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UM2505
User manual
STM32G4 Nucleo-64 boards (MB1367)
Introduction
The STM32G4 Nucleo-64 boards based on the MB1367 reference board (NUCLEO-G431RB, NUCLEO-G474RE) provide an
affordable and flexible way for users to try out new concepts and build prototypes with the STM32G4 Series microcontrollers,
choosing from the various combinations of performance, power consumption and features. The Arduino™ Uno V3 connectivity
and the ST morpho headers provide an easy means of expanding the functionality of the Nucleo open development platform
with a wide choice of specialized shields. The STM32G4 Nucleo-64 boards do not require any separate probe as they integrate
the STLINK-V3E debugger/programmer. The STM32G4 Nucleo-64 boards come with the comprehensive free software libraries
and examples available with the STM32CubeG4 MCU Package.
Figure 1. NUCLEO-G474RE top view
Figure 2. NUCLEO-G474RE bottom view
Pictures are not contractual.
UM2505 - Rev 2 - April 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
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1 Features
• STM32G4 microcontroller (Arm® Cortex®-M4 at 170 MHz) in LQFP64 package featuring:
– 128 KBytes of Flash memory and 32 Kbytes of SRAM for STM32G431RBT6
– 512 KBytes of Flash memory and 128 Kbytes of SRAM for STM32G474RET6
• Fully compatible with STM32G473RET6 (512 Kbytes of Flash memory and 128 Kbytes of SRAM)
• 1 user LED
• 1 user and 1 reset push-buttons
• 32.768 kHz LSE crystal oscillator
• 24 MHz HSE on-board oscillator
• Board connectors:
– USB with Micro-AB
–
MIPI® debug connector
–
Arduino™ Uno V3 expansion connector
– ST morpho extension pin headers for full access to all STM32G4 I/Os
• Flexible power-supply options: ST-LINK USB V
• On-board STLINK-V3E debugger/programmer with USB re-enumeration capability: mass storage, Virtual
COM port, and debug port
• Comprehensive free software libraries and examples available with the STM32CubeG4 MCU Package
• Support of a wide choice of Integrated Development Environments (IDEs) including IAR™, Keil®, GCCbased IDEs
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
or external sources
BUS
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Features
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2 Ordering information
To order an STM32G4 Nucleo-64 board, refer to Table 1. Additional information is available from the datasheet
and reference manual of the target STM32.
Order code Board reference Target STM32
NUCLEO-G431RB
NUCLEO-G474RE STM32G474RET6U
2.1 Product marking
Evaluation tools marked as “ES” or “E” are not yet qualified and therefore not ready to be used as reference
design or in production. Any consequences deriving from such usage will not be at ST charge. In no event, ST will
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, 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.
In order to use the same commercial stack in his application, a developer may need to purchase a part number
specific to this stack/library. The price of those part numbers includes the stack/library royalties.
Table 1. List of available products
MB1367
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Ordering information
STM32G431RBT6U
2.2 Codification
The meaning of the codification is explained in Table 2.
NUCLEO-G4XXRY Description Example: NUCLEO-G474RE
G4 MCU series in STM32 Arm Cortex MCUs STM32G4 Series
XX MCU line in the series STM32G474 line
R STM32 package pin count 64 pins
Y
The order code is mentioned on a sticker placed on the top side of the board.
Table 2. Codification explanation
STM32 Flash memory size:
• B for 128 Kbytes
• E for 512 Kbytes
512 Kbytes
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3 Development environment
3.1 System requirements
• Windows® OS (7, 8 and 10), Linux® 64-bit, or macOS
• USB Type-A to Micro-B cable
Note:
macOS® is a trademark of Apple Inc. registered in the U.S. and other countries.
UM2505
Development environment
®
3.2
Note:
Development toolchains
• Keil® MDK-ARM (see note)
• IAR™ EWARM (see note)
• GCC-based IDEs
On Windows® only.
3.3 Demonstration software
The demonstration software, included in the STM32Cube MCU Package corresponding to the on-board
microcontroller, is preloaded in the STM32 Flash memory for easy demonstration of the device peripherals in
standalone mode. The latest versions of the demonstration source code and associated documentation can be
downloaded from www.st.com.
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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 should be 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
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Conventions
Table 3. ON/OFF convention
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5 Quick start
The STM32G4 Nucleo-64 board is a low-cost and easy-to-use development kit, used to evaluate and start a
development quickly with an STM32G4 Series microcontroller in LQFP64 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 STM32G4 Nucleo-64 and for demonstration software, visit the www.st.com/stm32nucleo
webpage.
5.1 Getting started
Follow the sequence below to configure the STM32G4 Nucleo-64 board and launch the demonstration application
(refer to Figure 4 for component location):
1. Check the jumper position on the board (refer to Table 4)
2. For the correct identification of the device interfaces from the host PC and before connecting the board,
install the Nucleo USB driver available on the www.st.com/stm32nucleo website
3. To power the board, connect the STM32G4 Nucleo-64 board to a PC with a USB cable (Type-A to Micro-B)
through the USB connector CN1 of the board
4. Then, green LED LD3 (5V_PWR) and red LED LD1 (COM) light up, green LED LD2 (USER) blinks
5. Press user button B1 (left blue USER button)
6. Observe how the blinking of the green LED LD2 changes according to the clicks on button B1
7. The software demonstration and the several software examples that allow users exercise Nucleo features,
are available on the www.st.com/stm32nucleo webpage
8. Develop your own application using the available examples
UM2505
Quick start
Table 4. Jumper configuration
Jumper
JP1 NRST OFF STLINK-V3E reset
JP3 T_RST ON -
JP5 5 V power-source selection
JP6 IDD ON
JP7 BOOT0 OFF
JP8
1. Default jumper state is shown in bold.
VREF+ selection (VREF or VDD
voltage supply selection)
Definition
Position
ON [1-2] (Default) 5V_USB_STLK (from ST-LINK)
ON [3-4] (optional) 5V_VIN
ON [5-6] (optional) E5V
ON [7-8] (optional) 5V_USB_CHGR
ON [1-2] (Default) VREF+ supplied with VREF
ON [2-3] (optional) VREF+ supplied with VDD
(1)
Comment
(1)
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6 Hardware layout and configuration
The STM32G4 Nucleo-64 board is designed around the STM32 microcontrollers in a 64-pin LQFP package.
Figure 3 shows the connections between the STM32 and its peripherals (STLINK-V3E, push-buttons, LEDs, USB,
Arduino™ Uno and ST morpho headers). Figure 4 and Figure 5 show the location of these features on the
STM32G4 Nucleo-64 board. The mechanical dimensions of the board are shown in Figure 6.
Figure 3. Hardware block diagram
UM2505
Hardware layout and configuration
STLINK-V3E part
GND
DEBUG
STLK_RST
SWD
Embedded
STLINK-V3E
B1
button
USER
VCP
UART
USB
Micro-B
connector
(CN1)
Green LED
LD2 (USER)
SWD
VCP
UART
GPIOGPIO
LD4 (OC)
button
RESET
VREFIDD
Red LED
B2
Green/Orange LED LD1
(COM)
PWR SEL
Green LED LD3
(5V_PWR)
5V
GND
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xxx
ST morpho
Connectors
or jumpers
Arduino™
BOOT0
STM32G4XXRY
GPIO
OSC_32
32 kHz
crystal
OSC
24 MHz
crystal
GPIO
Arduino™
ST morpho
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6.1 PCB layout
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PCB layout
Figure 4. Top layout
U5 STM32F723IEK6
(STLINK-V3E MCU)
CN4
MIPI10 connector
X1 (25 MHz)
B1 USER button
JP3 Target reset
U11 5V_Vin regulator
LD1117S50TR
JP6
IDD measurement
CN6
Arduino™ connector
JP7
BOOT0
CN8
Arduino™ connector
CN7
ST morpho pin header
CN2
DFU connector
STLINK-V3E reset
CN1 STLINK-V3E
Micro-B USB connector
JP1
LD1 bicolor LED
LD4 red LED
LD4 red LED
(Over current)
(Over current)
(COM)
LD3 green LED
(5V_PWR)
JP5 5V power
source selection
B2 RESET button
U12 3V3 regulator
LD39050PU33R
JP8
VREF selection
CN5
Arduino™ connector
U14 voltage ref. IC
TL1431CL5T
CN9
Arduino™ connector
CN10
ST morpho pin header
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X2
32 kHz
X3
24 MHz
HW102
product sticker
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Figure 5. Bottom layout
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PCB layout
JP5 5V power
source selection
JP8
VREF selection
JP6
IDD measurement
CN5
Arduino™ connector
CN1 STLINK-V3E
Micro-B USB connector
STLINK-V3E reset
CN2
DFU connector
JP1
HW101
board sticker
CN4
MIPI10 connector
JP3 Target reset
CN6
Arduino™ connector
JP7 BOOT0
Arduino™ connector
CN9
CN10
ST morpho pin header
CN8
Arduino™ connector
CN7
ST morpho pin header
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6.2 Mechanical drawing
Figure 6. STM32G4 Nucleo 64 board mechanical drawing (in millimeter)
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Mechanical drawing
6.3 Embedded STLINK-V3E
There are two different ways to program and debug the onboard STM32 MCU:
• Using the embedded STLINK-V3E
• Using an external debug tool connected to the CN4 MIPI10 connector.
The STLINK-V3E programming and debugging tool is integrated in the STM32G4 Nucleo-64 board.
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The embedded STLINK-V3E supports only SWD and VCP for STM32 devices. For information about debugging
and programming features of STLINK-V3, refer to the STLINK-V3SET debugger/programmer for STM8 and
STM32 user manual (UM2448), which describes in details all the STLINK-V3 features.
Features supported on STLINK-V3E:
• 5V power supplied by USB connector (CN1)
• USB 2.0 high-speed-compatible interface
• JTAG/serial wire debugging (SWD) specific features:
– 3 V to 3.6 V application voltage on the JTAG/SWD interface and 5 V tolerant inputs
– JTAG
– SWD and serial viewer (SWV) communication
• Direct Firmware Update (DFU) feature (CN2)
• MIPI10 connector (CN4)
• Status LED LD1 (COM) that blinks during communication with the PC
• Fault red LED LD4 (OC) alerting on USB overcurrent request
• 5 V / 300 mA output power supply capability (U4) with current limitation and LED
• 5 V power green LED LD3 (5V_PWR)
6.3.1 Drivers
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Embedded STLINK-V3E
Before connecting the STM32G4 Nucleo-64 board to a Windows 7®, Windows 8® or Windows 10® PC via USB, a
driver for the STLINK-V3E must be installed (not required for Windows 10®) . It is available at the www.st.com
website.
In case the STM32G4 Nucleo-64 board is connected to the PC before the driver is installed, some STM32G4
Nucleo-64 interfaces may be declared as “Unknown” in the PC device manager. In this case, the user must install
the dedicated driver files, and update the driver of the connected device from the device manager a shown in
Figure 7.
Note: Prefer using the USB Composite Device handle for a full recovery.
Figure 7. USB composite device
Note: 37xx:
• 374E for STLINK-V3E without bridge functions
• 374F for STLINK-V3E with bridge functions
6.3.2 STLINK-V3E firmware upgrade
The STLINK-V3E embeds a firmware upgrade mechanism for in-situ upgrade through the USB port. As the
firmware may evolve during the lifetime of the STLINK-V3E product (for example new functionalities, bug fixes,
support for new microcontroller families), it is recommended to visit the www.st.com website before starting to use
the STM32G4 Nucleo-64 board and periodically, to stay up-to-date with the latest firmware version.
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6.3.3 Using an external debug tool to program and debug the on-board STM32
There are two basic ways to support an external debug tool:
1. Keep the embedded STLINK-V3E running. Power on the STLINK-V3E at first until the COM LED turns red.
Then connect the external debug tool through the CN4 STDC14/MIPI-10 debug connector
2. Set the embedded STLINK-V3E in hig-impedance state: when jumper JP1 (STLK_RST) is ON, the
embedded STLINK-V3E is in RESET state and all GPIOs are in high-impedance; then, connect the external
debug tool to debug connector CN4.
Figure 8. Connecting an external debug tool to program the on-board STM32G4
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Embedded STLINK-V3E
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Table 5. MIPI10 / STDC14 debug connector (CN4)
MIPI10 pin
- 1 NC Reserved
- 2 NC Reserved
1 3 3V3 Target VCC
2 4 T_SWDIO
3 5 GND Ground
4 6 T_SWCLK
5 7 GND Ground
6 8 T_SWO
7 9 NC Not connected
STDC14 pin CN4 Function
Target SWDIO using SWD protocol or Target JTMS (T_JTMS) using
JTAG protocol
Target SWCLK using SWD protocol or Target JCLK (T_JCLK) using
JTAG protocol
Target SWO using SWD protocol or Target JTDO (T_JTMS) using
JTAG protocol
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MIPI10 pin STDC14 pin CN4 Function
8 10 T_JTDI
9 11 GNDDetect GND detect for plug indicator, used on SWD and JTAG neither
10 12 T_NRST
- 13 T_VCP_RX Target RX used for VCP (must be UART dedicated to bootloader)
- 14 T_VCP_TX Target TX used for VCP (must be UART dedicated to bootloader)
6.4 Power supply
The power supply can be provided by five different sources:
• A host PC connected to CN1 through a USB cable (default setting)
• An external 7 V - 12 V (VIN) power supply connected to CN7 pin 24
• An external 5 V (E5V) power supply connected to CN7 pin 6
• An external 5 V USB charger (5V_USB_CHGR) connected to CN1
• An external 3.3 V power supply (3V3) connected to CN7 pin 16
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Power supply
Not used by SWD protocol, Target JTDI (T_JTDI) using JTAG protocol,
only for external tools
Target NRST using SWD protocol or Target JTMS (T_JTMS) using
JTAG protocol
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Figure 9. STM32G4 Nucleo-64 board power tree
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Power supply
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In case 5V_VIN, E5V, 5V_USB_CHGR, or 3V3 is used to power the STM32G4 Nucleo-64 board, this power
source must comply with the EN-60950-1: 2006+A11/2009 standard and must be Safety Extra Low Voltage
(SELV) with limited power capability.
If the power supply is 3V3, the ST-LINK is not powered and cannot be used.
Power supply input from STLINK-V3E USB connector (default setting)
The STM32G4 Nucleo-64 board and shield can be powered from STLINK-V3E connector CN1 (5 V) by placing a
jumper between pins 1-2 of JP5, “5V_SEL”, as illustrated in Figure 10. This is the default setting.
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Power supply
Figure 10. Power supply input from STLINK-V3E USB connector with PC (5 V, 500 mA max)
PC
< 500 mA
CN1
STLINK-V3E
USB
U5
STM32F723
STLINK-V3E
Power switch
5 V
U4
5 V
Legend:
U12
LDO
3V3
3V3
5 V 3.3 V
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If the USB enumeration succeeds, the 5V_USB_STLK power is enabled, by asserting the T_PWR_EN signal from
STM32F723IEK6 “STLINK V3” (U5). This pin is connected to a power switch STMPS2151STR (U4), which
powers the board. The power switch STMPS2151STR (U4) features also a current limitation to protect the PC in
case of short-circuit on board. If an overcurrent (more than 500 mA) happens on board, the red LED LD4 is lit.
The Nucleo board and its shield can be powered from ST-LINK USB connector CN1, but only ST-LINK circuit gets
power before USB enumeration, because the host PC only provides 100 mA to the board at that time.
During the USB enumeration, the Nucleo board requires 500 mA power from the host PC.
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Power supply
• If the host is able to provide the required power, the enumeration finishes by a “SetConfiguration” command
and then, the power switch STMPS2151STR is switched ON, the green LED LD3 (5V_PWR) is turned ON,
thus Nucleo board and its shield on it can consume 500 mA at the maximum.
• If the host is not able to provide the requested current, the enumeration fails. Therefore, the
STMPS2151STR power switch (U4) remains OFF and the MCU part including the extension board is not
powered. As a consequence, the green LED LD5 remains turned OFF. In this case, it is mandatory to use an
external power supply.
Caution: If the maximum current consumption of the STM32G4 Nucleo-64 board and its shield boards exceeds 300 mA, it
is mandatory to power the STM32G4 Nucleo-64 board with an external power supply connected to E5V, VIN or
3.3 V.
External power supply input from VIN (7 V - 12 V, 800 mA max)
When the STM32G4 Nucleo-64 board is power-supplied by VIN (refer to Table 6 and Figure 11), the jumper
configuration must be the following: jumper JP2 on pins 3-4 “5V_VIN”.
The STM32G4 Nucleo-64 board and its shield boards can be powered in three different ways from an external
power supply, depending on the voltage used. The three cases are summarized in Table 6.
Table 6. External power sources: VIN (7 V - 12 V)
Input power
name
VIN
Connector
pins
CN6 pin 8
CN7 pin 24
Voltage range
7 V to 12 V 800 mA
Maximum
current
Limitation
From 7 V to 12 V only and input current capability is
linked to input voltage:
• 800 mA input current when VIN = 7 V
• 450 mA input current when 7 V < VIN < 9 V
• 250 mA input current when 9 V < VIN < 12 V
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Figure 11. Power supply input from VIN (7 V - 12 V, 800 mA max)
5 V
U12
U11
LD1117
S50TR
LDO
3V3
3V3
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Power supply
VIN < 12 V
Legend:
Refer to Section 6.4.1 for debugging when using an external power supply.
External power supply input from E5V (5 V, 500 mA max)
When the STM32G4 Nucleo-64 board is power-supplied by E5V (refer to Table 7 and Figure 12), the jumper
configuration must be the following: jumper JP5 on pins 5-6 “E5V”.
VIN < 12 V 5 V 3.3 V
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Table 7. External power sources: E5V (5 V)
Input power name
E5V CN7 pin 6 4.75 V to 5.25 V 500 mA
Connector pins Voltage range Maximum current
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Figure 12. Power supply input from 5V_EXT (5 V, 500 mA max)
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Power supply
Legend:
5 V
U12
LDO
3V3
5 V 3.3 V
3V3
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Refer to Section 6.4.1 for debugging when using an external power supply.
External power supply input from USB charger (5 V)
When the STM32G4 Nucleo-64 board is power-supplied by a USB charger on CN1 (refer to Table 8 and
Figure 13), the jumper configuration must be the following: jumper JP2 on pins 7-8 “5V_CHGR”.
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Power supply
Table 8. External power sources: 5V_CHGR (5 V)
Input power name Connector pins Voltage range Maximum current
5V_CHGR CN1 5 V -
Figure 13. Power supply input from ST-LINK USB connector with USB charger (5 V)
USB charger
CN1
STLINK-V3E
USB
No debug
3V3
5 V
U12
LDO
3V3
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Legend:
5 V 3.3 V
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Power supply
External power supply input from external 3.3 V
When the 3.3 V is provided by a shield board, it is interesting to use the 3.3 V (CN6 pin 4 or CN7 pin 16) directly
as power input (refer to Table 9 and Figure 14). In this case, the programming and debugging features are not
available, since the ST-LINK is not powered.
Table 9. External power sources: 3V3
Input power name Connector pins Voltage range Maximum current
3V3
CN6 pin 4
CN7 pin 16
3 V to 3.6 V 1.3 A
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Figure 14. Power supply input from external 3V3
No debug
X
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Power supply
No
jumper
3V3
Legend:
3.3 V
6.4.1 Debugging while using VIN or EXT as an external power supply
When powered by VIN or E5V, it is still possible to use the ST-LINK for programming or debugging only, but it is
mandatory to power the board first using VIN or EXT, then to connect the USB cable to the PC. In this way the
enumeration succeeds, thanks to the external power source.
The following power-sequence procedure must be respected:
1. Connect jumper JP5 between pins 5 & 6 for E5V or between pins 3 & 4 for VIN
2. Connect the external power source to VIN or E5V
3. Power on the external power supply 7V < VIN < 12 V for VIN, or 5V for E5V
4. Check that the green LED LD3 is turned ON
5. Connect the PC to the USB connector CN1
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If this order is not respected, the board may be powered by USB first, then by VIN or E5V as the following risks
may be encountered:
1. If more than 300 mA current is needed by the board, the PC may be damaged or the current supplied can be
limited by the PC. As a consequence, the board is not powered correctly.
2. 300 mA is requested at enumeration so there is risk that the request is rejected and the enumeration does
not succeed if the PC cannot provide such current. Consequently, the board is not power supplied (LED LD3
remains OFF).
6.5 Clock sources
6.5.1 HSE clock (high-speed external clock)
There are four ways to configure the pins corresponding to the high-speed external clock (HSE):
• MCO from ST-LINK: MCO output of ST-LINK is used as input clock. This frequency cannot be changed, it is
fixed at 8 MHz and connected to the PF0-OSC_IN of the STM32 microcontroller. The configuration must be:
– SB27 ON
– SB25 and SB26 OFF
– SB24 and SB28 OFF
• HSE on-board oscillator from X3 crystal (default): For typical frequencies and its capacitors and
resistors, refer to the STM32 microcontroller datasheet and to the Oscillator design guide for STM8S,
STM8A and STM32 microcontrollers Application note (AN2867) for the oscillator design guide. The X3
crystal has the following characteristics: 24 MHz, 6 pF load capacitance, 20 ppm. It is recommended to use
NX2016SA-24MHz-EXS00A-CS10820 manufactured by NDK. The configuration must be:
– SB25 and SB26 ON
– SB24 and SB28 OFF
– SB27 OFF
– C56 and C59 soldered with 6.8 pF capacitors
• Oscillator from external PF0: from an external oscillator through the pin 29 of the CN7 connector. The
configuration must be:
– SB28 ON
– SB24 OFF
– SB25 and SB26 OFF
– SB27 OFF
• HSE not used: PF0 and PF1 are used as GPIOs instead of as clock. The configuration must be:
– SB24 and SB28 ON
– SB27 OFF
– SB25 and SB26 OFF
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Clock sources
6.5.2 LSE clock (low-speed external clock) – 32.768 kHz
There are three ways to configure the pins corresponding to the low-speed clock (LSE):
• On-board oscillator (default): X2 crystal. Refer to the Oscillator design guide for STM8S, STM8A and
STM32 microcontrollers application note (AN2867). It is recommended to use NX3215SA-32.768kHzEXS00A-MU00525 (32.768 kHz, 6 pF load capacitance, 20 ppm) from NDK.
– SB30 and SB31 ON
– SB29 and SB32 OFF
• Oscillator from external PC14: from external oscillator through the pin 25 of CN7 connector. The
configuration must be:
– SB29 and SB32 ON
– SB30 and SB31 OFF
• LSE not used: PC14 and PC15 are used as GPIOs instead of low-speed clock. The configuration must be:
– SB29 and SB32 ON
– SB30 and SB31 OFF
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6.6 Board functions
6.6.1 LEDs
LD1 STLINK-V3E COM LED
The bicolor LED LD1 (green, red) provides information about STLINK-V3E communication status. LD1 default
color is red. LD1 turns to green to indicate that communication is in progress between the PC and the STLINKV3E, with the following setup:
• Blinking red: the first USB enumeration with the PC is taking place
• Red on: when the initialization between the PC and STLINK-V3E is complete
• Blinking red/green: during communication with target
• Green on: communication finished and successful
• Orange on: communication failure
LD2 USER
This green LED is a user LED connected to STM32G4 I/O PA5 (SB6 ON) corresponding to the Arduino™ D13. To
light LED LD2, a high logic state “1” must be written in the corresponding GPIO PA5. A transistor is used to drive
the LED LD2. LD2 consumption does not impact the VDD STM32G4 power measurement, since LD2 is isolated
from it.
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Board functions
LD3 PWR
The green LED indicates that the STM32G4 part is powered and +5 V power is available on CN6 pin 5 and CN7
pin 18.
LD4 USB power fault (OC, overcurrent)
LD4 indicates that the board power consumption on USB ST-LINK exceeds 500 mA. Consequently, the user must
power the board using an external power supply.
6.6.2 Push-buttons
B1 USER (blue button)
The user button is connected to the STM32G4 I/O PC13 by default (Tamper support, SB16 ON and SB21 OFF) or
PA0 (Wakeup support, SB21 ON and SB16 OFF) of the STM32G4 microcontroller.
B2 RESET (black button)
This push-button is connected to NRST (PG10-NRST) and is used to RESET the STM32G4 microcontroller.
6.6.3 MCU voltage selection on VREF+
The STM32G4 Nucleo-64 board offers the possibility to supply the STM32G4 microcontroller with either VREF or
VDD on its VREF+ input voltage pin.
VREF+ is targeted to offer high-end analog device, especially for precise analog applications (ADC converters
usage) with the STM32G4 microcontroller.
In the STM32G4 Nucleo-64 board, the VREF+ can be supplied with a very stable output voltage provided by the
TL1431CL5T. The TL1431CL5T is an adjustable shunt voltage reference with guaranteed temperature stability
over the entire operating temperature range. The output voltage may be set to any value between 2.5 V and up to
36 V with two external resistors. The TL1431CL5T operates with a wide current range from 1 mA to 100 mA with
a typical dynamic impedance of 0.2 Ω.
JP8 jumper is used to select either the VREF or VDD voltage for VREF+.
• Place the JP8 jumper on [1-2] to supply the MCU VREF+ with VREF
– To have VREF at 2.5 V, then SB14 is fitted and R34 is not fitted
– To have VREF at 3.25 V, then SB14 is not fitted. VREF = 2,5 × (1 + (R33 / R34)) =
2,5 × (1 + (10k / 33k)).
UM2505 - Rev 2
page 23/43
Page 24
• Place the JP8 jumper on [2-3] to supply the MCU VREF+ with VDD
6.6.4 Current consumption measurement (IDD)
Jumper JP6, labeled IDD, is used to measure the STM32G4 microcontroller consumption by removing the jumper
and by connecting an ammeter:
• JP6 ON: STM32 is powered with 3V3 voltage (default)
• JP6 OFF: an ammeter must be connected to measure the STM32G4 current. If there is no ammeter, the
STM32 is not powered.
To get a correct and complete current consumption of the STM32G4, jumper JP8 must be set to [2-3] to supply
the MCU VREF+ with VDD, otherwise, the current consumption at pin VREF+ is not taken into account in the IDD
(through jumper JP6).
6.6.5 Virtual COM port (VCP): LPUART and USART
The STM32G4 Nucleo-64 board offers the possibility to connect an LPUART or a USART interface to the
STLINK-V3E, Arduino™ Uno V3 connector (CN9 pins 2 and 1), or ST morpho connector (CN10 pins 35 and 37).
The selection is done by setting the related solder bridges as detailed in Table 10 and Table 11.
Table 10. USART1 connection
Solder bridge configuration
SB13, SB19: ON
SB12, SB20, SB18, SB22: OFF
SB12, SB20: ON
SB13, SB19, SB17, SB23: OFF
1. The default configuration is shown in bold
(1)
UM2505
Solder bridges
(1)
Feature
USART1 (PC4/PC5) connected to Arduino™ (D1 & D0) and
ST morpho connector (CN10 pin 35 & 37).
USART1 (PC4/PC5) connected to STLINK-V3E Virtual COM
port.
6.7
Table 11. LPUART1 connection
Solder bridge configuration
SB17, SB23: ON
SB18, SB22, SB12, SB20: OFF
SB18, SB22: ON
SB17, SB23, SB13, SB19: OFF
1. The default configuration is shown in bold
(1)
LPUART1 (PA2/PA3) connected to STLINK-V3E Virtual
COM port.
LPUART1 (PA2/PA3) connected to Arduino™ (D1 & D0) and
ST morpho connector (CN10 pin 35 & 37).
Feature
(1)
By default:
• Communication between the target STM32G4 and the STLINK-V3E MCU is enabled on LPUART1 to
support the Virtual COM port
• Communication between the target STM32G4 and Arduino™ (and ST morpho) connectors is enabled on
USART1
Solder bridges
All 41 solder bridges are located on the bottom layer of the STM32G4 Nucleo-64 board.
UM2505 - Rev 2
page 24/43
Page 25
Table 12. Solder bridge configuration
UM2505
Solder bridges
Solder bridge control
Solder
bridge (SB)
100 nF on
PG10-NRST
PB8 on ARD_D14 SB2
PC5 on ST morpho SB3
PB8 on Morpho SB4
3.3 V LDO
output
User LED LD2 SB6
PA15 on Morpho SB7
SMD ferrite bead L1 SB8
JTDI on MIPI10 SB9
SMD ferrite bead L2 SB10
AGND SB11
SB12
PC4
USART1 TX
SB13
VREF voltage
(3.25 V or 2.5 V)
SB14
T_SWO on PB3 SB15
SB1
SB5
State
ON
OFF
ON
OFF
(1)
Description
100 nF capacitor grounded to PG10-NRST of the
STM32G4
100 nF capacitor disconnected from PG10-NRST of the
STM32G4
PB8 connected to Arduino™ D14
PB8 not connected to Arduino™ D14
(1)
ON PC5 connected to ST morpho CN10 pin 6
OFF PC5 not connected to ST morpho CN10 pin 6
ON PB8 connected to ST morpho CN7 pin 7
OFF PB8 not connected to ST morpho CN7 pin 7
ON U12 LDO output provides 3.3 V
OFF
U12 LDO output does NOT provide 3.3 V, user must connect
an external 3.3 V source.
ON User LED driven by PA5 (ARD_D13)
OFF User LED not driven
ON PA15 connected to ST morpho CN7 pin 17
OFF PA15 not connected to ST morpho CN7 pin 17
ON
SMD ferrite bead L1 shunted. VDDA connected on VDD
voltage supply
OFF SMD ferrite bead L1 on STM32G4 VDDA voltage supply
ON JTDI connected to MIPI10 connector (CN4 pin 10)
OFF JTDI not connected to MIPI10 connector (CN4 pin 10)
ON
SMD ferrite bead L2 shunted. VREF+ connected to either
VREF or VDD depending on the jumper position on JP8
SMD ferrite bead L2 on VREF+ (either VREF or VDD
OFF
voltage supply (depending on the jumper position on
JP8)).
ON AGND connected to GND. Reserved, do not modify.
OFF AGND not connected to GND.
ON STLINK_TX (T_VCP_TX) connected to USART1 TX PC4
OFF
STLINK_TX (T_VCP_TX) not connected to USART1 TX
PC4
ON ARD_D1_TX connected to USART1 TX PC4
OFF ARD_D1_TX not connected to USART1 TX PC4
ON
OFF
R33 = 10 kΩ is shunted. Then VREF = 2.5 V. Do not forget to
remove in that case R34 = 33 kΩ.
R33 = 10 kΩ is not shunted. Then VREF = 3.25 V. In that
case, R34 = 33 kΩ must be fitted.
ON T_SWO connected to PB3.
OFF T_SWO not connected to PB3 and isolated from ARD_D3.
UM2505 - Rev 2
page 25/43
Page 26
UM2505
Solder bridges
Solder bridge control
Solder
bridge (SB)
PA2
LPUART1 TX
PA3
LPUART1 RX
PC5
USART1 RX
USER button
HSE CLK
selection
PC4 on ST morpho SB33
VBAT SB38
SB17
SB18
SB23
SB22
SB20
SB19
SB16
SB21
SB25
&
SB26
SB24
SB28
SB27
State
(1)
Description
(1)
ON STLINK_TX (T_VCP_TX) connected to LPUART1 TX PA2.
OFF
STLINK_TX (T_VCP_TX) not connected to LPUART1 TX
PA2.
ON ARD_D1_TX connected to LPUART1 TX PA2.
OFF ARD_D1_TX not connected to LPUART1 TX PA2.
ON STLINK_RX (T_VCP_RX) connected to LPUART1 RX PA3.
OFF
STLINK_RX (T_VCP_RX) not connected to LPUART1 RX
PA3.
ON ARD_D0_RX connected to LPUART1 RX PA3.
OFF ARD_D0_RX not connected to LPUART1 RX PA3.
ON STLINK_RX (T_VCP_RX) connected to USART1 RX PC5.
OFF
STLINK_RX (T_VCP_RX) not connected to USART1 RX
PC5.
ON ARD_D0_RX connected to USART1 RX PC5.
OFF ARD_D0_RX not connected to USART1 RX PC5.
ON USER button connected to PC13.
OFF USER button not connected to PC13.
ON USER button connected to PA0.
OFF USER button not connected to PA0.
ON HSE provided by external HSE 24 MHz CLK X3.
OFF HSE not provided by external HSE 24 MHz CLK X3.
ON
PF1-OSC_IN connected to ST morpho connector I/O usage
(CN7 pin 31).
OFF PF1-OSC_IN not connected to ST morpho connector.
ON
PF0-OSC_OUT connected to ST morpho connector I/O usage
(CN7 pin 29).
OFF PF0-OSC_OUT not connected to ST morpho connector.
ON ST-LINK MCO used for HSE CLK.
OFF ST-LINK MCO not used for HSE CLK.
ON PC4 connected to Morpho CN10 pin 34.
OFF PC4 not connected to Morpho CN10 pin 34.
ON VBAT (pin1 of STM32G4) powered by VDD.
OFF
VBAT (pin1 of STM32G4) supplied separately (through
morpho connector CN7 pin 33).
UM2505 - Rev 2
page 26/43
Page 27
UM2505
Solder bridges
Solder bridge control
bridge (SB)
LSE CLK
selection
PB9 on ARD_A4 SB34
PC1 on ARD_A4 SB35
PC0 on ARD_A5 SB36
PA15 on ARD_A5 SB37
IOREF and 3V3 connection SB39
T_SWDIO
on PA13
T_SWCLK
1. The default SB state is in bold.
on PA14
Solder
SB31
&
SB30
SB32
SB29
SB40
SB41
State
(1)
Description
(1)
ON LSE provided by external LSE 32.768 kHz CLK X2.
OFF LSE not provided by external LSE 32.768 kHz CLK X2.
ON
PC14-OSC32_IN connected to ST morpho connector I/O
usage (CN7 pin 25).
OFF PC14-OSC32_IN not connected to ST morpho connector.
ON
OFF
PC15-OSC32_OUT connected to ST morpho connector I/O
usage (CN7 pin 27).
PC15-OSC32_OUT not connected to ST morpho
connector.
ON PB9 connected to ARD_A4 and connected to CN7 pin 36.
OFF
PB9 not connected to ARD_A4 and connected to CN7 pin
36.
ON PC1 connected to ARD_A4 and connected to CN7 pin 36.
OFF PC1 not connected to ARD_A4 and connected to CN7 pin 36.
ON PC0 connected to ARD_A5 and connected to CN7 pin 38.
OFF PC0 not connected to ARD_A5 and connected to CN7 pin 38.
ON PA15 connected to ARD_A5 and connected to CN7 pin 38.
OFF
PA15 not connected to ARD_A5 and connected to CN7
pin 38.
ON IOREF connected to 3V3 power supply.
OFF IOREF not connected to 3V3 power supply.
ON T_SWDIO connected to PA13.
OFF T_SWO not connected to PA13.
ON T_SWCLK connected to PA14.
OFF T_SWCLK not connected to PA14.
UM2505 - Rev 2
All the other solder bridges present on the STM32G4 Nucleo-64 board are used to configure several I/Os and
power-supply pins for compatibility of features and pinout with the target STM32G4 supported.
page 27/43
Page 28
7 Board connectors
Several connectors are implemented on the STM32G4 Nucleo-64 board.
7.1 STLINK-V3E USB Micro-B connector CN1
The USB connector CN1 is used to connect the embedded STLINK-V3E to the PC for the programming and
debugging purposes.
Figure 15. USB Micro-B connector CN1 (front view)
UM2505
Board connectors
Connecto
r
CN1
Pin
number
Pin name Signal name STLINK-V3E MCU pin Function
1 VBUS 5V_USB_CHGR - 5 V power
2 DM USB_DEV_HS_CN_N R14 USB diff pair N
3 DP USB_DEV_HS_CN_P R15 USB diff pair P
4 ID - - -
5 GND - - GND
7.2 MIPI10 connector CN4
Table 13. USB Micro-B connector CN1 pinout
Figure 16. MIPI10 connector CN4
135791113
UM2505 - Rev 2
2468101214
The MIPI10 connector is implemented with a footprint compatible with the STDC14 footprint. The related pinout
for the MIPI10 connector is listed in Table 14.
page 28/43
Page 29
Arduino™ Uno V3 connectors CN5, CN6, CN8 and CN9
Table 14. MIPI10 connector CN4 pinout (STDC14 pinout compatible)
Connector Pin number Description Pin number Description
1 - 2 -
3 VDD (3V3) 4 T_SWDIO (PA13)
5 GND 6 T_SWCLK (PA14)
CN4
7 KEY (connected to GND) 8 T_SWO (PB3)
9 - 10 T_JTDI (PA15)
11
13 T_VCP_RX (PA3 by default or PC5) 14 T_VCP_TX (PA2 by default or PC4)
GNDDetect (connected to GND through
a 100 Ω resistor)
12 T_NRST
UM2505
7.3
Arduino™ Uno V3 connectors CN5, CN6, CN8 and CN9
The Arduino™ connectors CN5, CN6, CN8 and CN9 are female connectors compatible with the Arduino
standard. Most shields designed for Arduino™ can fit with the STM32G4 Nucleo-64 board.
The Arduino™ connectors on the STM32G4 Nucleo-64 board support the Arduino™ Uno V3.
Figure 17. Arduino™ connectors
Arduino_PWR
CN6
CN5
Arduino_D[8:15]
™
UM2505 - Rev 2
Arduino_A[0:5]
CN8
CN9
Arduino_D[0:7]
page 29/43
Page 30
Arduino™ Uno V3 connectors CN5, CN6, CN8 and CN9
Figure 18. Arduino™ and ST morpho connectors pinout
UM2505
Note:
Arduino™ Uno V3 D0 and D1 signals are connected by default on USART1 (MCU I/O PC4 and PC5). For details
about how to modify the UART interface, refer to Section 6.6.5 Virtual COM port (VCP): LPUART and USART.
Table 15. Arduino™ connectors pinout
Connector
CN6
CN8
Pin number Pin name Signal name
1 NC - - Reserved for test
2 IOREF - - I/O reference
3 NRST NRST PG10-NRST RESET
4 3V3 - - 3V3 input/output
5 5V - - 5 V output
6 GND - - GND
7 GND - - GND
8 VIN - - 7 V - 12 V input power
1 A0 ADC PA0 ADC12_IN1
2 A1 ADC PA1 ADC12_IN2
3 A2 ADC PA4 ADC2_IN17
4 A3 ADC PB0 ADC3_IN12 or ADC1_IN15
5 A4 ADC
6 A5 ADC
STM32 pin
PC1/
PB9
PC0/
PA15
(1)
Function
ADC12_IN7/
I2C1_SDA
ADC12_IN6/
I2C1_SCL
(1)
UM2505 - Rev 2
page 30/43
Page 31
UM2505
ST morpho connectors CN7 and CN10
Connector Pin number Pin name Signal name
10 SCL/D15 ARD_D15 PB8 I2C1_SCL
9 SDA/D14 ARD_D14 PB9 I2C1_SDA
8 VREFP VREFP VREF+ Voltage reference
7 GND - - GND
CN5
6 SCK/D13 ARD_D13 PA5 SPI1_SCK
5 MISO/D12 ARD_D12 PA6 SPI1_MISO
4 PWM/MOSI/D11 ARD_D11 PA7 TIM3_CH2/SPI1_MOSI
3 PWM/CS/D10 ARD_D10 PB6 TIM4_CH1/SPIx_CS
2 PWM/D9 ARD_D9 PC7 TIM3_CH2 or TIM8_CH2
1 D8 ARD_D8 PA9 IO
8 D7 ARD_D7 PA8 IO
7 PWM/D6 ARD_D6 PB10 TIM2_CH3
6 PWM/D5 ARD_D5 PB4 TIM3_CH1
5 D4 ARD_D4 PB5 IO
CN9
4 PWM/D3 ARD_D3 PB3 TIM2_CH2
3 D2 ARD_D2 PA10 IO
2 TX/D1 ARD_D1
1 RX/D0 ARD_D0
1. Default configuration is in bold.
STM32 pin
PA2 /
PC4
PA3 /
PC5
(1)
LPUSART1_TX /
USART1_TX
LPUSART1_RX /
USART1_RX
Function
(1)
7.4
ST morpho connectors CN7 and CN10
ST morpho connectors CN7 and CN10 are male pin headers accessible on both sides of the board. All signals
and power pins of the STM32G4 MCU are available on the morpho connectors. These connectors can also be
probed by an oscilloscope, logical analyzer, or voltmeter.
UM2505 - Rev 2
page 31/43
Page 32
Figure 19. ST morpho connectors
UM2505
ST morpho connectors CN7 and CN10
MORPHO[1:38]
CN7
CN10
MORPHO[1:38]
The pinout of ST morpho connectors CN7 and CN10 is shown in Figure 18. Arduino™ and ST morpho connectors
pinout.
Note: The D0 and D1 signals are connected by default to USART1 (MCU I/O PC4 and PC5). For details about how to
modify the UART interface, refer to Section 6.6.5 Virtual COM port (VCP): LPUART and USART.
Table 16 shows the pin assignment of each STM32G4 I/O on the ST morpho connector.
Table 16. Pin assignment of the ST morpho connectors
CN7 odd pins
Pin nbr Pin name Pin nbr
1 PC10 2 PC11 1 PC9 2 PC8
3 PC12 4 PD2 3 PB8 4 PC6
5 VDD 6 E5V 5 PB9 6 PC5
7
BOOT0
(2)
9 NC 10 NC 9 GND 10 NC
11 NC 12 IOREF 11 PA5 12 PA12
13
15
PA13
PA14
(5)
(5)
17 PA15 18 5V 17 PB6 18 PB11
CN7 even pins CN10 odd pins CN10 even pins
(1)
Pin name
Pin nbr
8 GND 7
Pin name
VREFP
(1)
Pin nbr Pin name
(3)
8
5V_USB_CHGR
14 NRST 13 PA6 14 PA11
16 3V3 15 PA7 16 PB12
(4)
UM2505 - Rev 2
page 32/43
Page 33
UM2505
ST morpho connectors CN7 and CN10
CN7 odd pins CN7 even pins CN10 odd pins CN10 even pins
Pin nbr Pin name Pin nbr
Pin name
(1)
Pin nbr
Pin name
19 GND 20 GND 19 PC7 20 GND
21 PB7 22 GND 21 PA9 22 PB2
23 PC13 24 VIN 23 PA8 24 PB1
25 PC14 26 NC 25 PB10 26 PB15
27 PC15 28 PA0 27 PB4 28 PB14
29 PF0 30 PA1 29 PB5 30 PB13
31 PF1 32 PA4 31 PB3 32 AGND
33 VBAT 34 PB0 33 PA10 34 PC4
35 PC2 36 PC1/PB9 35 PA2 / PC4 36 NC
37 PC3 38 PC0/PA15 37 PA3 / PC5 38 NC
1. Default configuration in bold.
2. BOOT0 is not connected by default. The BOOT0 function is done by SW:
• Option byte nSWBOOT0 must be set to 0 (in that case, BOOT0 is taken from the Option byte nBOOT0)
• Option byte nBOOT0 must be set to 1 (in that case BOOT0 is active low).
If nSWBOOT0 is set to 0, the BOOT0 is taken from pin PB8 / BOOT0.
3. AVDD connected to VREF+
4. 5V_USB_CHGR is the 5 V power from the STLINK-V3E USB connector that rises first. It rises before the 5 V rising on the
board.
5. PA13 and PA14 are shared with SWD signals connected to STLINK-V3E. It is not recommended to use them as I/O pins.
(1)
Pin nbr Pin name
UM2505 - Rev 2
page 33/43
Page 34
8 STM32G4 Nucleo-64 I/O assignment
Table 17. Nucleo-64 I/O assignment
Pin Pin name Signal or label
1 VBAT VBAT VBAT voltage supply
2 PC13 PC13 USER button / IO
3 PC14-OSC32_IN OSC32_IN / PC14 LSE CLK / IO
4 PC15-OSC32_OUT OSC32_OUT / PC15 LSE CLK / IO
5 PF0-OSC_IN OSC_IN / PF0 HSE CLK / I
6 PF1-OSC_OUT OSC_OUT / PF1 HSE CLK / O
7 PG10-NRST T_NRST STM32G4 RESET
8 PC0 PC0 ARD_A5 - ADC12_IN6
9 PC1 PC1 ARD_A4 - ADC12_IN7
10 PC2 PC2 IO
11 PC3 PC3 IO
12 PA0 PA0 ARD_A0 - ADC12_IN1 / User Button
13 PA1 PA1 ARD_A1 - ADC12_IN2
14 PA2 LPUART1_TX ARD_D1 / STLINK_TX (T_VCP_TX)
15 VSS GND PWR GND
16 VDD VDD PWR VDD supply
17 PA3 LPUART1_RX ARD_D0 / STLINK_RX (T_VCP_RX)
18 PA4 PA4 ARD_A2 - ADC2_IN17
19 PA5 PA5 ARD_D13 - SPI1_CLK
20 PA6 PA6 ARD_D12 - SPI1_MISO
21 PA7 PA7 ARD_D11 - TIM3_CH2 / SPI1_MOSI
22 PC4 PC4 IO
23 PC5 PC5 IO
24 PB0 PB0 ARD_A3 - ADC3_IN12
25 PB1 PB1 IO
26 PB2 PB2 IO
27 VSSA AGND AGND
28 VREF+ VREFP Reference voltage supply
29 VDDA AVDD Analog voltage supply
30 PB10 PB10 ARD_D6 / TIM2_CH3
31 VSS GND GND
32 VDD VDD VDD voltage supply
33 PB11 PB11 IO
34 PB12 PB12 IO
35 PB13 PB13 IO
36 PB14 PB14 IO
37 PB15 PB15 IO
STM32G4 Nucleo-64 I/O assignment
Main feature / optional feature / (SB)
UM2505
(1)
UM2505 - Rev 2
page 34/43
Page 35
UM2505
STM32G4 Nucleo-64 I/O assignment
Pin Pin name Signal or label
Main feature / optional feature / (SB)
38 PC6 PC6 IO
39 PC7 PC7 ARD_D9-TIM3_CH2 (or TIM8_CH2) / IO
40 PC8 PC8 IO
41 PC9 PC9 IO
42 PA8 PA8 ARD_D7 - IO
43 PA9 PA9 ARD_D8 - IO
44 PA10 PA10 ARD_D2 - IO
45 PA11 PA11 IO
46 PA12 PA12 IO
47 VSS GND GND
48 VDD VDD VDD voltage supply
49 PA13 T_SWDIO T_SWDIO
50 PA14 T_SWCLK T_SWCLK
51 PA15 T_JTDI T_JTDI / I2C1_SCL
52 PC10 PC10 IO
53 PC11 PC11 IO
54 PC12 PC12 IO
55 PD2 D2 IO
56 PB3 PB3 ARD_D3 - TIM2_CH2 / T_SWO
57 PB4 PB4 ARD_D5 - TIM3_CH1 / IO
58 PB5 PB5 ARD_D4 - IO
59 PB6 PB6 ARD_D10 - SPIx_CS / TIM4_CH1
60 PB7 PB7 IO
61 PB8-BOOT0 BOOT0 BOOT0
62 PB9 PB9 ARD_D14 - I2C1_SDA
63 VSS GND GND
64 VDD VDD VDD voltage supply
1. The default configuration is shown in bold.
(1)
UM2505 - Rev 2
page 35/43
Page 36
9 Limitation
Issue observed
The OPAMP offset value is minimized using a trimming circuitry. At startup, the trimming values are initialized with
the preset factory trimming values. The trimming values of OPAMP1, OPAMP2 and OPAMP4 are not programmed
correctly, resulting in a large offset compared to the one specified.
Proposed workaround
The offset values of OPAMP1, OPAMP2 and OPAMP4 must be calibrated by software, applying the calibration
procedure described in the STM32G4 Series advanced Arm®-based 32-bit MCUs reference manual (RM0440), in
the Calibration section of the Operational amplifiers (OPAMP) chapter. Such a procedure is already implemented
in the STM32CubeG4 MCU Package.
Parts impacted
This applies only to the MB1367-based NUCLEO-G474RE boards within the following range of serial numbers:
A191300001-A191304602.
UM2505
Limitation
UM2505 - Rev 2
page 36/43
Page 37
UM2505
Federal Communications Commission (FCC) and Industry Canada (IC) Compliance Statements
10 Federal Communications Commission (FCC) and Industry Canada
(IC) Compliance Statements
10.1 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.
10.2
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
IC Compliance Statement
Industry Canada ICES-003 Compliance Label: CAN ICES-3 (B) / NMB-3 (B).
UM2505 - Rev 2
page 37/43
Page 38
Revision history
UM2505
Table 18. Document revision history
Date Version Changes
28-Mar-2019 1 Initial release.
17-Apr-2019 2 Added the Limitation section.
UM2505 - Rev 2
page 38/43
Page 39
UM2505
Contents
Contents
1 Features ...........................................................................2
2 Ordering information ..............................................................3
2.1 Product marking ...............................................................3
2.2 Codification ...................................................................3
3 Development environment .........................................................4
3.1 System requirements ...........................................................4
3.2 Development toolchains .........................................................4
3.3 Demonstration software .........................................................4
4 Conventions.......................................................................5
5 Quick start ........................................................................6
5.1 Getting started .................................................................6
6 Hardware layout and configuration.................................................7
6.1 PCB layout ....................................................................7
6.2 Mechanical drawing ............................................................9
6.3 Embedded STLINK-V3E .......................................................10
6.3.1 Drivers ............................................................... 11
6.3.2 STLINK-V3E firmware upgrade............................................. 11
6.3.3 Using an external debug tool to program and debug the on-board STM32 ............ 11
6.4 Power supply .................................................................13
6.4.1 Debugging while using VIN or EXT as an external power supply ...................21
6.5 Clock sources ................................................................22
6.5.1 HSE clock (high-speed external clock) .......................................22
6.5.2 LSE clock (low-speed external clock) – 32.768 kHz .............................22
6.6 Board functions ...............................................................22
UM2505 - Rev 2
6.6.1 LEDs.................................................................23
6.6.2 Push-buttons...........................................................23
6.6.3 MCU voltage selection on VREF+...........................................23
6.6.4 Current consumption measurement (IDD).....................................24
6.6.5 Virtual COM port (VCP): LPUART and USART .................................24
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Contents
6.7 Solder bridges ................................................................24
7 Board connectors ................................................................28
7.1 STLINK-V3E USB Micro-B connector CN1 ........................................28
7.2 MIPI10 connector CN4 .........................................................28
7.3 Arduino™ Uno V3 connectors CN5, CN6, CN8 and CN9.............................29
7.4 ST morpho connectors CN7 and CN10 ...........................................31
8 STM32G4 Nucleo-64 I/O assignment ..............................................34
9 Limitation ........................................................................36
10 Federal Communications Commission (FCC) and Industry Canada (IC) Compliance
Statements .......................................................................37
10.1 FCC Compliance Statement ....................................................37
10.2 IC Compliance Statement ......................................................37
Revision history .......................................................................38
Contents ..............................................................................39
List of tables ..........................................................................41
List of figures..........................................................................42
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List of tables
List of tables
Table 1. List of available products...............................................................3
Table 2. Codification explanation ...............................................................3
Table 3. ON/OFF convention ..................................................................5
Table 4. Jumper configuration .................................................................6
Table 5. MIPI10 / STDC14 debug connector (CN4).................................................. 12
Table 6. External power sources: VIN (7 V - 12 V) .................................................. 16
Table 7. External power sources: E5V (5 V)....................................................... 17
Table 8. External power sources: 5V_CHGR (5 V) .................................................. 19
Table 9. External power sources: 3V3 ........................................................... 20
Table 10. USART1 connection................................................................. 24
Table 11. LPUART1 connection ................................................................ 24
Table 12. Solder bridge configuration ............................................................ 25
Table 13. USB Micro-B connector CN1 pinout ...................................................... 28
Table 14. MIPI10 connector CN4 pinout (STDC14 pinout compatible) ...................................... 29
Table 15.
Table 16. Pin assignment of the ST morpho connectors ............................................... 32
Table 17. Nucleo-64 I/O assignment............................................................. 34
Table 18. Document revision history ............................................................. 38
Arduino™ connectors pinout ...........................................................30
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List of figures
List of figures
Figure 1. NUCLEO-G474RE top view ...........................................................1
Figure 2. NUCLEO-G474RE bottom view ........................................................ 1
Figure 3. Hardware block diagram .............................................................7
Figure 4. Top layout .......................................................................8
Figure 5. Bottom layout .....................................................................9
Figure 6. STM32G4 Nucleo 64 board mechanical drawing (in millimeter) .................................. 10
Figure 7. USB composite device.............................................................. 11
Figure 8. Connecting an external debug tool to program the on-board STM32G4 ............................ 12
Figure 9. STM32G4 Nucleo-64 board power tree .................................................. 14
Figure 10. Power supply input from STLINK-V3E USB connector with PC (5 V, 500 mA max) .................... 15
Figure 11. Power supply input from VIN (7 V - 12 V, 800 mA max) .......................................17
Figure 12. Power supply input from 5V_EXT (5 V, 500 mA max) ......................................... 18
Figure 13. Power supply input from ST-LINK USB connector with USB charger (5 V) .......................... 19
Figure 14. Power supply input from external 3V3 ................................................... 21
Figure 15. USB Micro-B connector CN1 (front view) ................................................. 28
Figure 16. MIPI10 connector CN4 ............................................................. 28
Figure 17.
Figure 18.
Figure 19. ST morpho connectors ............................................................. 32
Arduino™ connectors............................................................... 29
Arduino™ and ST morpho connectors pinout .............................................. 30
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UM2505
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UM2505 - Rev 2
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