1. Decoupling Capacitors: These capacitors filter out noise from the power supply.
   • VDD pins (pins 24, 36, and 48):
     • Connect a 0.1 µF capacitor close to each VDD pin.
   • VDDA pin (pin 9):
     • Connect a 1 µF capacitor close to this pin additionally.
   • VBAT pin (pin 1) (if using):
     • Connect a 1 µF capacitor to GND.
2. Reset Circuit: To ensure reliable operation during reset conditions.
   • NRST pin (pin 7):
     • Connect a 10 kΩ pull-up resistor to VDD.
     • Include a 100 nF capacitor to GND (optional but recommended).
3. Boot Configuration: To select the boot mode.
   • BOOT0 pin (pin 44):
     • Connect a 10 kΩ pull-down resistor to GND.
4. Oscillator (if external clock is required):
   • High-speed external (HSE) oscillator:
     • Connect an 8 MHz to 25 MHz crystal between pins 5 (OSC_IN) and 6 (OSC_OUT).
     • Add two 22 pF loading capacitors to GND from these pins.
   • Low-speed external (LSE) oscillator for RTC (optional):
     • Connect a 32.768 kHz crystal between pins 3 (PC14) and 4 (PC15).
     • Add two 22 pF loading capacitors to GND from these pins.

• Decoupling capacitors:
  • Connect $\texttt{C1}$:1 to $\texttt{U1}$:24 (0.1 µF)
  • Connect $\texttt{C2}$:1 to $\texttt{U1}$:36 (0.1 µF)
  • Connect $\texttt{C3}$:1 to $\texttt{U1}$:48 (0.1 µF)
  • Connect $\texttt{C4}$:1 to $\texttt{U1}$:9 (1 µF)
  • (Optional) Connect $\texttt{C5}$:1 to $\texttt{U1}$:1 (VBAT, 1 µF)
• Reset Circuit:
  • Connect $\texttt{R1}$:1 to $\texttt{U1}$:7 (10 kΩ pull-up)
  • (Optional) Connect $\texttt{C6}$:1 to $\texttt{U1}$:7 (100 nF to GND)
• Boot Configuration:
  • Connect $\texttt{R2}$:1 to $\texttt{U1}$:44 (10 kΩ pull-down)
• Oscillator (if needed):
  • Connect $\texttt{XTAL1}$:1 to $\texttt{U1}$:5 (Crystal, 8-25 MHz)
  • Connect $\texttt{XTAL1}$:1 to $\texttt{U1}$:6 (22 pF)
  • Connect $\texttt{XTAL2}$:1 to GND (22 pF)

1. Power Supply: Ensure that the microcontroller is properly powered.
   • Connect U2:VBAT to a 3.3V power source.
   • Connect U2:VDD to a 3.3V power source.
   • Connect U2:VDDA to the 3.3V power source.
   • Connect U2:VSS and U2:VSSA to Ground (GND).
2. SWD Interface:
   • Connect U2:PA13 (SWDIO) to your programmer's SWDIO (Data Input/Output).
   • Connect U2:PA14 (SWCLK) to your programmer's SWCLK (Clock).
   • Connect U2:NRST to your programmer's NRST pin for resetting the microcontroller.
3. SWD Connections:
   • Connect SWDIO:P1 to U2:PA13.
   • Connect SWCLK:P1 to U2:PA14.
   • Optionally, connect RST:P1 to U2:NRST for reset functionality.

• ST-LINK Programmer: Official programmer/debugger from STMicroelectronics.
• J-Link by SEGGER: Widely used programmer/debugger.
• CMSIS-DAP: ARM standard for debugging interface.

• STM32CubeProgrammer: A tool by STMicroelectronics for programming STM32 MCUs.
• Keil uVision: Often used with ARM MCUs.
• OpenOCD: Open-source utility that supports numerous programmers.

1. Connect your programmer to your computer.
2. Open STM32CubeProgrammer.
3. Choose the correct SWD interface.
4. Load your firmware file (usually with a .bin or .hex extension).
5. Write the firmware to the microcontroller.

1. Open STM32CubeIDE and create a new STM32 project.
2. Generate initialization code using STM32CubeMX.
3. Write your custom application code.
4. Compile your project to create a .bin or .hex file.

C
// Example of a simple blink program
#include "main.h"

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

  __HAL_RCC_GPIOC_CLK_ENABLE();

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  GPIO_InitStruct.Pin = GPIO_PIN_13;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  while (1)
  {
    HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);
    HAL_Delay(1000); // Delay 1000 ms
  }
}

• Ensure correct power supply and ground connections.
• Properly connect the SWDIO, SWCLK, and optional NRST pins for programming.
• Use appropriate software tools to load the firmware.
• Follow any additional setup required for your specific programmer.