The STM32 Nucleo-64 boards provide an affordable and flexible way for users to try out new concepts and build prototypes with the STM32 microcontrollers, choosing from various combinations of performance, power consumption and features. For the compatible boards, the SMPS significantly reduces power consumption in Run mode.
The Arduino Uno V3 connectivity support and the ST morpho headers allow the 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 ST-LINK/V2-1 debugger and programmer.
The STM32 Nucleo-64 board comes with the STM32 comprehensive software HAL library together with various packaged software examples, as well as direct access to the Arm Mbed online resources at

Key Features
STM32 microcontroller in LQFP64 package
External SMPS to generate Vcore logic supply (only available on '-P' suffixed boards)
1 user LED shared with Arduino
1 user and 1 reset push-buttons
32.768 kHz LSE crystal oscillator
Board expansion connectors:
Arduino Uno V3
ST morpho extension pin headers for full access to all STM32 I/Os
External SMPS experimentation dedicated connector (only available on '-P' suffixed boards)
Flexible power-supply options: ST-LINK USB VBUS or external sources
On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability. Three different interfaces supported on USB: mass
storage, Virtual COM port and debug port
Comprehensive free software libraries and examples available with the STM32Cube MCU Package
Support of a wide choice of Integrated Development Environments (IDEs) including IAR, Keil, GCC-based IDEs, Arm Mbed
Arm Mbed Enabled compliant (only for some Nucleo part numbers)