STM32F103C8T6 datasheet, pinout & VS STM32F103C6T6

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STM32F103C8T6

The STM32F103C8T6 is a cost-effective 32-bit ARM Cortex-M3 microcontroller from STMicroelectronics, featuring a maximum clock speed of 72 MHz, 64KB Flash memory, and 20KB SRAM. It integrates extensive peripheral interfaces such as SPI, I²C, USART, ADC, and PWM. Thanks to its compact size, reliable performance, and mature development ecosystem, it’s widely used in industrial control systems, consumer electronics, smart home applications, and IoT devices, particularly favored by embedded system developers.

STM32F103C8T6 pinout

STM32F103C8T6 equivalent microcontroller

STM32F103C8T6 circuit wiring example

1. Main Controller

• Utilizes the STM32F103C8T6 MCU with ARM Cortex-M3 core.

• Clearly labeled pins show various functions, including power (VCC3V3), ground (GND), clock pins, GPIOs, and analog pins.

2. Power Supply Circuit

• The main power input passes through a voltage regulator chip (U1), outputting a stable 3.3V for MCU operation.

• Bypass capacitors C6 and C7 are used to stabilize and filter the power supply voltage.

3. Crystal Oscillator Circuit

• The main oscillator is an 8 MHz crystal (Y2) paired with load capacitors C9 and C10 (20 pF each), providing a stable clock signal.

• RTC (Real-Time Clock) uses a 32.768 kHz crystal (Y1) with load capacitors C3 and C4 for timing accuracy.

4. Reset Circuit

• The NRST pin is pulled up to VCC3V3 via a 10 kΩ resistor (R4) to enable automatic power-on reset.

5. BOOT Configuration Circuit

• The BOOT0 pin connects to a jumper header (Header X6) allowing the selection of boot mode:

  • Jumper position determines whether the MCU boots from internal Flash memory or system memory.

6. SWD Debugging Interface

• Provides SWD interface pins (SWCLK, SWDIO) for programming and debugging.

• Includes VCC and GND pins for easy connection to debugging tools like ST-Link.

STM32F103C8T6 uart spi i2c example

// Initialize UART (USART1)
UART_HandleTypeDef huart1;

void UART_Init(void) {
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
HAL_UART_Init(&huart1);
}

int main(void) {
HAL_Init();
UART_Init();

char msg[] = “Hello\r\n”;
while (1) {
HAL_UART_Transmit(&huart1, (uint8_t*)msg, sizeof(msg)-1, HAL_MAX_DELAY);
HAL_Delay(1000);
}
}

STM32F103C8T6 arduino compatibility

The STM32F103C8T6 is highly compatible with the Arduino development environment. Users can quickly start development by installing the STM32 Arduino core, such as the official STM32duino or the community-maintained Roger Clark STM32 core. This compatibility allows you to leverage the Arduino IDE and its extensive library ecosystem, while benefiting from the powerful performance and rich peripheral interfaces of the STM32 platform. It is commonly used in IoT, robotics, and automation applications.