STM32F103C8T6 development board system board integration ST-LINK V2 simulation recorder TTL serial port download

G: GND

B0: BOOTO

B1: BOOT1

3.3: 3.3V

①) Use the downloader to connect to MCU: Booto and Boot1 short -connect GND. At this time, the downloader can directly connect to the MCU and use the Stlink upper machine or KEIL software to record the MCU.

②) Use TTL modules alone: ​​Booto and Boot1 short 3.3. At this time, the downloader will be disconnected from the MCU. It can be used as a TTL module separately. The TX and RX wire printed feet on the board are used as TTL pins.

③ Use the STLINK downloader alone: ​​Booto and Boot1 short 3.3, SCK and DIO wire printing feet on the board can be connected to other MCUs to burn the program for other MCUs.

The keys of PA15, PB3, PB4, and PB5 are all the USB peripherals connecting the MCU's USB peripherals on the left Typec on the left.

GND, DIO, and SCK on the back of the board to download interfaces reserved by the downloader MCU.

G:GND

B0: BOOTO

B1: BOOT1

3.3: 3.3V

5V: 5V

SCK: Download the clock line (directly connected the upper end MCU)

DIO: Download the data cable (direct connection upper -end MCU) main control MCU direct connecting the lower -end STLINK downloader. SCK and DI0 pins are reserved, which is convenient for MCU to use other downloaders.

There are three major functions: the downloader of the upper -end main control, the main control serial port transfers to USB. It is used as a serial port to be used as a Stlink downloader alone,