STMicroelectronics STM32H7 User manual

June 2023 UM2407 Rev 3 1/49
1
UM2407
User manual
STM32H7 Nucleo-144 boards (MB1364)
Introduction
The STM32H7 Nucleo-144 boards, based on the MB1364 reference board (NUCLEO-
H723ZG, NUCLEO-H743ZI (order code NUCLEO-H743ZI2), and NUCLEO-H753ZI),
provide 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 STM32H7 series microcontroller. The ST Zio
connector, which extends 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 STM32H7 Nucleo-144 boards do not
require any separate probe as they integrate the STLINK-V3E debugger/programmer. The
STM32H7 Nucleo-144 boards come with comprehensive free software libraries and
examples available with the STM32Cube MCU Package.
Note: For NUCLEO-H743ZI (STM32H7 Nucleo-144 (MB1137) - order code NUCLEO-H743ZI),
refer to UM1974.
Pictures are not contractual.
Figure 1. Nucleo-144 board (top view) Figure 2. Nucleo-144 board (bottom view)
www.st.com

Contents UM2407
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Contents
1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Codification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Development environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1 Nucleo-144 board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2 Mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3 Embedded STLINK-V3E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.3.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.3.2 STLINK-V3E firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3.3 Using an external debug tool to program and debug the on-boards
STM32H7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.4 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4.1 Power supply input from STLINK-V3E USB connector (default setting) 19
6.4.2 External power supply input from VIN (7 to 12 V, 800 mA max) . . . . . . 20
6.4.3 External power supply input 5V_EXT (5 V, 500 mA max) . . . . . . . . . . . 21
6.4.4 External power supply input from a USB charger (5 V) . . . . . . . . . . . . . 22
6.4.5 External power supply input from 3V3_EXT (3.3 V) . . . . . . . . . . . . . . . 22
6.4.6 Debugging while using VIN or EXT as an external power supply . . . . . 23
6.5 Clock sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.5.1 HSE clock (high-speed external clock) . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.5.2 LSE clock (low-speed external clock) - 32.768 kHz . . . . . . . . . . . . . . . . 25
6.6 Board functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

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UM2407 Contents
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6.6.1 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.6.2 Push-buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.6.3 MCU voltage selection: 1V8/3V3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.6.4 Current consumption measurement (IDD) . . . . . . . . . . . . . . . . . . . . . . . 26
6.6.5 Virtual COM port (VCP): LPUART/USART . . . . . . . . . . . . . . . . . . . . . . 26
6.6.6 USB OTG_FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.6.7 Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.7 Solder bridges and jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7 Board connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.1 STLINK-V3E USB Micro-B connector (CN1) . . . . . . . . . . . . . . . . . . . . . . 34
7.2 USB OTG_FS connector (CN13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.3 Ethernet RJ45 connector (CN14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8 Extension connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.1 ST Zio connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 ST morpho connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9 Nucleo-144 boards (MB1364) information . . . . . . . . . . . . . . . . . . . . . . 43
9.1 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.2 Nucleo-144 boards (MB1364) product history . . . . . . . . . . . . . . . . . . . . . 44
9.3 Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10 Federal Communications Commission (FCC) and
ISED Canada Compliance Statements . . . . . . . . . . . . . . . . . . . . . . . . . 46
10.1 FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10.2 ISED Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

List of tables UM2407
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List of tables
Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2. Codification explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Jumper configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 5. MIPI-10 debug connector (CN5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 6. External power sources: VIN (7 to 12 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 7. External power sources: 5V_EXT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 8. External power sources: CHGR (5 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 9. External power sources: 3V3_EXT (3.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 10. USART3 connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 11. LPUART1 connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 12. USB pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 13. Ethernet pin configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 14. Solder bridge and jumper configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 15. USB Micro-B connector (CN1) pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 16. USB OTG_FS Micro-AB connector (CN13) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 17. Ethernet RJ45 connector (CN14) pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 18. ZIO connector (CN7) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 19. ZIO connector (CN8) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 20. ZIO connector (CN9) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 21. ZIO connector (CN10) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 22. Pin assignment of the ST morpho connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 23. Product history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 24. Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 25. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

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UM2407 List of figures
5
List of figures
Figure 1. Nucleo-144 board (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Nucleo-144 board (bottom view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 3. Hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4. Nucleo-144 board top layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 5. Nucleo-144 bottom layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6. Nucleo-144 board mechanical drawing in millimeters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 7. Nucleo-144 board mechanical drawing in mils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8. USB composite device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 9. Connecting an external debug tool to program the on-board STM32H7 . . . . . . . . . . . . . . 18
Figure 10. Power supply input from STLINK-V3E USB connector with PC (5 V, 500 mA max) . . . . . 20
Figure 11. Power supply input from VIN (7 to 12 V, 800 mA max) . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 12. Power supply input from 5V_EXT (5 V, 500 mA max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 13. Power supply input from STLINK-V3E USB connector with a USB charger (5 V) . . . . . . . 22
Figure 14. Power supply input from 3V3_EXT (3.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15. Ethernet RJ45 connector (CN14) front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 16. NUCLEOH7 Nucleo-144 board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Features UM2407
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1 Features
The STM32H7 Nucleo-144 boards offer the following features:
•STM32H7 Arm®(a) Cortex®core-based microcontroller in an LQFP144 package
•Ethernet compliant with IEEE-802.3-2002 (depending on STM32H7 support)
•USB OTG full-speed
•3 user LEDs
•2 push-buttons: USER and RESET
•LSE crystal:
– 32.768 kHz crystal oscillator
•Board connectors:
– USB with Micro-AB
– Ethernet RJ45
–MIPI-10
– ST Zio including ARDUINO®Uno V3 expansion connectors
– ST morpho expansion connector
•Flexible power supply options: ST-LINK USB VBUS or external sources
•On-board STLINK-V3E debugger/programmer with SWD connector:
– USB reenumeration capability: Virtual COM port, mass storage, debug port
– STLINK-V3E standalone kit capability
•Comprehensive free software libraries and examples available with the STM32Cube
package
•Support of a wide choice of Integrated Development Environments (IDEs) including
IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE
a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

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UM2407 Ordering information
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2 Ordering information
To order the Nucleo-144 board corresponding to the targeted STM32, use the order code
given below in Tabl e 1:
2.1 Codification
The meaning of the codification is explained in Table 2. The order code is mentioned on a
sticker placed on the top or bottom side of the board.
Table 1. Ordering information
Order code Board reference Target STM32H7 Differentiating feature
NUCLEO-H723ZG
MB1364
STM32H723ZGT6 -
NUCLEO-H743ZI2 STM32H743ZIT6 -
NUCLEO-H753ZI STM32H753ZIT6 Cryptography
Table 2. Codification explanation
NUCLEO-XXYYZTN Description Example: NUCLEO-H743ZI2
XX MCU series in STM32 32-bit Arm Cortex
MCUs STM32H7 series
YY MCU product line in the series STM32H743
Z STM32 package pin count 144 pins
T
STM32H7 flash memory size:
-G for 1 Mbyte
-I for 2 Mbytes
2 Mbytes
N Board version: void or 2 STLINK-V3E

Development environment UM2407
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3 Development environment
3.1 System requirements
•Multi-OS support: Windows®10, Linux®64-bit, or macOS®(a)(b)(c)
•USB Type-A to Micro-B cable
3.2 Development toolchains
•IAR Systems®- IAR Embedded Workbench®(d)
•Keil®- MDK-ARM(d)
•STMicroelectronics - STM32CubeIDE
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.
a. macOS is a trademark of Apple Inc., registered in the U.S. and other countries and regions.
b. Linux is a registered trademark of Linus Torvalds.
c. Windows is a trademark of the Microsoft group of companies.
d. On Windows®only.

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48
4 Conventions
Table 3 provides the conventions used for the ON and OFF settings in the present
document.
In this document, for any information that is common to all sales types, the references are
noted as the STM32H7 Nucleo-144 board and STM32H7 Nucleo-144 boards.
Table 3. ON/OFF conventions
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 Ωresistor
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

Quick start UM2407
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5 Quick start
The STM32H7 Nucleo-144 board is a low-cost and easy-to-use development kit, used to
evaluate and start development quickly with an STM32H7 series microcontroller in an
LQFP144 package.
Before installing and using the product, accept the evaluation product license agreement
(EPLA) from the www.st.com/epla web page. For more information on the STM32H7
Nucleo-144 and demonstration software, visit the www.st.com/stm32nucleo web page.
5.1 Getting started
Follow the sequence below to configure the Nucleo-144 board and launch the
demonstration application (for components location, refer to Figure 4):
1. Check the jumper position on the board:
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. Power the board by connecting the STM32H7 Nucleo-144 board to a PC with a USB
Type-A to Micro-B cable through the USB connector (CN1) on the ST-LINK. As a result,
the PWR green LED (LD5) and COM LED (LD4) light up and the red LED (LD3) blinks.
4. Press B1 (left button).
5. Observe the blinking frequency of the three LEDs LD1 to LD3 changes, by clicking on
the B1 button.
6. The software demonstration and the several software examples that allow the user to
use the Nucleo features, are available at the www.st.com/stm32nucleo web page.
7. Develop an application, using the available examples.
Table 4. Jumper configuration
Jumper Definition Position Comment
JP1 STLK_RST OFF -
JP2 Power source selection ON [1-2] 5V_USB_STLK (from ST-LINK)
JP3 T_NRST ON -
JP4 IDD measurement ON MCU current measurement
JP5 VDD_MCU power selection ON [1-2] (default) VDD_MCU supplied with 3V3_VDD
ON [2-3] (optional) VDD_MCU supplied with 1V8_VDD

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48
6 Hardware layout and configuration
The STM32H7 Nucleo-144 board is designed around the STM32H7 series microcontrollers
in a 144-pin LQFP package.
Figure 3 shows the connections between the STM32H7 and its peripherals (STLINK-V3E,
push-buttons, LEDs, USB, Ethernet, ST Zio connectors, and ST morpho headers).
Figure 4 and Figure 5 show the location of these features on the STM32H7 Nucleo-144
board.
The mechanical dimensions of the board are shown in Figure 6 and Figure 7.
Figure 3. Hardware block diagram
MSv51396V1
Embedded
STLINK-V3E
STM32
Microcontroller
ST morpho extension header ST morpho extension header
IO
VCP
UART
B2
reset
button
B1
user
button
IO
Zio Connector
ST-LINK part
MCU part
LED1
LED2
LED3
Micro-AB
USB
connector
Zio Connector
RJ45
connector
Micro-B
USB
connector
SWD
SWD VCP
UART
USB RMII

Hardware layout and configuration UM2407
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6.1 Nucleo-144 board layout
Figure 4. Nucleo-144 board top layout
MSv62197V3
ST-LINK RST (JP1)
User USB connector (CN13)
ST-LINK micro USB connector (CN1)
ST-LINK overcurrent LED (LD6)
(red)
COM LED (LD4)
(red/green)
Power LED (LD5)
(green)
Power source selection (JP2)
ZIO connector (CN7)
ST morpho pin header (CN12)
ZIO connector (CN10)
Reset button (B2)
Ethernet RJ45 connector (CN14)
DFU connector (CN2)
User button (B1)
USB overcurrent LED (LD7)
USB VBUS LED (LD8)
ZIO connector (CN9)
ST morpho pin header (CN11)
STM32 microcontroller (U14)
ZIO connector (CN8)
VDD_MCU Power selection (JP5)
IDD measurement (JP4)
MCU RST (JP3)
User LEDs (LD1-LD3)
MIPI connector (CN5)

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48
Figure 5. Nucleo-144 bottom layout
MSv51398V3
IOREF Power selection
(SB10, SB11, and SB20)

Hardware layout and configuration UM2407
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6.2 Mechanical drawing
Figure 6. Nucleo-144 board mechanical drawing in millimeters

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48
Figure 7. Nucleo-144 board mechanical drawing in mils

Hardware layout and configuration UM2407
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6.3 Embedded STLINK-V3E
There are two different ways to program or debug the on-board STM32H7 MCU:
•Using the embedded STLINK-V3E
•Using an external debug tool connected to the MIPI-10 connector (CN5).
The STLINK-V3E programming and debugging tool is integrated into the STM32H7 Nucleo-
144 board.
The embedded STLINK-V3E supports only SWD and VCP for STM32H7 devices. For
information about debugging and programming features, refer to the technical note
Overview of ST-LINK derivatives (TN1235), which describes in detail all the STLINK/V3
features.
Features supported on STLINK-V3E:
•5 V power supplied by a 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 5V tolerant inputs
–JTAG
– SWD and serial viewer (SWV) communication
•STDC14 (MIPI-10) compatible connector (CN5)
•Status COM LED (LD4) which blinks during communication with the PC
•Fault red LED (LD6) alerting on USB overcurrent request
•5 V/300 mA output power supply capability (U2) with current limitation and LED
•Green LED ON: 5V enabled (LD5)
6.3.1 Drivers
Before connecting the Nucleo-144 board to a Windows®PC via USB, a driver for STLINK-
V3E must be installed (not required for Windows®10). The toolset supporting ST-LINK
automatically installs the driver. It is also available from the www.st.com website.
In case the STM32H7 Nucleo-144 board is connected to the PC before installing the driver,
the PC device manager might report some Nucleo interfaces as Unknown.
To recover from this situation, after installing the dedicated driver, the association of
Unknown USB devices found on the STM32H7 Nucleo-144 board to this dedicated driver
must be updated in the device manager manually.
Note: ST recommends the use of a USB composite device, as shown in Figure 8.

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Figure 8. USB composite device
Note: 37xx = 374E for STLINK-V3E without bridges functions
374F for STLINK-V3E with bridges functions
6.3.2 STLINK-V3E firmware upgrade
The STLINK-V3E embeds a firmware upgrade mechanism for an in-place upgrade through
the USB port. As the firmware might evolve during the lifetime of the STLINK-V3E product
(for example new functionalities, bug fixes, and support for new microcontroller families), ST
recommends keeping the STLINK-V3E firmware up to date before starting to use the
STM32H7 Nucleo-144 board. The latest version of this firmware is available from the
www.st.com website.
6.3.3 Using an external debug tool to program and debug the on-boards
STM32H7
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 lights RED. Then connect your
external debug tool through the MIPI-10 debug connector (CN5).
2. Set the embedded STLINK-V3E in the high-impedance state:
When the STLK_RST jumper (JP1) is ON, the embedded STLINK-V3E is in the
RESET state, and all GPIOs are in high impedance. Then it is possible to connect the
external debug tool to the debug connector (CN5).
37xx

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Figure 9. Connecting an external debug tool to program the on-board STM32H7
Table 5. MIPI-10 debug connector (CN5)
MIPI-10
Pin
STDC14
Pin CN5 Designation
-1NCReserved
-2NCReserved
13T_VCCTarget VCC
24T_SWDIO
Target SWDIO using SWD protocol or target JTMS (T_JTMS)
using JTAG protocol
35GNDGround
46T_SWCLK
Target SWCLK using SWD protocol or target JCLK (T_JCLK)
using JTAG protocol
57GNDGround
68T_SWO
Target SWO using SWD protocol or target JTDO (T_JTMS)
using JTAG protocol
7 9 T_JRCLK Not used by SWD protocol, target JRCLK (T_JRCLK) using
JTAG protocol, only for specific use
810T_JTDI
Not used by SWD protocol, target JTDI (T_JTDI) using JTAG
protocol, only for external tools
9 11 GNDDetect GND detection signal for plug indicator, used on SWD and
JTAG neither
10 12 T_NRST Target NRST using SWD protocol or target JTMS (T_JTMS)
using JTAG protocol
MSv61202V3
Power supply selection
STLINK-V3E USB connector
STLK_RST (JP1)
External debug tool

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6.4 Power supply
Five different sources can provide the power supply:
•A host PC connected to CN1 through a USB cable (default setting)
•An external 7 to 12 V power supply connected to CN8 pin 15 or CN11 pin 24
•An external 5 V power supply connected to CN11 pin 6
•An external 5 V USB charger (5V_USB_CHGR) connected to CN1
•An external 3.3 V power supply (3V3) connected to CN8 pin 7 or CN11 pin 16
Either the host PC through the USB cable, or an external source VIN (7 to 12 V), E5V (5 V),
or +3.3 V power supply pins on CN8 or CN11, provides the power supply. In case VIN, E5V,
or +3.3 V is used to power the Nucleo-144 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.
In case the power supply is +3.3 V, the STLINK-V3E is not powered and cannot be used.
6.4.1 Power supply input from STLINK-V3E USB connector (default setting)
The 5 V signal on the STLINK-V3E USB connector (CN1) can power the STM32H7 Nucleo-
144 board and its shield. Use the JP2 [1-2] configuration of the STLINK jumper (refer to
Figure 10).
This is the default setting.
-13T_VCP_RX Target RX used for VCP (must be UART dedicated to
bootloader)
-14T_VCP_TX Target TX used for VCP (must be UART dedicated to
bootloader)
Table 5. MIPI-10 debug connector (CN5) (continued)
MIPI-10
Pin
STDC14
Pin CN5 Designation

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Figure 10. Power supply input from STLINK-V3E USB connector with PC (5 V, 500 mA max)
If the USB enumeration succeeds, the 5V_ST_LINK power is enabled, by asserting the
PWR_ENn signal from STM32F723IEK6 ‘STLINK-V3E’ (U7). This pin is connected to a
power switch (U2), which powers the board. The power switch (U2) features also a current
limitation to protect the PC in case of short-circuit onboard. If an overcurrent (more than
500 mA) happens onboard, the red LED (LD6) is lit.
The STLINK-V3E USB connector (CN1) can power the Nucleo board with its shield.
However, the STLINK-V3E 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 asks for 500 mA power to the host PC.
•If the host can provide the required power, the enumeration finishes with a
SetConfiguration command. Then, the power switch and the green LED (LD5) are
turned ON. Thus, the Nucleo board and its shield can consume 500 mA current, but no
more.
•If the host is not able to provide the requested current, the enumeration fails.
Therefore, the power switch (U2) 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.
Warning: In case the maximum current consumption of the STM32H7
Nucleo-144 board and its shield boards exceed 300 mA, it is
mandatory to power the STM32H7 Nucleo-144 board, using
an external power supply connected to E5V, VIN, or +3.3 V.
6.4.2 External power supply input from VIN (7 to 12 V, 800 mA max)
When the STM32H7 Nucleo-144 board is power supplied by VIN (refer to Table 6 and
Figure 11), the jumper (JP2) configuration must be [3-4] VIN.
MSv61203V2
U7
STM32F723
STLINK-V3
CN1
U2
5V
3V3
PC
3V3