STM32F401CCU6 Black Pill Overview
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The STM32F401CCU6 Black Pill is a compact and affordable development board designed for hobbyists, students, and professionals. It features the STM32F401CCU6 microcontroller, which is based on the ARM Cortex-M4 core with a maximum clock speed of 84 MHz. This board is widely used for prototyping and embedded applications due to its rich feature set and compatibility with various development environments.
Key Specifications
Microcontroller: STM32F401CCU6 (ARM Cortex-M4, 32-bit RISC core with FPU).
Clock Speed: Up to 84 MHz.
Memory: 256 KB Flash, 64 KB SRAM.
GPIO: Up to 81 I/O pins, all 5V tolerant.
Timers: 11 (6x 16-bit, 2x 32-bit, 2 watchdog timers, 1 SysTick timer).
Communication Interfaces: 3x USART/UART. 3x I2C. 3x SPI/I2S. 1x SDIO. USB 2.0 Full-Speed with on-chip PHY.
ADC: 12-bit, 16 channels, 2.4 MSPS.
Power Supply: Operates on 3.3V or 5V, with USB or external power options.
Operating Temperature: -40°C to +125°C.
Board Features
Compact Design: Dimensions of 20.78mm x 52.81mm, suitable for breadboard mounting.
Power Options: Can be powered via USB, 3.3V, or 5V pins.
User LED: Connected to PC13, active low.
Buttons: Reset and BOOT0 for programming and debugging.
USB-C Connector: Supports USB communication and power supply.
SWD Header: For programming and debugging using ST-Link or similar tools.
Programming and Development
The STM32F401CCU6 Black Pill is compatible with various development platforms, including:
Arduino IDE: Using STM32duino for easy integration.
Mbed OS: Supports both RTOS and bare-metal profiles for lightweight applications.
STM32CubeIDE: Official IDE for STM32 development with HAL/LL libraries.
PlatformIO: A versatile environment for embedded development.
Example: Blinking the Onboard LED
Here’s a simple example using the Arduino IDE to blink the onboard LED:
#define LED_PIN PC13 // Onboard LED pin
 
void setup() {
pinMode(LED_PIN, OUTPUT); // Set LED pin as output
}
 
void loop() {
digitalWrite(LED_PIN, HIGH); // Turn LED off (active low)
delay(500); // Wait 500ms
digitalWrite(LED_PIN, LOW); // Turn LED on
delay(500); // Wait 500ms
}
Important Considerations
Power Safety: Avoid powering the board simultaneously via USB and an external power source to prevent damage.
External Flash: The board includes a footprint for adding external SPI Flash for extended storage.
Debugging: Use an ST-Link programmer or USB bootloader for flashing firmware.
The STM32F401CCU6 Black Pill is a versatile and cost-effective choice for embedded projects, offering a balance of performance, features, and ease of use.