1PCS STM32 Minimum STM32F103C8T6 ARM System Development Board Module for Arduino

This is a core chip based on the STM32F103C8T6 arm core board. The features are as follows:
1. The board is based on the most basic MCU circuit, 8M crystal oscillator circuit and 32768, USB power supply circuit.
2. The core board is divided into two lines leading to all I/O ports.
3. With SWD simulation debugging download interface, it is simple, convenient and quick to debug.
4. Using Mirco USB interface, you can do USB communication and power supply. The USB interface is compatible with ordinary Android mobile phone charger interface.
6. Epson brand RTC crystal oscillator, easy to start and more stable.
7. There are multiple pins, but the pins are not welded by default. Users can choose their own welding direction according to their own application scenarios. If welding is required, please inform the owner.
It can be compiled with Keil, compiled with IAR, and the program can be downloaded through J-Link or USART1. The program is the owner and debugger. If you have any questions, you can consult the owner.

Chip description:
1. STM32F103C8T6
Package type: LQFP;
Number of pins: 48;
Core: Cortex-M3;
Working frequency: 72MHz;
Storage source: 64K Byte Flash, 20KByte SRAM;
Interface source: 2x SPI, 3x USART, 2x I2C, 1x CAN, 37x I/O port,
Analog-to-digital conversion: 2x ADC (12 bits/16 channels)
Timer: 3 general-purpose timers and 1 advanced timer
Download debugging: support JTAG/SWD debugging interface download, support IAP.
2. RT9193: 3.3V voltage regulator chip, the maximum output is 300mA.

Interface Description:
1. SWD interface: support simulation, download and debugging.
2. Mirco USB interface: power supply and USB communication, download is not supported.
3. USART1 interface: USART1 can be used to download programs, or USART1 can be used for communication.
4. MCU pin interface: carry all I/O port pins for easy connection with the device.
5. 5V and 3.3V power input and output interface: often used for external power supply, or shared ground processing with other modules

Other equipment description:
1. Power indicator light (PWR): The status of the power indicator light can determine whether the power supply is stable.
2. User LED (PC13): It is convenient for I/O output test or display program running.
3. Start jump select programming method: (1, user flash memory 2, SRAM 3, system memory).
4. Reset button: reset the chip for the user program.
5. 8M crystal oscillator: The frequency can be set to lock the system at 72MHz.
6,32.768KHz crystal oscillator: can be used for built-in RTC, or for calibration.