: Brand new and high quality. Model: STM32F103C8T6. Core: ARM 32 Cortex-M3 CPU. Debug mode: SWD. Size:5.3cm x 2.2cm. 1. Up to 72MHz operating frequency, at 0 wait weeks in memory. It can reach 1.25 DMips//MHz during the first visit 2. One-cycle multiplication and hardware division 3. 64K flash program storage 4. 20K byte SRAM 5. 2.0 ~ 3.6 V power supply and/o pin 6. Power-on and power-off reset (POR/PDR, programmable voltage detection) Device (PVD) 7. 4 ~ 16MHz Crystal Oscillator 8. Embedded factory-tuned 8MHz RC oscillator 9. Embedded 40 10. PLL for CPU clock production 11. 32 KHZ RTC Oscillator with Calibration 12. Sleep, downtime and standby modes 13. VBAT Powers RTC and Backup Registers 14. 2 12-bit analog-to-digital converters, 1us conversion time (up to 16 Input channels) 15. DMA 16. 37 fast 1/o terminals, all 1/o terminals can be mapped to 16 External interrupts, almost all ports can tolerate 5V signals 17. 3 Universal Timers, 1 Timer 18. 2 (SP11, SP2) 19. 2 (12C1, 12C2) 20. 3 (USART1, USART2, USART3) 21. 1 (USB2.0 full speed) 22. 1 (2.0 B active) Package included: 2 pcs STM32F103C8T6 ARM STM32 Minimum System Development Board Module

In view of the problem that the SEM32RTC cannot oscillate, our door adopts the officially recommended low-load RTC crystal oscillator scheme and does not use cheap cylindrical crystal oscillator. The use of SWD debugging interface, the interface requires less than 3 interfaces to complete the task of debugging and downloading, compared with the traditional JTAG debugging has a lot of benefits, here insert a sentence JTAG now has a trend to be eliminated, for example, ST's new MO series MCU only retains the SWD interface, JTAG directly cancels the many benefits of SwD relative to JTAG. Excellent double-row pins, to ensure excellent conductive contact, 20 on both sides of double-row pins, and the double-row spacing is standard 600Mis to facilitate users to design the core board to the standard board or breadboard, and the delivery pin is not welded by default, which is convenient for customers to weld according to their needs. with its own voltage regulator chip, convenient for level conversion 5V can be accessed by the Mirco USB interface or marked by the header 5V access, if you have the conditions to provide 3.3V level (the working voltage required by the core can also be directly connected to the pin marked as 3.3, provide power for the core board, pay attention to the prohibition of multiple power inputs, in order to prevent short-circuit faults. The use of the MroUSB interface for power supply (the kind used in smartphones today) facilitates the development of USB devices by conveniently connecting USB to the corresponding circuit.