Description: Brand new and high quality Features: The most basic circuit based on MCU is on board, such as crystal oscillator circuit, USB power supply, and USB interface. With SWD simulation debugging download interface, this interface requires at least 3 wires to complete the debugging download task. Compared with traditional JTAG debugging, there are many advantages. JTAG is now a trend to be eliminated, such as-ST The newly released M0 series MCU only retains the SWD debugging interface, and JTAG is directly canceled. It uses the Mirco USB interface currently used for smartphones, which is easy to use and can be used for USB communication and power supply. In response to the problem of STM32 RTC not being able to swing, we adopted the officially recommended low-power solution for RTC crystal oscillators and used Epson's 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 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-bit/16-channel) Timer: 3 general timers and 1 advanced timer Debug Download: supports JTAG/SWD interface debugging download, supports IAP RT9193: 3.3V voltage regulator chip, maximum output current 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