ITEM NAME:STM32F103C8T6 ARM Mini System Development STM32 Microcontroller Module Board Product Description Description: Features: STM32F103C8 main chip. SMD 8M crystal (through the chip internal PLL up to 72M) ST official standard parameters. LM1117-3.3V regulator chip provides a maximum of 800mA current. All the way mini USB port, the system can be.All the way mini USB port, the system can be powered version, aside USB communication. BOOT select the port. A functional indicator, used to validate the basic functions of the IO port. A power indicator.