The STM32 Nucleo-144 board provides an affordable and flexible way for users to build prototypes with the STM32 F2 series microcontroller. You can choose from the combinations of performance, power consumption and features.
The STMicroelectronics Zio connector, which is an extension of Arduino Uno, provides access to more peripherals, and with the ST morpho headers expands the functionality with a choice of shields. The integrated ST-LINK/V2-1 debugger/programmer comes with the STM32 comprehensive software HAL library, software examples, as well as direct access to the ARM mbed on-line resources.

On-board with STM32F207ZGT6 microcontroller on LQFP144 package
Full access to all STM32 Inputs/Outputs with ST Zio connector (Arduino Uno Revision 3 connectivity support) and
ST morpho extension pin headers
ARM mbed-enabled (mbed.org)
On-board ST-LINK/V2-1 debugger/programmer with SWD connector
Virtual Com port, Mass storage, and Debug port interfaces supported on USB
Flexible board power supply
USB OTG or device full speed with Micro-AB connector
IEEE-802.3-2002 compliant Ethernet connector
Three LEDs: Power LED, USB communication, User LED
USER and RESET Push Buttons
32.768 KHz crystal oscillator
Supported by Integrated Development Environments (IDEs)

STM32F2 Series 32-Bit ARM® Cortex®-M3 Microcontrollers, STMicroelectronics

The STM32 family of 32-bit Flash Microcontrollers is based on the breakthrough ARM Cortex™-M3 core - a core specifically developed for embedded applications. The STM32 family benefits from the Cortex-M3 architectural enhancements.

120MHz Cortex™-M3 CPU
Excellent real-time behaviour
Oustanding power efficiency
Superior and innovative peripherals
Maximum integration
Cross family pin-to-pin, peripheral and software compatibility