This part is a kind of semiconductor called RM0008.

Function of this product has Reference manual.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

RM0008 Reference manual STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and STM32F107xx advanced ARM®-based 32-bit MCUs Introduction This reference manual targets application developers. It provides complete information on how to use the STM32F101xx, STM32F102xx, STM32F103xx and STM32F105xx/STM32F107xx microcontroller memory and peripherals. The STM32F101xx, STM32F102xx, STM32F103xx and STM32F105xx/STM32F107xx will be referred to as STM32F10xxx throughout the document, unless otherwise specified. The STM32F10xxx is a family of microcontrollers with different memory sizes, packages and peripherals. For ordering information, mechanical and electrical device characteristics please refer to the low-, medium-, high- and XL-density STM32F101xx and STM32F103xx datasheets, to the low- and medi [ ... ]

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