💎MCU introduction:
⚡The highest working frequency of 72MHz, 1.25DMips/MHz when the memory's O waiting period is accessed.
⚡Single cycle multiplication and hardware division.
⚡64K flash program memory.
⚡20K byte SRAM.
⚡2.0-3.6 volt power supply and Iamp 0 pin.
⚡Power on / off reset (POR/PDR), programmable voltage monitor (PVD).
⚡4-16MHz crystal oscillator.
⚡Built-in RC oscillator with 8MHz adjusted by production.
⚡RC oscillator with calibrated 40KHz embedded.
⚡PLL that generates the CPU clock.
⚡32KHz RTC oscillator with calibration function.
⚡Sleep, downtime and standby mode.
⚡VBAT supplies power to the backup register of RTC.
⚡2 12-bit A / D converters, 1us conversion time (up to 16 input channels).
⚡ DMA.
⚡37 fast Iamp 0 ports, all of which can be mapped to 16 external interrupts; almost all ports can tolerate 5V signals.
⚡3 general timers, one advanced timer.
⚡2 (SPI1,SPI2).
⚡2 (I2C1 remark I2C2).
⚡3 (USART1,USART2,USART3).
⚡1 (USB 2.0 full speed).
⚡1 (2.0B active)

💎Product parameter
⚡【kernel】：ARM 32 Cortex-M3 CPU.
⚡【Operating frequency】: 72MHz.
⚡【Debugging mode】：SWD
⚡【Size】: 22.86mm × 53.34mm.

💎Packing list
⚡STM32F103C8T6 System Development Board*2