This part is a kind of semiconductor called STM32F401RE.

Function of this product has ARM Cortex-M4 32b MCU+FPU.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

STM32F401xD STM32F401xE ARM® Cortex®-M4 32b MCU+FPU, 105 DMIPS, 512KB Flash/96KB RAM, 11 TIMs, 1 ADC, 11 comm. interfaces Datasheet - production data Features • Core: ARM® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait state execution from Flash memory, frequency up to 84 MHz, memory protection unit, 105 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSP instructions • Memories – up to 512 Kbytes of Flash memory – up to 96 Kbytes of SRAM • Clock, reset and supply management – 1.7 V to 3.6 V application supply and I/Os – POR, PDR, PVD and BOR – 4-to-26 MHz crystal oscillator – Internal 16 MHz factory-trimmed RC – 32 kHz oscillator for RTC with calibration – Internal 32 kHz RC with calibration • Power consumption [ ... ]

STM32F401RE PDF Datasheet Download