ST STM32 Nucleo-64 User Manual

UM2324 Rev 2 21/44
UM2324 Hardware layout and configuration
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the enumeration succeeds, thanks to the external power source. The following power
sequence procedure must be respected:
1. Connect jumper JP2 between pins 3 and 4 for VIN or pins 5 and 6 for E5V
2. Connect the external power source to VIN or E5V
3. Power ON the external power supply 7 V < VIN < 12 V to VIN, or 5 V for E5V
4. Check that the green LED LD3 is turned ON
5. Connect the PC to the USB connector CN2
If this sequence is not respected, the board may be powered by VBUS first from the ST-
LINK, with the following risks:
• If more than 500 mA current is needed by the board, the PC may be damaged or the
current supplied may be limited by the PC. As a consequence the board is not powered
correctly.
• 500 mA is requested at the enumeration (since SB15 must be OFF): this request is
rejectable and the enumeration does not succeed if the PC does not provide such
current, consequently the board is not power supplied (LED LD3 remains OFF).
6.7 OSC clock sources
Three clock sources are listed below:
• LSE which is the 32.768 kHz crystal for the STM32 embedded RTC
• MCO which is the 8 MHz clock from the ST-LINK MCU for the STM32 microcontroller
• HSE which is the 8 MHz oscillator for the STM32 microcontroller. This clock is not
implemented on the STM32 NUCLEO-G070RB or NUCLEO-G071RB board
6.7.1 LSE: OSC 32 kHz clock supply
There are three ways to configure the pins corresponding to the low-speed clock (LSE):
1. LSE on-board X2 crystal (Default configuration). Refer to crystal design guide for
STM8S, STM8A and STM32 microcontrollers Application note (AN2867) for crystal
design guide for STM32 microcontrollers. It is recommended to use NX3215SA
manufactured by NDK (32.768
kHz, 6 pF, 20 ppm).
2. Oscillator from external to PC14 input: from external oscillator through pin 25 of the
CN7 connector. The following configuration is needed:
–SB23 ON
– R31 and R32 removed
3. LSE not used: PC14 and PC15 are used as GPIOs instead as low-speed clock.The
following configuration is needed:
– SB23 and SB24 ON
– R31 and R32 removed

ST STM32 Nucleo-64 Specifications

General

Operating Voltage	3.3 V
Arduino Compatibility	Yes
Arduino Uno V3 Connectivity Support	Yes
ST Morpho Headers	Yes
USB	Yes
mbed Enabled	Yes
Microcontroller	STM32
Package	LQFP
Core	ARM Cortex-M
Input Voltage	7V to 12V (recommended)
Digital I/O Pins	Varies by model
Analog Input Pins	Varies by model
Flash Memory	Varies by model
SRAM	Varies by model
Clock Speed	Varies by model
Power Supply	USB or external power source
Integrated Debugger/Programmer	ST-LINK/V2-1
On-board debugger	Yes
CAN	Varies by model
Ethernet	Varies by model

Summary

Introduction

Features

Product marking

Details on evaluation tool markings and specific device version.

Ordering information

Information on part numbers for ordering STM32 Nucleo-64 boards.

Conventions

Defines conventions for ON/OFF settings and references in the document.

Quick start

Getting started

Step-by-step guide to begin development with the STM32 Nucleo-64 board.

System requirements

Lists necessary software and hardware for board usage.

Development toolchains

Specifies compatible software development tools for the board.

Hardware layout and configuration

NUCLEO-G070RB or NUCLEO-G071RB board mechanical drawing

Diagram showing physical layout and dimensions of the Nucleo board.

Default board configuration

Details the default settings for jumpers on the board.

Cut able PCB

Information on separating the ST-Link part from the target MCU part.

Embedded ST-LINK/V2-1

Describes the integrated ST-LINK/V2-1 debugger/programmer.

Power supply and power selection

Details the board's power supply options and selection methods.

Programming/debugging when the power supply is not from ST-LINK

Procedure for debugging when using external power sources.

OSC clock sources

Details available clock sources for the STM32 microcontroller.

Reset sources

Lists the various sources that can trigger a reset on the board.

UART2 communication

Describes UART2 interface connection options.

LEDS

Explanation of the board's LEDs and their functions.

Push buttons

Information on the user and reset push buttons.

IDD measurement

Procedure for measuring STM32 microcontroller current consumption.

Jumper configuration

Details various jumper settings and their effects.

Configuration of the solder bridges

Describes solder bridge configurations and their settings.

Connectors

USB Micro-B connector CN2

Details the USB connector for ST-LINK and PC connection.

Arduino Uno V3 connectors

Describes the Arduino Uno V3 compatible connectors.

ST morpho connectors CN7 and CN10

Details the ST morpho connectors for expanded access.

Appendix A NUCLEO-G070RB or NUCLEO-G071RB I/O assignment

Appendix B Electrical schematics