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UM3062
User manual
STM32U5 Nucleo-64 board (MB1841)
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.
UM3062 - Rev 1 - April 2023
For further information contact your local STMicroelectronics sales office.
www.st.com
Page 2
1 Features
• STM32 microcontroller in an LQFP 64‑pin package
• Internal SMPS
• 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 V
• 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 V
converter.
(1)
to generate V
®
logic supply, identified by '-Q' suffixed boards
core
, user USB connector, or external sources
BUS
core
UM3062
Features
logic supply from an internal DC/DC
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
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2 Ordering information
To order the Nucleo-64, refer to Table 1. Additional information is available from the datasheet and reference
manual of the target STM32.
Order code Board reference Target STM32 Differentiating feature
NUCLEO-U545RE-Q MB1841 STM32U545RET6Q
2.1 Products and codification
The meaning of the codification is explained in Table 1.
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
Z
E
-Q STM32 has an internal SMPS function SMPS
STM32 package pin count:
• R for 64 pins
STM32 flash memory size:
• E for 512 Kbytes
UM3062
Ordering information
Table 1. Ordering information
Microcontroller featuring
512 Kbytes of flash memory
and 274 Kbytes of SRAM
Table 2. Codification explanation
64 pins
512 Kbytes
The order code is mentioned on a sticker placed on the top or bottom side of the board.
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3 Development 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:
3.2 Development toolchains
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.
•
IAR Systems® - IAR Embedded Workbench
•
Keil® - MDK-ARM
• STMicroelectronics - STM32CubeIDE
1.
On Windows® only.
(1)
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Development environment
®
®(1)
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4 Conventions
Table 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
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
Table 3. ON/OFF convention
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5 Quick 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.
UM3062
Quick start
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
JP1 Debugger selection OFF
JP2 STLK_NRST OFF
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
Definition Default position Comment
STLINK-V3EC is selected as the default
debugger.
STLINK-V3EC MCU is not under the
Reset mode.
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Figure 2. Default board configuration
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Default board configuration
JP3 [1-2]
JP4 [1-2]
STM32
microcontroller
JP5 [1-2]
3V3
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Table 5 explains the different jumper settings and configurations.
Table 5. Jumper configuration
Jumper Definition
JP1 Debugger selection
JP2 STLK_NRST
Setting
[1-2]
OFF
[1-2]
OFF
[1-2] 5V source from STLINK-V3EC (CN1)
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Default board configuration
(1)
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.
STLINK-V3EC is selected as the
default debugger.
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 STLINKV3EC in Reset mode when using an
external debug probe.
Normal mode: Onboard STLINK-V3EC
debugger used
Comment
JP3
5V power selection
(2)
JP4 IDD measurement
JP5 VDD
1. The default configuration is in bold.
2. It is recommended to have only one jumper configuration.
[3-4]
[5-6]
[7-8]
[9-10]
OFF
ON
OFF
[1-2]
[2-3]
OFF
5V source from ARDUINO® VIN 7‑12 V
from CN6 or CN7
5V source from external 5V (E5V) from
CN6 or CN7
5V source from ST-LINK in USB charger
mode without USB negociation (CN1)
5V source from user USB Type-C
®
(CN3)
No 5V power source. Configuration
applied when external 3.3 V is used.
VDD_MCU = VDD (3.3 or 1.8 V,
depending on JP5)
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)
VDD voltage selection is 3V3 power
source.
VDD voltage selection is 1V8 power
source
No internal VDD power supply (3.3 or
1.8 V external voltage needed on pin 2)
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6 Hardware 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
UM3062
Hardware layout and configuration
STLK-V3EC
MIPI10
STDC14
JP1 Debug
SEL
LS
LS
®
ARDUINO
JP2 STLK
NRST
SWD
UART
VCP
Embedded
STLK-V3EC
B1
User
VCP
UART
GPIO
STM32 MCU
®
USB-C
connector
B2
RST
3V3 / JP5 / 1V8JP4 IDD
SWD
GPIO
LD2
PWR
5V
COM
LD3
5V
PWR SEL
®
ARDUINO
UM3062 - Rev 1
ST morpho
®
ARDUINO
USB-C
connector
Note: • LS: Level Shifter
• VCP: Virtual COM port
• SWD: Serial Wire Debug
ST morpho
GPIO
OSC_32
32 KHz
crystal
®
GPIOs
®
ARDUINO
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Page 10
6.1 Nucleo-64 board layout
UM3062
Nucleo-64 board layout
Figure 4. Nucleo-64 board top layout
Debugger selection
(JP1)
MIPI10
(CN14)
User button
(B1)
ST morpho connector
(CN7)
IDD jumper
(JP4)
ARDUINO
®
Power
(CN6)
ARDUINO
®
ADC
(CN8)
STLK_NRST
(JP2)
STM32
microcontroller
USB STLINK-V3EC
(CN1)
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[15-8]
(CN5)
ARDUINO
®
D[7-0]
(CN9)
USB-C
®
connector
(CN3)
USB-C
(LD6)
®
5V LED
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SN sticker
CPN sticker
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Nucleo-64 board layout
Figure 5. Nucleo-64 board bottom layout
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6.2 Mechanical drawing
Figure 6. Nucleo-64 board mechanical drawing (in millimeters)
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Mechanical drawing
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6.3 Embedded STLINK-V3EC
The chapter below gives some information about the implementation of the STLINK-V3EC on this Nucleo-64
board. For details information about ST-LINK capabilities, LED management, driver, and firmware for this
STLINK-V3EC, refer to the technical note Overview of ST-LINK derivatives (TN1235).
For information about the debugging and programming features of STLINK-V3EC, refer to the user manual
STLINK-V3SET debugger/programmer for STM8 and STM32 (UM2448).
6.3.1 Description
There are two different ways to program and debug the onboard STM32 MCU:
• Using the embedded STLINK-V3EC
• Using an external debug tool connected to the STDC14/MIPI10 connector (CN4)
Refer to Table 5. Jumper configuration to switch between STLINK-V3EC and STDC14 configuration.
The STLINK-V3EC facility for debugging and flashing is integrated into the STM32 Nucleo-64.
Features supported in STLINK-V3EC:
•
5 V/500m A power supplied by the USB Type-C® connector (CN1)
• USB 2.0 high-speed-compatible interface
• JTAG and Serial Wire Debug (SWD) with Serial Wire Viewer (SWV)
• Virtual COM port (VCP)
• 1.7 to 3.6 V application voltage
• COM status LED which blinks during communication with the PC
• Power status LED which gives information about STLINK-V3EC target power
• USB-C® over‑voltage protection (U5) with current limitation
Two tricolor LEDs (green, orange, and red) provide information about the STLINK-V3EC communication status
(LD1) and STLINK-V3EC power status (LD4). For details information about these LEDs, refer to the technical
note Overview of ST-LINK derivatives (TN1235).
Two level shifters are used on VCP and SWD interfaces to offer a debug capability with MCU powered by a 1.8 V
power source. The level shifters are used for signals from Target MCU (1.8/3.3 V) to STLINK-V3EC (3.3 V).
One of the level shifters is enabled with a jumper called debugger selection (JP1) to isolate the output I/Os from
STLINK-V3EC when an external debug probe is used.
The configuration of this jumper (JP1) to use an external debug probe is explained in Table 5. Jumper
configuration.
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Embedded STLINK-V3EC
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6.3.2 Drivers
The driver installation is not mandatory since Windows® 10 but allocates an ST-specific name to the ST-LINK
COM port in the system device manager.
For details information on the ST-LINK USB driver, refer to the technical note Overview of ST-LINK derivatives
(TN1235).
6.3.3 STLINK-V3EC firmware upgrade
The STLINK-V3EC embeds a firmware upgrade (stsw_link007) mechanism through the USB port. As the
firmware might evolve during the lifetime of the STLINK-V3EC product, to add new functionalities, fix bugs, and
support new microcontroller families, it is recommended to visit the www.st.com website before starting to use the
STM32 Nucleo-64 board and periodically, to stay up-to-date with the latest firmware version.
For details information about firmware upgrades, refer to the technical note Overview of ST-LINK derivatives
(TN1235).
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Embedded STLINK-V3EC
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6.3.4 Using an external debug tool to program and debug the on-board STM32
To support an external debug tool, set the jumper (JP1) to isolate the output I/O from STLINK-V3EC. Then
connect the external debug tool through the STDC14/MIPI10 debug connector (CN4).
When using the external debug connector (CN4), it is possible to use the STLINK-V3EC USB connector (CN1) to
supply the Nucleo-64 board or select another power supply source as described in Section 6.4 Power supply and
power selection.
Figure 7. Connecting an external debug tool to program the on-board STM32 microcontroller
UM3062
Embedded STLINK-V3EC
STLK_NRST (JP2)
Debugger selection (JP1)
MIPI10 (CN4)
STM32
microcontroller
USB STLINK-V3EC (CN1)
STLK PWR LED (LD4)
STLK COM LED (LD1)
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Page 16
Figure 8 shows the STDC14/MIPI10 connector (CN4).
Figure 8. STDC14/MIPI10 debug connector (CN4)
STDC14/MIPI10
(CN4)
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Embedded STLINK-V3EC
Table 6. STDC14/MIPI10 debug connector (CN4) pinout
describes the STDC14/MIPI10 connector (CN4) pinout.
Table 6. STDC14/MIPI10 debug connector (CN4) pinout
MIPI10 pin
- 1 NC
- 2 NC
1 3 VDD
2 4 T_SWDIO
3 5 GND Ground
4 6 T_SWCLK
5 7 GND Ground
6 8 T_SWO
7 9 NC
8 10 T_JTDI Not used by SWD protocol, target JTDI (T_JTDI) using JTAG protocol
9 11 GNDDetect
10 12 T_NRST
- 13 T_VCP_RX
- 14 T_VCP_TX
1. Not connected on the Nucleo-64 board
2. Output for the Nucleo-64 board
3. SWO is optional and required only for Serial Wire Viewer (SWV) trace.
4. Optional loopback of JTCK on the target side
5. NC means not required for the SWD connection, or not connected on the Nucleo-64 board
6. Tied to GND, it might be used by the external debugger.
7. Input for the Nucleo-64 board
STDC14 pin CN4 Function
Reserved
Reserved
Target VDD
(1)
(1)
(2)
Target SWDIO using SWD protocol or target JTMS (T_JTMS) using
JTAG protocol
Target SWCLK using SWD protocol or target JTCK (T_JTCK) using
JTAG protocol
Target SWO using SWD protocol or target JTDO (T_JTDO) using JTAG
protocol (SB44 ON)
T_JRCLK
(4)
GND detection for plug indicator
/NC
(3)
(5)
(6)
Target NRST using SWD protocol or target JTMS (T_JTMS) using
JTAG protocol
Target RX used for VCP (with UART supporting bootloader)
Target TX used for VCP (with UART supporting bootloader)
(7)
(2)
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6.4 Power supply and power selection
6.4.1 External power supply input
It is possible to configure the Nucleo-64 board to use any of the following power sources:
• STLK: 5 V from STLINK-V3EC USB-C® connector (CN1)
• VIN: 7 to 12V from ARDUINO® (CN6) or ST morpho connector (CN7), with 5 V adaptation from LDO (U16)
• E5V: External 5 V power from ST morpho connector (CN7)
• CHGR: 5 V from STLINK-V3EC USB (CN1) without USB enumeration
• USB_USER: 5 V from user USB Type-C® connector (CN3)
•
3V3 on ARDUINO® (CN6) or ST morpho connector (CN7).
If VIN, E5V, or 3V3 is used to power a Nucleo-64 board, this power source must comply with the standard
EN‑60950‑1: 2006+A11/2009 and must be safety extra‑low voltage (SELV) with limited power capability.
The power supply capabilities are summarized in Table 7.
Table 7. Power sources capability
UM3062
Power supply and power selection
Input power name Connector pins Voltage range
STLK
VIN / VIN_5V
E5V
CHGR
USB_USER
3V3
VDD JP5 pin 2 1.71 to 3.6 V -
CN1
JP3[1-2]
CN6 pin 8
CN7 pin 24
JP3[3-4]
CN7 pin 6
JP3[5-6]
CN1 pin 1
JP3[7-8]
CN3
JP3[9-10]
CN6 pin 4
CN7 pin 16
4.75 to 5.5 V 500 mA
7 to 12 V 800 mA
4.75 to 5.5 V 1 A
4.75 to 5.5 V 500 mA
4.75 to 5.5 V 1 A
3.0 to 3.6 V -
Max.
current
Limitation
The maximum current depends on the presence or
absence of USB enumeration:
• 100 mA without enumeration
• 500 mA with enumeration OK.
From 7V to 12V only and input current capability is
linked to input voltage:
• 800 mA input current when Vin=7V
• 450 mA input current when 7V<Vin<9V
250 mA input current when 9V<Vin<12V
The maximum current depends on the power
source. 1 A maximum is recommended for this
Nucleo-64 board.
The maximum current depends on the used wall
charger to power the Nucleo-64 board. No USB
enumeration.
The maximum current depends on the USB Host
used to power the Nucleo-64 board. 1 A maximum
is recommended for this Nucleo-64 board.
The maximum current depends on the 3V3 source.
The 3V3 can be used when the STLINK-V3EC part
of the PCB is not used. SB8 might be OFF to
protect LDO (U15).
It is possible to power only the MCU power
supplies pins by applying a voltage source on JP5
pin 2. In this case, only the MCU is power. External
functions like debug, LED, or expansion connector
are not powered. This option can be used for the
MCU power consumption measurement.
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Power supply and power selection
STLK is a 5 V DC power with limitations from the STLINK-V3EC USB connector (CN1). In this case, the 5V
jumper selection (JP3) must be on pin [1-2] to select the STLK power source on the JP3 connector. This is
the default setting. If the USB enumeration succeeds, the STLK power is enabled, by asserting the T_PWR_EN
signal from STLINK-V3EC. This pin is connected to over‑voltage protection (U5) with the management of the
maximum current delivery.
The Nucleo-64 board and its shield can be powered from the STLINK-V3EC USB connector (CN1), but only the
STLINK-V3EC circuit is powered before USB enumeration because the host PC only provides 100 mA to the
board at that time. During the USB enumeration, the Nucleo-64 board requests 500 mA power from the host PC.
• If the host can provide the required power, the U5 power switch is enabled, the green LED (LD3) is turned
ON, and the Nucleo-64 board and its shield can consume up to 500 mA.
• If the host is not able to provide the requested current, the enumeration fails. the U5 power switch remains
OFF and the MCU part including the extension board is not powered. As a consequence, the green LED
(LD3) remains OFF. In this case, it is recommended to use an external 5 V power source.
STLK configuration: 5V jumper selection JP3[1-2] must be connected as shown in Figure 9.
Figure 9. 5V jumper selection JP3[1-2]: STLK power source
USB STLINK-V3EC
(CN1)
5V LED
(LD3)
5V_STLK selection
(JP3 [1-2])
STM32
microcontroller
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Power supply and power selection
VIN (VIN_5V) is the 7 to 12 V DC power source from the ARDUINO® connector (CN6) pin 8 (VIN), or from
the ST morpho connector (CN7) pin 24. The 5V jumper selection (JP3) must be on pin [3‑4] to select VIN_5V
power source. In that case, the DC power can come from the ARDUINO® Uno V3 battery shield (compatible with
Adafruit PowerBoost 500 shield).
An LDO (U16) is used to provide a fixed 5 V from VIN (7-12V).
VIN_5V configuration: 5V jumper selection (JP3) [3-4] must be connected as shown in Figure 10.
Figure 10. 5V jumper selection JP3[3-4]: VIN_5V power source
5V LED
(LD3)
VIN/VIN_5V
selection
(JP3 [3-4])
ST morpho connector
ARDUINO
®
Power connector
(CN7 – Pin 24)
(CN6 – Pin 8)
STM32
microcontroller
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Power supply and power selection
E5V is the DC power coming from an external 5 V dc power source from the ST morpho connector (CN7) pin 6.
The 5V jumper selection (JP3) must be on pin [5-6] to select the E5V power source on the JP3 connector and
must be connected as shown in Figure 11. 5V jumper selection JP3[5-6]: E5V power source.
Figure 11. 5V jumper selection JP3[5-6]: E5V power source
5V LED (LD3)
E5V selection
(JP3 [5-6])
ST morpho connector
(CN7 – Pin 6)
STM32
microcontroller
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Power supply and power selection
CHGR is when a DC power charger is connected to the USB STLINK-V3EC (CN1). To select the CHGR power
source, the 5V jumper selection (JP3) must be on pins [7-8]. If an external USB charger powers the Nucleo-64
board, then the debugging feature through (CN1) is not available. With this configuration, the voltage and current
limitations are no more effective. If a host computer is connected instead of the charger, it is recommended to
select the STLK power source.
CHGR configuration: 5V jumper selection JP3[7-8] must be connected as shown in Figure 12.
Figure 12. 5V jumper selection JP3[7-8]: CHGR power source
USB STLINK-V3EC
(CN1)
5V LED
(LD3)
CHGR selection
(JP3 [7-8])
STM32
microcontroller
Note: With this JP3 configuration: the USB_PWR protection is bypassed. This configuration is forbidden to power the
board with a computer USB port, as the USB_PWR_protection is bypassed. The reason is that if the board
consumes more than 500 mA, it can damage the computer.
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Power supply and power selection
USB_USER is the DC power source coming from the 5 V of the USB Type-C® connector (CN3). The 5V jumper
selection (JP3) must be on pins [9-10] and must be connected as shown in Figure 13.
Figure 13. 5V jumper selection JP3[9-10]: USB USER power source
5V LED
(LD3)
USB user
selection
(JP3 [9-10])
STM32
microcontroller
USB user
connector
(CN3)
USB user
5V LED
(LD6)
External 3V3 power supply input. In some situations, it is interesting to use an external 3.3 V source on the
3V3 input (CN6 pin 4, CN7 pin 16), for instance in case the 3.3 V is provided by an extension board. When the
Nucleo-64 is powered with only a 3.3 V source, STLINK-V3EC is not powered thus programming and debugging
are unavailable.
When using the 3V3 input the STLINK-V3EC part is not supplied
For this configuration, it is recommended to remove SB8 to avoid backward voltage to 5V through U15.
VDD power supply input. In some situations, it is interesting to use an external power source from 1.71 to
3.6 V to power only the MCU power supply pins (JP5 pin 2 or JP4 pin 2). In this configuration, external functions
like debug, LED, or expansion connector are not powered. This option can be used to optimize MCU power
consumption measurement.
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Power supply and power selection
6.4.2 Programing/debugging when the power supply is not from STLINK-V3EC (STLK)
In case the current consumption of the Nucleo-64 and the expansion boards exceeds the allowed current on
the ST-LINK USB connector, the external power VIN, E5V, or USB-USER can be used. In such a case, it is still
possible to use the embedded ST-LINK for VCP, programming and debugging.
In this case, the following power sequence procedure must be respected:
1. Set the JP3 jumper according to the 5V selected external power source.
2. Connect the external power source according to JP3.
3. Power ON the external power supply.
4. Check that the 5 V green LED (LD3) is turned ON.
5. Connect the PC to the USB connector (CN1) for programming/debugging.
If this sequence is not respected, the board might be powered by V
first from STLINK-V3EC, and the following
BUS
risk might be encountered:
• If more than 500 mA current is needed by the board, the PC might be damaged or the current can be
limited by the PC. Therefore, the board is not powered correctly.
• 500 mA is requested at enumeration, so there is a risk that the request is rejected, and enumeration does
not succeed if PC cannot provide such current.
Consequently, the board is not powered, and the 5 V green LED (LD3) remains OFF.
6.4.3 Power supply output
• 5V: Whatever the power source (STLK, VIN_5V, E5V, CHGR, or USB-USER), the 5V generated is present
on CN6 pin 5 or CN7 pin 18, and can be used as an output power supply for an ARDUINO® shield or an
extension board. In this case, the maximum current of the power source specified in Table 7 needs to be
respected.
• 3V3: The internal 3V3, on CN6 pin 4 or CN7 pin 16, can be used also as power supply output. The current
is limited by the maximum current capability of the U15 regulator (500 mA maximum concerning STM32
Nucleo-64 board with shields consumption).
UM3062
6.4.4 Internal power supply
The Nucleo-64 boards are designed to support two specific voltage configurations:
• VDD at 3.3 V configuration to reach the Nucleo-64 low-power mode
• VDD at 1.8 V configuration to demonstrate the MCU low-voltage capability
6.4.4.1 3V3
Regardless of the 5V power source, an LDO is used to deliver a fixed 3.3 V power voltage from 5V. The maximum
current capability of this source is 500 mA. To select the 3.3 V voltage for the VDD, set the JP5 jumper on [1‑2].
A solder bridge (SB8) is used to disconnect the LDO output when an external 3.3 V is applied to the Nucleo-64
board, to avoid backward voltage to 5V through this LDO.
• SB8 ON: U15 LDO output provides a 3.3 V power supply (default configuration).
• SB8 OFF: U15 LDO output does not provide 3.3 V. An external 3.3 V is needed.
6.4.4.2 1V8
An external SMPS can be used for the MCU to work at 1.8 V. The external SMPS capability is 400 mA maximum.
Before using the 1.8 V voltage it is necessary to check that all interfaces connected to the Nucleo-64 board are
1.8 V compatible. To select the 1.8 V for the VDD, connect the VDD jumper (JP5) to the pin [2-3].
In this mode, it is possible to keep some MCU voltage domains on 3.3 V depending on the application use case.
The MCU voltage selection is done according to the solder bridge configuration. Refer to Table 8 for solder bridge
configuration.
UM3062 - Rev 1
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Page 24
6.4.4.3 JP5 VDD voltage selection 1V8/3V3 power sources
The JP5 jumper selects the VDD voltage:
• Set JP5 on [1-2] to set VDD to 3.3 V.
• Set JP5 on [2-3] to set VDD to 1.8 V.
The consumption on this jumper includes the MCU power pins connected to the VDD_MCU power line and the
other features supplied by VDD, such as the level shifter power supply pins for STLINK-V3EC, the user button,
ARDUINO® shield on the IOREF pin, and power supply pins on the ST morpho connector.
6.4.5 MCU power supply
The default configuration of the MCU power pins is described in Table 8.
Table 8. MCU power configuration
UM3062
Power supply and power selection
Solder bridge
configuration
JP5[1‑2]/JP5[2‑3] VDD selection: Jumper selection for VDD 3V3 or 1V8
JP4[12]/ammeter IDD: JP4 ON to supply the MCU or connected with an ammeter to do the current measurement.
SB27 ON SB for VDDSMPS input voltage
SB13 ON SB for VDDA input voltage
SB33 ON
SB25 ON SB for VBAT input voltage
SB for VDDUSB input voltage (directly on 3V3 because VDDUSB is not compatible with 1V8
configuration)
MCU power supply
Warning: On this Nucleo-64 board, the power‑on sequence implementation for the 1.8 V use case is
given as an example and might not follow the recommended power‑on sequencing. Refer
to the application note Getting started with STM32U5 series MCU hardware development
(AN5373) and STM32U5xx product datasheets for power on sequencing.
INTERNAL V
The power figures in the Run mode are significantly improved, by generating the V
SMPS power supply
CORE
logic supply from the
core
internal DC/DC converter (this function is only available on '-Q' suffixed boards).
For all general information concerning design recommendations for STM32U5 with internal SMPS and design
guide for ultra‑low‑power applications with performance, refer to the application note Getting started with
STM32U5 series MCU hardware development (AN5373) at the www.st.com website.
6.4.6 VDD_MCU IDD measurement
The labeled IDD jumper (JP4) is used to measure the consumption of the STM32 microcontroller by removing the
jumper and by connecting an ammeter or any other current measurement tool.
• Jumper ON: STM32 microcontroller is powered (default).
• Jumper OFF: An ammeter or external 3.3V power source must be connected to power and measure the
STM32 microcontroller consumption.
The IDD jumper can be used to perform the current consumption for both 3.3 and 1.8 V MCU voltages.
UM3062 - Rev 1
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Page 25
6.5 LEDs
STLINK-V3EC tricolor LEDs (LD1 and LD4)
The tricolor (green, orange, and red) LEDs provide information about STLINK-V3EC communication status (LD1)
and power status (LD4). For detailed information about these LEDs, refer to the technical note Overview of
ST-LINK derivatives (TN1235).
User green LED (LD2)
The user green LED (LD2) is connected to the STM32 I/O PA5 (SB10 ON, default configuration) also used for
ARDUINO® D13 function. A transistor is used to drive the LED whatever the MCU 1V8 or 3V3 voltage range is.
5V PWR LED (LD3)
The green LED (LD3) indicates that the Nucleo-64 board is powered by a 5 V source, and this source is available
on CN6 pin 5 and CN7 pin 18, but also for the LDO and external SMPS input.
USB Type-C® LED (LD6)
The green LED (LD6) shows the presence of 5 V on the USB-USER connector. Refer to Section 6.11 USB Type-
C® FS for more details.
UM3062
LEDs
6.6 Push-buttons
Two buttons are available on the Nucleo-64 board.
USER button (B1)
The blue button for the user and wake‑up functions is connected to PC13 to support the default TAMPER function
or to PA0 to support the optional wake‑up function of the STM32 microcontroller. When the button is pressed the
logic state is HIGH, otherwise, the logic state is LOW.
• To connect the USER button to PC13, SB24 must be ON and SB23 must be OFF. This is the default
configuration.
• To connect the USER button to PA0, SB24 must be OFF and SB23 must be ON. This is the optional
configuration.
The USER button is implemented using a firmware debounce filter. This helps to reduce the BOM cost by
removing the external hardware debounce filter R48 and C72.
Warning: PC13 I/O used for the USER button must be set in INPUT, pull
RESET button (B2)
The black button connected to NRST is used to reset the STM32 microcontroller. When the button is pressed the
logic state is LOW, otherwise, the logic state is HIGH.
The blue and black plastic hats placed on these push-buttons can be removed if necessary when a shield or
an application board is plugged into the top of the Nucleo-64 board. This avoids pressure on the buttons and
consequently a possible permanent target MCU reset.
‑
down (PD) with debouncing.
Never set the PC13 in OUTPUT level LOW to avoid a shortcut when the USER button is
pressed.
UM3062 - Rev 1
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Page 26
6.7 OSC clock sources
Three clock sources are available on the Nucleo-64 board:
• LSE is the 32.768 kHz crystal for the STM32 embedded RTC.
• MCO is the 8 MHz clock from STLINK-V3E MCU for the STM32 microcontroller.
• HSE is the 16 MHz oscillator for the STM32 microcontroller. This clock is available depending on the target
STM32 Series microcontroller used on the Nucleo-64 board.
To help select the crystals and their associated capacitors, refer to the application note Oscillator design guide for
STM8AF/AL/S, STM32 MCUs and MPUs (AN2867).
6.7.1 LSE: OSC 32 KHz clock supply
There are three ways to configure the pins corresponding to the low-speed clock (LSE):
LSE on-board oscillator X3 crystal (default configuration)
For example, the X3 crystal embedded in the Nucleo-64 has the following characteristics: 32.768 kHz, 9 pF,
20 ppm, and reference NX1610SE‑ 32.768KHZ‑EXS00A‑ MU01499 manufactured by NDK.
To use the embedded X3 crystal, the following SB configuration is needed:
• SB1 and SB2 ON
• SB18 and SB22 OFF
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OSC clock sources
External oscillator connected to PC14 input
From the external oscillator through pin 25 of the ST morpho connector (CN7). The following configuration is
needed:
• SB1 and SB2 OFF
• SB18 and SB22 ON, for connection from ST morpho connector CN7 pin 25
LSE not used
PC14 and PC15 are used as GPIOs instead of low‑speed clocks. The following configuration is needed:
• SB1 and SB2 OFF
• SB18 and SB22 ON
6.7.2 OSC clock supply
There are four ways to configure the pins corresponding to the external high‑speed clock (HSE):
HSE: on-board oscillator X2 crystal (default: not connected)
For example, the X2 crystal embedded in the Nucleo-64 has the following characteristics: 16 MHz, 8 pF, 20 ppm.
The reference is NX2016SA_16MHz_EXS00A-CS07826 manufactured by NDK.
To use the embedded X2 crystal, the following SB configuration is needed:
• SB19 and SB21 OFF. PH0 and PH1 are not connected to CN7 as I/O.
• SB20 (MCO) OFF
• SB3 and SB4 ON are connected to use the external crystal.
UM3062 - Rev 1
MCO from STLINK-V3EC (default: not connected):
The MCO output of STLINK-V3EC MCU is used as an input clock. This frequency cannot be changed. It is fixed
at 8 MHz and connected to PH0 OSC_IN of the STM32 microcontroller. To use this clock source, the following
configuration is needed:
• SB19 OFF and SB21 ON. Only PH1 can be connected to CN7 as I/O.
• SB20 ON: MCO is connected to PH0 and R8 on the STLINK-V3EC side must be connected to provide the
MCO from the STLINK-V3EC output. The resistor (R7) and capacitor (C6) can be adapted for the 8 Mhz
shape. SB20 OFF.
• SB3 and SB4 OFF. The external crystal is disconnected from PH0 and PH1.
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Page 27
External oscillator to PH0 input (default: not connected)
The input clock comes from an external oscillator through PH0, CN17 pin 29. The following configuration is
needed:
• SB19 and SB21 ON. PH0 and PH1 are connected to CN7 (PH1 can be used as a GPIO).
• SB20 OFF. MCO is not connected to PH0.
• SB3 and SB4 OFF. The external crystal is disconnected from PH0 and PH1.
HSE not used (default configuration)
PH0 and PH1 are used as GPIOs instead of crystal input. The following configuration is needed:
• SB19 and SB21 ON. PH0 and PH1 are connected to expansion connector CN7 as GPIOs.
• SB20 OFF. MCO is not connected to PH0.
• SB3 and SB4 OFF. The external crystal X2 is disconnected from PH0 and PH1.
6.8 Reset sources
The reset signal NRST of the Nucleo-64 board is active LOW and the reset sources come from:
• The RESET button (B2)
• The embedded STLINK-V3EC
•
The ARDUINO® connector (CN6) pin 3
• The ST morpho connector (CN7) pin 14
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Reset sources
6.9
Virtual COM port (VCP)
An STM32 serial interface is connected to the STLINK-V3EC debug interface. The user can choose between a
USART or an LPUART interface.
The selection between USART and LPUART is performed by setting related solder bridges.
Refer to the two tables below to set the USART or LPUART connection to the VCP interface.
Table 9. USART1 LPUART1 connection
ST-LINK and ARDUINO
USART1 (PA9/PA10) connected
to STLINK-V3EC VCP
and
LPUART1 (PA2/PA3) connected
to ARDUINO® Uno V3 D0/D1
LPUART1 (PA2/PA3) connected to
STLINK-V3EC VCP
and
USART1 (PA9/PA10) connected to
ARDUINO® Uno V3 D0/D1
1. The default configuration is in bold.
configuration
By default:
• The serial communication between the target MCU and ST-LINK MCU is enabled on USART1 because this
interface supports the Bootloader mode.
• The serial communication between the target MCU and ARDUINO® Uno V3 or ST morpho connector is
enabled on LPUART1, not to interfere with the VCP interface.
®
UART
Solder bridge configuration
SB15, SB17, SB35, and SB37
ON
SB16, SB26, SB34, and SB36
OFF
SB16, SB26, SB34, and SB36 ON
SB15, SB17, SB35, and SB37
OFF
(1)
Feature
USART1 (PA9/PA10) connected to STLINK-V3EC
VCP
LPUART1 (PA2/PA3) connected to ARDUINO
Uno V3 D0/D1
LPUART1 (PA2/PA3) connected to STLINK-V3EC
VCP
USART1 (PA9/PA10) connected to ARDUINO® Uno
V3 D0/D1
®
UM3062 - Rev 1
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Page 28
6.10 Bootloader
The bootloader is located in the system memory, programmed by ST during production. It is used to reprogram
the flash memory via USART, I2C, SPI, CAN FD, or USB FS in device mode through the device firmware upgrade
(DFU). The bootloader is available on all devices. Refer to the application note STLINK-V3SET debugger/
programmer for STM8 and STM32 (AN2606) for more details.
The Root Secure Services (RSS) are embedded in a secured system memory area, programmed during ST
production. For example, it enables secure firmware installation (SFI), thanks to the RSS extension firmware
(RSSe SFI). This feature allows customers to protect the confidentiality of the firmware to be provisioned into the
STM32 when production is subcontracted to an untrusted third party. The RSS is available on all devices, after
enabling the TrustZone® through the TZEN option bit.
The bootloader version can be identified by reading the bootloader ID at the 0x0BF99EFE address.
The I/O PH3_BOOT0 gives external hardware access to the bootloader.
By default, this pin is set to level “0” (pull‑down resistor), to boot on the internal flash. It is possible to put this
GPIO to level “1” to boot on system flash (bootloader), by connecting a jumper (pitch 2.54mm) between Morpho
connector CN7 pin7 and VDD pin 5.
As mentioned above, USART1 on PA9/PA10 is connected by default because this interface supports the
Bootloader mode.
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Bootloader
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Page 29
UM3062
USB Type-C® FS
6.11
USB Type-C® FS
The board supports USB full-speed (FS) communication. The USB connector (CN3) is a USB Type-C® connector.
The board supports the USB Type-C® Sink power mode only.
The USB power green LED (LD6) lights up when V
device.
6.11.1 USB FS device
With a USB stack inside the STM32, and when a USB host connection to the USB Type-C® connector (CN3)
of the STM32 Nucleo-64 is detected, the Nucleo-64 board can be a USB device. Depending on the powering
capability of the USB host, the board can be powered by the CN3 V
diagrams, the corresponding power voltage line is called 5V_UCPD. The STM32 Nucleo-64 board supports a 5 V
USB voltage from 4.75 to 5.5 V. MCU VDD_USB supports the 3V3 voltage only. Section 6.4 provides information
on how to use the powering options.
The hardware configuration for the USB FS interface is shown in Table 10.
I/O
PA11 SB38
PA12 SB41
1. The default configuration is shown in bold.
Table 10. Hardware configuration for the USB interface
Solder bridge Setting
OFF
ON
OFF
ON
is powered by a USB host and the board works as a USB
BUS
terminal. In the board schematic
BUS
Configuration
PA11 used as USB_FS_N differential pair interface
No other multiplexing
PA11 can be used as a USB data interface and PA11 is also
available on the ST morpho connector.
USB function can be used, but performances can be impacted due
to the track length to the expansion connector causing impedance
mismatch.
PA12 used as USB_FS_P differential pair interface
No other multiplexing
PA12 can be used as a USB data interface and PA12 is also
available on the ST morpho connector.
USB function can be used, but performances can be impacted due
to the track length to the expansion connector causing impedance
mismatch.
(1)
6.11.2 UCPD
The USB Type-C® introduces the USB Power Delivery feature. The STM32 Nucleo-64 implementation for the
USB power delivery supports the dead battery and the Sink mode with 5 V and 0.5 A (2.5 W).
In addition to the I/O DP/DM directly connected to the USB Type-C® connector, and because only Sink mode with
2.5 W is supported. CC1 and CC2 signals are not needed to be connected to the MCU, only one more GPIO is
needed for the UCPD feature: VBUS_SENSE connected to an ADC to probe V
To protect the STM32 Nucleo-64 board from USB over-voltage, a programmable power supply (PPS)‑compliant
USB Type-C® port protection is used: TCPP01‑M12 IEC6100‑4‑2 level 4‑compliant IC.
• Configuration channel: UCPD_CCx and Dead battery UCPD_DBn: As the STM32 Nucleo-64 supports only
• Also TCPP01-M12 V
For more detail about UCPD with the TCPP01-M12 USB Type-C® port protection for sink application, refer to the
application note USB Type-C® Power Delivery using STM32 MCUs and MPUs (AN5225).
UM3062 - Rev 1
.
BUS
Sink current mode with 5 V and 500 mA (2.5 W), these signals are directly connected to the ground
through the ST USB port protection TCPP01-M12.
OVP is set at 6 V with the resistor bridge on VBUS_CTRL (R59). The resistor is
BUS
set to 2.4 kΩ to select a 6 V maximum.
page 29/45
Page 30
Table 11 describes the hardware configuration for the UCPD feature.
Table 11. Hardware configuration for the UCPD feature
I/O Solder bridge Setting
PC2 SB31
1. The default configuration is shown in bold.
ON PC2 used as VBUS_SENSE
OFF PC2 NOT used for UCPD. It can be used on the expansion connector.
Configuration
UM3062
USB Type-C® FS
(1)
6.11.3
USB Type-C® connector
Figure 14 shows the pinout of the USB Type-C® connector ().
Figure 14. USB Type-C® connector () pinout
A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12
GND TX1+ TX1- VBUS CC1 D+ D- SBU1 VBUS RX2- RX2+ GND
GND RX1+ RX1- VBUS SBU2 D- D+ CC2 VBUS TX2- TX2+ GND
B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1
Table 12 describes the pinout of the USB Type-C® connector ().
Table 12. USB Type-C® connector () pinout
STM32 pin
- GND GND A1 B12 GND GND -
- - TX1+ A2 B11 RX1+ - -
- - TX1- A3 B10 RX1- - -
-
-
PA12 USB_FS_P D+ A6 B7 D- USB_FS_N PA11
PA11 USB_FS_N D- A7 B6 D+ USB_FS_P PA12
- - SBU1 A8 B5 CC2
-
- - RX2- A10 B3 TX2- - -
- - RX2+ A11 B2 TX2+ - -
- GND GND A12 B1 GND GND -
Signal name Pin name Pin Pin Pin name Signal name STM32 pin
VBUS_C/
5V_UCPD
UCPD_CC1 on
TCPP01
VBUS A4 B9 VBUS
CC1 A5 B8 SBU2 - -
VBUS_C/
5V_UCPD
UCPD_CC2 on
TCPP01
VBUS_C/
5V_UCPD
VBUS A9 B4 VBUS
VBUS_C/
5V_UCPD
-
-
-
UM3062 - Rev 1
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Page 31
7 Extension connectors
Six extension connectors are implemented on the board:
• ARDUINO® Uno V3 connectors (CN5, CN6, CN8, and CN9)
• ST morpho connectors (CN7 and CN10)
UM3062
Extension connectors
7.1
ARDUINO® Uno V3
The CN5, CN6, CN8, and CN9 connectors are female connectors supporting the ARDUINO® Uno V3 standard.
Most shields designed for ARDUINO® can fit the Nucleo-64 board.
Caution: Most of the STM32 microcontroller I/Os are 5V‑tolerant, but few of them are only 3.6V‑compatible, while
ARDUINO® Uno V3 is 5V‑compatible. Refer to the STM32U5 series data brief and STM32U5xx product
datasheets for their I/O structure.
Figure 15. ARDUINO® Uno V3
ARDUINO
®
Power
(CN6)
ARDUINO
(CN5)
®
D[15-8]
STM32
microcontroller
ARDUINO
ARDUINO
®
ADC
(CN8)
(CN9)
The related pinout for the ARDUINO® connector is listed in Table 13, Table 14, Table 15, and Table 16.
®
D[7-0]
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Page 32
ARDUINO® Uno V3
Table 13. ARDUINO® power connector (CN6) pinout
Pin Pin name Signal name STM32 pin MCU function
1 NC NC - RESERVED
2 IOREF IOREF - IO REF
3 NRST NRST NRST RESET
4 3V3 3V3 - 3V3 input/output
5 5V 5V - 5V output
6 GND GND - GND
7 GND GND - GND
8 VIN VIN - VIN (7-12V)
Table 14. ARDUINO® ADC connector (CN8) pinout
Pin Pin name Signal name STM32 pin MCU function
1 A0 ADC PA0 ADC1_IN5
2 A1 ADC PA1 ADC1_IN6
3 A2 ADC PA4 ADC1_IN9
4 A3 ADC PB0 ADC1_IN15
5 A4 ADC / I²C PC1 ADC1_IN2 / I2C3_SDA
6 A5 ADC / I²C PC0 ADC1_IN1 / I2C3_SCL
UM3062
Table 15. ARDUINO® D[7-0] connector (CN9) pinout
Pin
1 D7 IO PA8 IO
2 D6 PWM PB10 TIM2_CH3
3 D5 PWM PB4 TIM3_CH1
4 D4 IO PB5 IO
5 D3 PWM PB3 TIM2_CH2
6 D2 IO PC8 IO
7
8
1. The default configuration for the D0/D1 signal is LPUART1 on PA2 and PA3, USART1 on PA9 and PA10 is connected by
default on STLINK-V3EC.
Pin name Signal name STM32 pin MCU function
D1
D0
(1)
(1)
USART_A_TX PA2 LPUART1
USART_A_RX PA3 LPUART1
UM3062 - Rev 1
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Page 33
UM3062
ARDUINO® Uno V3
Table 16. ARDUINO® D[15-8] connector (CN5) pinout
Pin Pin name Signal name STM32 pin MCU function
1 D15 I2C_SCL PB6 I2C1_SCL / I2C4_SCL
2 D14 I2C_SDA PB7 I2C1_SDA / I2C4_SDA
3 VREFP - - -
4 GND - - -
5 D13 SPI_SCK PA5 SPI1_SCK
6 D12 SPI_MISO PA6 SPI1_MISO
7 D11 SPI_MOSI / PWM PA7 SPI1_MOSI / TIM3_CH2
8 D10 SPI_NSS / PWM PC9
SPI_NSS / TIM3_CH4
8 D9 PWM PC6 TIM3_CH1
10 D8 IO PC7 -
1. Due to muxing constraints, SPI_NSS is not available as an alternate on this I/O, so this pin is affected with an I/O function to
do the chip select.
(1)
UM3062 - Rev 1
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Page 34
7.2 ST morpho headers (CN7 and CN10)
The ST morpho connector consists of CN7 and CN10 2.54‑pitch male pin header. They can be used to connect
the STM32 Nucleo-64 board to an extension or a prototype/wrapping board placed on top of it. All signals and
power pins of the STM32 are available on the ST morpho connector. An oscilloscope, a logic analyzer, or a
voltmeter can also probe this connector.
Figure 16. ST morpho connector
UM3062
ST morpho headers (CN7 and CN10)
ST morpho header
(CN7)
Table 17 shows the pin assignments for the STM32 on the ST morpho connector.
ST morpho header
(CN10)
UM3062 - Rev 1
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Page 35
UM3062
ST morpho headers (CN7 and CN10)
Table 17. ST morpho connector pin assignment
CN7 odd pins CN7 even pins CN10 odd pins CN10 even pins
Pin number Pin name Pin number Pin name Pin number Pin name Pin number Pin name
1 PC10 2 PC11 1 - 2 PA9
3 PC12 4 PD2 3 PB6 4 PA10
5 VDD 6 E5V 5 PB7 6 -
7
PH3_BOOT0
(1)
8 GND 7
VREFP
(2)
8
9 - 10 - 9 GND 10 -
11 - 12 IOREF 11 PA5 12
13
15
PA13
PA14
(5)
(5)
14 NRST 13 PA6 14
16 3V3 15 PA7 16 -
17 PA15 18 5V 17 PC9 18 -
19 GND 20 GND 19 PC6 20 GND
21 - 22 GND 21 PC7 22 PB2
23 PC13 24 VIN 23 PA8 24 PB1
25 PC14 26 - 25 PB10 26 PB15
27 PC15 28 PA0 27 PB4 28 PB14
29 PH0 30 PA1 29 PB5 30 PB13
31 PH1 32 PA4 31 PB3 32 AGND
33 VBAT 34 PB0 33 PC8 34 -
35 PC2 36 PC1 35
37 PC3 38 PC0 37
PA2
PA3
(6)
(6)
36 PB8
38 -
1. The default state of BOOT0 is 0. It can be set to 1 when a jumper is plugged into the pins 5 (VDD) and 7 (PH3
CN7.
2. V
is also called ADD on Nucleo-64 because it is the same pin in the LQFP64 package. Connected by default to
REFP
VDD_MCU (SB13 ON). SB13 must be OFF to connect to external VREF from ARDUINO®.
3. VBUS_STLK is the 5V power signal, coming from the STLINK-V3EC USB connector. It rises before the 5V signal of the
board.
4.
PA11 and PA12 are shared with USB signals connected to a USB Type-C® connector (SB38 and SB39 ON).
5. PA13 and PA14 are shared with SWD signals connected to STLINK-V3EC (SB29 and SB30 ON).
6. The default configuration for pins 35 and 37 is PA2 and PA3. PA9 and PA10 can be connected instead of PA2 and PA3
depending on the solder bridge configuration.
VBUS_STL
(3)
K
PA12
PA11
‑
BOOT0) of
(4)
(4)
UM3062 - Rev 1
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Page 36
Solder bridge configuration for the expansion connector
7.3 Solder bridge configuration for the expansion connector
Table 18 details the solder bridges of the STM32 Nucleo-64 board for the expansion connector.
Table 18. Solder bridge configuration
Definition Bridge
SB9
ARDUINO® IOREF
selection
SB11
ARDUINO® green LED
(LD2)
SB10
1. The default configuration is in bold.
2. All Nucleo-64 products are delivered with solder bridges configured according to the supported target MCU.
3. For pins 35 and 37 used in the serial interface selection, refer to Section 6.9 Virtual COM port (VCP).
Setting
(1)(2)
Comment
OFF IOREF is not connected to the VDD power supply.
ON IOREF is connected to the VDD power supply.
OFF IOREF is not connected to the 3V3 power supply.
ON IOREF is connected to the 3V3 power supply.
PA5 does not drive the LD2 LED. This configuration can be
OFF
used in case of a signal issue on SPI-SCK depending on the
ARDUINO® shield.
ON PA5 does not drive the LD2 LED and the SPI_SCK.
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8 NUCLEO-U545RE-Q board information
8.1 Product marking
The stickers located on the top or bottom side of all PCBs provide product information:
• First sticker: product order code and product identification, generally placed on the main board featuring
the target device.
Example:
Product order code
Product identification
• Second sticker: board reference with revision and serial number, available on each PCB.
Example:
MBxxxx-Variant-yzz
syywwxxxxx
On the first sticker, the first line provides the product order code, and the second line the product identification.
On the second sticker, the first line has the following format: “MBxxxx-Variant-yzz”, where “MBxxxx” is the board
reference, “Variant” (optional) identifies the mounting variant when several exist, “y” is the PCB revision, and “zz”
is the assembly revision, for example B01. The second line shows the board serial number used for traceability.
Parts marked as “ES” or “E” are not yet qualified and therefore not approved for use in production. ST is not
responsible for any consequences resulting from such use. In no event will ST be liable for the customer using
any of these engineering samples in production. ST’s Quality department must be contacted prior to any decision
to use these engineering samples to run a qualification activity.
“ES” or “E” marking examples of location:
• On the targeted STM32 that is soldered on the board (for an illustration of STM32 marking, refer to the
STM32 datasheet Package information paragraph at the www.st.com website).
• Next to the evaluation tool ordering part number that is stuck, or silk-screen printed on the board.
Some boards feature a specific STM32 device version, which allows the operation of any 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.
To use the same commercial stack in their applications, the developers might need to purchase a part number
specific to this stack/library. The price of those part numbers includes the stack/library royalties.
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8.2 NUCLEO-U545RE-Q product history
Table 19. Product history
UM3062
NUCLEO-U545RE-Q product history
Order
code
NUCLEO-U545RE-Q
Product
identification
NUU545REQ$MR1
NUU545REQ$MR2
Product details Product change description Product limitations
MCU:
• STM32U545RET6Q
silicon revision A
MCU errata sheet:
• STM32U535xx and
STM32U545xx device
errata (ES0587)
Board:
• MB1841‑U545REQ‑D01
MCU:
• STM32U545RET6Q
silicon revision Z
MCU errata sheet:
• STM32U535xx and
STM32U545xx device
errata (ES0587)
Board:
• MB1841‑U545REQ‑D01
8.3 Board revision history
Initial revision No limitation
STM32U545RET6Q silicon
revision Z embedded on
NUCLEO-U545RE-Q with the
NUU545REQ$MR2 product
No limitation
Table 20. Board revision history
Board reference Board variant and revision Board change description Board limitations
MB1841 MB1841‑U545REQ‑D01 Initial revision
SWDIO: Because of the level shifter
to support 1V8 MCU debug, SWDIO
frequency is limited to 12 MHz.
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UM3062
Federal Communications Commission (FCC) and ISED Canada Compliance Statements
9 Federal Communications Commission (FCC) and ISED Canada
Compliance Statements
9.1 FCC Compliance Statement
Part 15.19
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 15.21
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.
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 instruction, 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 interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Note: Use only shielded cables.
9.2
Responsible party (in the USA)
Terry Blanchard
Americas Region Legal | Group Vice President and Regional Legal Counsel, The Americas
STMicroelectronics, Inc.
750 Canyon Drive | Suite 300 | Coppell, Texas 75019
USA
Telephone: +1 972-466-7845
ISED Compliance Statement
ISED Canada ICES-003 Compliance Label: CAN ICES-3 (B) / NMB-3 (B).
Étiquette de conformité à la NMB-003 d'ISDE Canada: CAN ICES-3 (B) / NMB-3 (B).
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Revision history
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Table 21. Document revision history
Date Revision Changes
3-Apr-2023 1 Initial release.
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UM3062
Contents
Contents
1 Features ...........................................................................2
2 Ordering information ..............................................................3
2.1 Products and codification ........................................................3
3 Development environment .........................................................4
3.1 System requirements ...........................................................4
3.2 Development toolchains .........................................................4
4 Conventions.......................................................................5
5 Quick start ........................................................................6
5.1 Getting started .................................................................6
5.2 Default board configuration ......................................................6
6 Hardware layout and configuration.................................................9
6.1 Nucleo-64 board layout ........................................................10
6.2 Mechanical drawing ...........................................................12
6.3 Embedded STLINK-V3EC ......................................................13
6.3.1 Description ............................................................13
6.3.2 Drivers ...............................................................14
6.3.3 STLINK-V3EC firmware upgrade ...........................................14
6.3.4 Using an external debug tool to program and debug the on-board STM32 ............15
6.4 Power supply and power selection ...............................................17
6.4.1 External power supply input ...............................................17
6.4.2 Programing/debugging when the power supply is not from STLINK-V3EC (STLK) ......23
6.4.3 Power supply output .....................................................23
6.4.4 Internal power supply ....................................................23
6.4.5 MCU power supply ......................................................24
6.4.6 VDD_MCU IDD measurement .............................................24
6.5 LEDs ........................................................................25
6.6 Push-buttons .................................................................25
6.7 OSC clock sources ............................................................26
6.7.1 LSE: OSC 32 KHz clock supply ............................................26
6.7.2 OSC clock supply .......................................................26
6.8 Reset sources ................................................................27
6.9 Virtual COM port (VCP) ........................................................27
6.10 Bootloader ...................................................................28
6.11 USB Type-C® FS..............................................................29
6.11.1 USB FS device .........................................................29
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Contents
6.11.2 UCPD ................................................................29
6.11.3 USB Type-C® connector ..................................................30
7 Extension connectors ............................................................31
7.1 ARDUINO® Uno V3 ...........................................................31
7.2 ST morpho headers (CN7 and CN10) ............................................34
7.3 Solder bridge configuration for the expansion connector .............................36
8 NUCLEO-U545RE-Q board information ............................................37
8.1 Product marking ..............................................................37
8.2 NUCLEO-U545RE-Q product history .............................................38
8.3 Board revision history ..........................................................38
9 Federal Communications Commission (FCC) and ISED Canada Compliance
Statements .......................................................................39
9.1 FCC Compliance Statement ....................................................39
9.2 ISED Compliance Statement ....................................................39
Revision history .......................................................................40
List of tables ..........................................................................43
List of figures..........................................................................44
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List of tables
List of tables
Table 1. Ordering information..................................................................3
Table 2. Codification explanation ...............................................................3
Table 3. ON/OFF convention ..................................................................5
Table 4. Default jumper configuration ............................................................6
Table 5. Jumper configuration .................................................................8
Table 6. STDC14/MIPI10 debug connector (CN4) pinout.............................................. 16
Table 7. Power sources capability .............................................................17
Table 8. MCU power configuration ............................................................. 24
Table 9. USART1 LPUART1 connection ......................................................... 27
Table 10. Hardware configuration for the USB interface ...............................................29
Table 11. Hardware configuration for the UCPD feature ............................................... 30
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17. ST morpho connector pin assignment ..................................................... 35
Table 18. Solder bridge configuration ............................................................ 36
Table 19. Product history ....................................................................38
Table 20. Board revision history ................................................................38
Table 21. Document revision history .............................................................40
USB Type-C® connector () pinout........................................................ 30
ARDUINO® power connector (CN6) pinout ................................................. 32
ARDUINO® ADC connector (CN8) pinout .................................................. 32
ARDUINO® D[7-0] connector (CN9) pinout ................................................. 32
ARDUINO® D[15-8] connector (CN5) pinout ................................................ 33
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UM3062
List of figures
List of figures
Figure 1. Nucleo-64 board (top view) ...........................................................1
Figure 2. Default board configuration ...........................................................7
Figure 3. Hardware block diagram .............................................................9
Figure 4. Nucleo-64 board top layout .......................................................... 10
Figure 5. Nucleo-64 board bottom layout ........................................................ 11
Figure 6. Nucleo-64 board mechanical drawing (in millimeters)......................................... 12
Figure 7. Connecting an external debug tool to program the on-board STM32 microcontroller ................... 15
Figure 8. STDC14/MIPI10 debug connector (CN4) ................................................. 16
Figure 9. 5V jumper selection JP3[1-2]: STLK power source ..........................................18
Figure 10. 5V jumper selection JP3[3-4]: VIN_5V power source .........................................19
Figure 11. 5V jumper selection JP3[5-6]: E5V power source ...........................................20
Figure 12. 5V jumper selection JP3[7-8]: CHGR power source.......................................... 21
Figure 13. 5V jumper selection JP3[9-10]: USB USER power source .....................................22
Figure 14.
Figure 15.
Figure 16. ST morpho connector .............................................................. 34
USB Type-C® connector () pinout ......................................................30
ARDUINO® Uno V3................................................................ 31
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UM3062
IMPORTANT NOTICE – READ CAREFULLY
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Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of
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are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2023 STMicroelectronics – All rights reserved
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