STM32F401 / STM32F411 Black Pill Development Board — ARM Cortex-M4
The Black Pill runs a Cortex-M4 with FPU — either the STM32F401CCU6 (84MHz, 256KB flash) or STM32F411CEU6 (100MHz, 512KB flash) depending on variant — on a board form-compatible with the Blue Pill but with USB-C and 25MHz crystal for reliable USB operation. The Cortex-M4 adds hardware floating-point and DSP instructions absent from the Blue Pill's Cortex-M3, making it suited for audio DSP, motor control, and signal processing tasks that stress the M3.
- Cortex-M4 with FPU — hardware floating-point at 84MHz (F401) or 100MHz (F411)
- F401: 256KB flash, 64KB SRAM / F411: 512KB flash, 128KB SRAM
- USB-C connector — USB Full Speed 12Mbps
- 25MHz crystal — reliable USB enumeration
- SWD header — ST-Link V2 debug
- BOOT0 button — easier DFU entry than jumper
| Specification | F401 variant | F411 variant |
|---|---|---|
| MCU | STM32F401CCU6 | STM32F411CEU6 |
| Clock | 84MHz | 100MHz |
| Flash | 256KB | 512KB |
| SRAM | 64KB | 128KB |
Is the Black Pill compatible with Blue Pill libraries?
Mostly yes. The STM32duino board support covers both F401 and F411 via the generic STM32F4xx target. Libraries that use hardware-specific STM32F1 registers need porting; libraries using STM32duino's standard Arduino API work directly. The F4xx pin mapping differs from the F1xx — check your pin assignments when migrating a Blue Pill project.
Best for
Audio DSP and FFT processing, motor FOC control, USB HID and MIDI devices, floating-point sensor fusion, MicroPython (using the STM32 port), and any project that has outgrown the Blue Pill's Cortex-M3.
Why Kunkune
Shipped from UK stock. 60-day returns, no minimum order. Fast Royal Mail delivery.
Program and debug the Black Pill using an ST-Link V2 programmer connected to the SWD header — required for debugging with breakpoints.
Buying in bulk? For orders of 10+ units, contact us for trade pricing.
