nucleo-64 board are 1.8 V compatible.
The default jumper configuration and voltage setting are shown in Table 4.
Table 4. Default jumper configuration
Jumper Definition Default position Comment
JP1 Debugger selection OFF STLINK-V3EC is selected as the default
debugger.
JP2 STLK_NRST OFF STLINK-V3EC MCU is not under the
Reset mode.
JP3 5V power selection [1-2] 5V from STLINK-V3EC (STLK)
JP4 IDD measurement ON VDD_MCU current measurement
JP5 VDD [1-2] VDD voltage selection 3.3 V
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Quick start
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Figure 2. Default board configuration
JP3 [1-2]
JP5 [1-2]
3V3
JP4 [1-2]
STM32
microcontroller
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Default board configuration
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Table 5 explains the different jumper settings and configurations.
Table 5. Jumper configuration
Jumper Definition Setting(1) Comment
JP1 Debugger selection
[1-2]
An external debugger can be used on
the MIPI10 connector (CN4). The level
shifter (U2) is in high-Z. STLINK-V3EC
no longer drives the embedded STM32.
OFF STLINK-V3EC is selected as the
default debugger.
JP2 STLK_NRST
[1-2]
Can be used to reset the STLINK-V3EC
MCU when an external debug probe is
used. Thanks to the U2 level shifter and
JP1, it is not necessary to put STLINK-
V3EC in Reset mode when using an
external debug probe.
OFF Normal mode: Onboard STLINK-V3EC
debugger used
JP3 5V power selection(2)
[1-2] 5V source from STLINK-V3EC (CN1)
[3-4] 5V source from ARDUINO® VIN 7‑12 V
from CN6 or CN7
[5-6] 5V source from external 5V (E5V) from
CN6 or CN7
[7-8] 5V source from ST-LINK in USB charger
mode without USB negociation (CN1)
[9-10] 5V source from user USB Type-C®
(CN3)
OFF No 5V power source. Configuration
applied when external 3.3 V is used.
JP4 IDD measurement
ON VDD_MCU = VDD (3.3 or 1.8 V,
depending on JP5)
OFF
An ammeter is used to measure
VDD_MCU power consumption or a
3.3 or 1.8 V external source can
be connected on pin 2 (STLINK-PWR
tools with STM32CubeMonitor-Power or
ULPBench probe as examples)
JP5 VDD
[1-2] VDD voltage selection is 3V3 power
source.
[2-3] VDD voltage selection is 1V8 power
source
OFF No internal VDD power supply (3.3 or
1.8 V external voltage needed on pin 2)
1. The default configuration is in bold.
2. It is recommended to have only one jumper configuration.
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Default board configuration
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6Hardware layout and configuration
The STM32 Nucleo-64 board is designed around an STM32U5 microcontroller in an LQFP 64‑pin package.
Figure 3 shows the connections between the STM32 and its peripherals (STLINK-V3EC, push‑buttons, LEDs,
USB, ARDUINO® connectors, and ST morpho headers). Figure 4 and Figure 5 show the location of these
features on the STM32 Nucleo-64 board.
The mechanical dimensions of the board are shown in Figure 6.
Figure 3. Hardware block diagram
STLK-V3EC
STM32 MCU
OSC_32
SWD
32 KHz
crystal
VCP
UART
GPIOs
GPIO
LD2
GPIO
Embedded
STLK-V3EC
SWD
VCP
UART
USB-C®
connector
B1
User B2
RST
ARDUINO®
ST morpho
GPIO
ARDUINO®
ST morpho
5V
PWR SEL
LD3
5V
PWR
JP1 Debug
SEL
JP2 STLK
NRST
STDC14
MIPI10
COM
LS
LS
3V3 / JP5 / 1V8JP4 IDD
USB-C®
connector
ARDUINO®
ARDUINO®
Note: • LS: Level Shifter
• VCP: Virtual COM port
• SWD: Serial Wire Debug
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Hardware layout and configuration
UM3062 - Rev 1 page 9/45
6.1 Nucleo-64 board layout
Figure 4. Nucleo-64 board top layout
STM32
microcontroller
STLK_NRST
(JP2)
USB STLINK-V3EC
(CN1)
Debugger selection
(JP1)
MIPI10
(CN14)
User button
(B1)
ST morpho connector
(CN7)
IDD jumper
(JP4)
STLK PWR LED
(LD4)
STLK COM LED
(LD1)
5V LED
(LD3)
5V jumper selection
(JP3)
Reset button
(B1)
ST morpho connector
(CN10)
VDD selection 3V3/1V8
(JP5)
ARDUINO® D[7-0]
(CN9)
USB-C® 5V LED
(LD6)
ARDUINO® D[15-8]
(CN5)
USB-C® connector
(CN3)
ARDUINO® ADC
(CN8)
ARDUINO® Power
(CN6)
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Nucleo-64 board layout
UM3062 - Rev 1 page 10/45
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