STMicroelectronics Discovery MCU Development Kit STM32F3348-DISCO

The 32F3348DISCOVERY Discovery kit helps you to discover the digital power features of the STM32F334 microcontrollers. The board assists the user in developing applications with everything required to start quickly.
Features include is an ST-LINK/V2-1 embedded debug tool interface, high brightness LED dimming with buck converter, buck/boost converter, LEDs and push buttons.

STM32F334C8T6 microcontroller featuring 64 KB of Flash memory, 12 KB RAM in an LQFP48 package
On-board ST-LINK/V2-1 debugger/programmer with selection mode switch and SWD connector
ARM mbed-enabled (mbed.org)
Virtual Com port, Mass storage, and Debug port interfaces supported on USB
USB bus power supply or from an external 5 V supply
High brightness LED dimming with buck converter
Buck / Boost converter
Six LEDs: Power on, USB communication, and four different colour user LEDs
USER and RESET Push Buttons
Extension connection header for LQFP48 Inputs/Outputs
Comprehensive free software including various examples

The STM32 F3 series of mixed-signal MCUs with DSP and FPU instructions combines a 32-bit ARM Cortex-M4 core running at 72MHz with an advanced analogue peripheral set.