ST STM32G4 Nucleo-64 User Manual

• 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
(1)
Feature
(1)
SB13, SB19: ON
SB12, SB20, SB18, SB22: OFF
USART1 (PC4/PC5) connected to Arduino
™
(D1 & D0) and
ST morpho connector (CN10 pin 35 & 37).
SB12, SB20: ON
SB13, SB19, SB17, SB23: OFF
USART1 (PC4/PC5) connected to STLINK-V3E Virtual COM
port.
1. The default configuration is shown in bold
Table 11. LPUART1 connection
Solder bridge configuration
(1)
Feature
(1)
SB17, SB23: ON
SB18, SB22, SB12, SB20: OFF
LPUART1 (PA2/PA3) connected to STLINK-V3E Virtual
COM port.
SB18, SB22: ON
SB17, SB23, SB13, SB19: OFF
LPUART1 (PA2/PA3) connected to Arduino
™
(D1 & D0) and
ST morpho connector (CN10 pin 35 & 37).
1. The default configuration is shown in bold
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
6.7
Solder bridges
All 41 solder bridges are located on the bottom layer of the STM32G4 Nucleo-64 board.
UM2505
Solder bridges
UM2505 - Rev 2
page 24/43

ST STM32G4 Nucleo-64 Specifications

General

Core	ARM Cortex-M4
Operating Frequency	Up to 170 MHz
Flash Memory	128 KB
SRAM	32 KB
Analog Input Channels	Up to 16
Analog Output Channels	2
Debug Interface	ST-LINK/V2-1
Microcontroller	STM32G4
ADC	12-bit
DAC	12-bit
Communication Interfaces	USART, SPI, I2C, CAN, USB
Operating Voltage	3.3V
Board Connectors	Arduino Uno V3

Summary

Features

Development environment

Development toolchains

Lists the recommended software development toolchains.

Quick start

Getting started

Step-by-step guide to configure and launch the demonstration application on the board.

Hardware layout and configuration

Embedded STLINK-V3E

Drivers

Instructions for installing drivers for the STLINK-V3E debugger.

STLINK-V3E firmware upgrade

Information on upgrading the firmware of the embedded STLINK-V3E.

Using an external debug tool to program and debug the on-board STM32

Methods for using external debug tools with the board.

Power supply

Debugging while using VIN or EXT as an external power supply

Procedure for debugging when using external power sources.

Clock sources

HSE clock (high-speed external clock)

LSE clock (low-speed external clock) – 32.768 kHz

Board functions

MCU voltage selection on VREF+

Virtual COM port (VCP): LPUART and USART

Board connectors

STLINK-V3E USB Micro-B connector CN1

MIPI10 connector CN4

Arduino™ Uno V3 connectors CN5, CN6, CN8 and CN9

ST morpho connectors CN7 and CN10

STM32G4 Nucleo-64 I/O assignment