Descirption: brand new and high quality Features: The most basic circuit based on MCU is onboard, such as crystal oscillator circuit, USB power management circuit and USB interface. With SWD simulation debugging download interface, this interface requires at least 3 wires to complete the debugging download task. Compared with the traditional JTAG debugging, there are many advantages. I insert a sentence here. JTAG is now a trend to be eliminated, such as-ST The newly released M0 series MCU only retains the SWD debug interface, and JTAG is directly cancelled. It uses the Mirco USB interface currently used in for smart phones, which is easy to use and can be used for USB communication and power supply. In response to the problem that STM32 RTC cannot oscillate, we adopted the officially recommended low-load RTC crystal oscillator solution and used for Epson brand crystal oscillators instead of cheap cylindrical crystal oscillators. Equipped with high-quality 1x40/2.54mm pitch single-row pin headers to ensure excellent conductive contact and convenient for users to place the core board on a standard universal board or breadboard. The pin headers are not welded by default, and users can choose the welding direction according to their needs. Specification: Model: STM32F103C8T6 Material: Printed Circuit Board Number of Pins: 48 Core: Cortex-M3 Working Frequency: 72MHz Storage Resources: 64K Byte Flash, 20KByte SRAM Interface Resources: 2x SPI, 3x USART, 2x I2C, 1x CAN, 37x I/O port Analog-to-digital Conversion: 2x ADC (12 bits/16 channels) Timer: 3 ordinary timers and 1 advanced timer Debug Download: support JTAG/SWD interface debug download, support IAP RT9193: 3.3V voltage regulator chip, maximum output 300mA Notes: Please allow 1-3mm error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1 Piece Minimum System Development Board Module