Item specifics
Description
The STM32F411CCU6 is a Cortex-M4 dynamic efficiency MCU from STMicroelectronics in an UFQFPN-48 package (7×7 mm). It runs at 100 MHz with FPU and ART Accelerator. It integrates 256 KB Flash, 128 KB SRAM, USB 2.0 OTG (FS), SDIO, 5 SPIs, 3 USARTs, 3 I2Cs, BAM batch acquisition mode, up to 11 timers (incl. 1 motor control PWM/deadtime), and a 12-bit ADC (10ch, 2.4MSPS). 36 I/Os, all 5 V-tolerant. Supply 1.7–3.6 V, -40–85 °C. Compared to the STM32F401CCU6 (84 MHz, 256 KB Flash, 64 KB SRAM), this model increases the core frequency to 100 MHz, doubles SRAM to 128 KB, adds more SPI interfaces (5 total), and introduces BAM batch acquisition mode, making it an even stronger upgrade option for the "Black Pill" ecosystem. Compared to the STM32F103C8T6 (Cortex-M3, 72 MHz), it upgrades to a Cortex-M4 core with FPU, offers higher frequency, larger memory, and adds USB OTG and SDIO, delivering exceptional value.
Core: Arm Cortex-M4 100 MHz + FPU + ART Accelerator Memory: 256 KB Flash, 128 KB SRAM USB 2.0 OTG: FS, supports Device/Host/OTG SDIO: SD/MMC card interface support BAM: Batch Acquisition Mode for low-power batch sensor data reading 12-bit ADC: 10 channels, 2.4 MSPS (up to 7.2 MSPS interleaved) Timers: 1× motor control PWM (deadtime/emergency stop), 6× 16-bit GP (incl. 2 quadrature encoders), 2× watchdogs, SysTick Communication Interfaces: 3×USART (ISO7816/LIN/IrDA), 5×SPI/I2S, 3×I2C (SMBus), USB OTG, SDIO I/Os: 36, all 5 V-tolerant Low Power: Sleep/Stop/Standby, VBAT backup RTC, BAM mode Package: UFQFPN-48 (7×7×0.55 mm)
Industrial: Sensor transmitters, data acquisition nodes Motor Control: BLDC/PMSM FOC, fans, pumps Consumer: Game controllers, remote controls, drone flight controllers IoT Nodes USB OTG/SDIO Storage Applications High-Performance Upgrades from Legacy 8/16-bit MCUs
Cortex-M4 + FPU + ART Accelerator: 100 MHz high performance with DSP and floating-point support 128 KB SRAM + 256 KB Flash: Doubled SRAM over the F401 series for large data buffering BAM Batch Acquisition Mode: Low-power batch sensor data reading, optimized battery life USB OTG + SDIO: USB communication and SD card storage UFQFPN-48 Ultra-Compact Package: 7×7 mm, 36 I/Os, ideal for space-constrained designs 12-bit ADC 2.4 MSPS Fast Conversion Mature STM32 Ecosystem: CubeIDE/CubeMX/HAL/LL, rich development board support (e.g., Black Pill)
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FAQ:
What is the STM32F411CCU6 and how does it differ from the STM32F411CEU6?
The STM32F411CCU6 is a 100 MHz Arm Cortex‑M4F microcontroller with 256 KB Flash and 128 KB SRAM in a UFQFPN‑48 package. It is the 256 KB Flash variant of the STM32F411 line, while the CEU6 offers 512 KB. All other features—CPU speed, SRAM, USB FS OTG with integrated PHY, 5× SPI, 3× I2C, 3× USART, DSP, and FPU—are identical. Choose the CCU6 when 256 KB of code storage is enough and you want the most cost‑effective entry into the F411 series without sacrificing any I/O or peripheral.
Is 256 KB of Flash enough for a real‑time OS and USB device stack? What applications fit?
Absolutely. Many production‑proven designs—USB sensors, compact motor controllers, portable data loggers, and wearable devices—fit comfortably in 256 KB. A lightweight RTOS, a USB device or host stack, and application logic typically occupy 120–180 KB, leaving room for additional features. If your code base grows later, the pin‑compatible CEU6 (512 KB) provides a direct upgrade path with no hardware changes.
How does the STM32F411CCU6 compare with the older STM32F401CCU6? Is it worth upgrading?
Both share the same UFQFPN‑48 package and 256 KB Flash, but the F411CCU6 delivers a higher CPU clock (100 MHz vs 84 MHz), two extra SPI interfaces (5 vs 3), lower Stop‑mode current, and a slightly more efficient pipeline. The pin‑out is compatible, so you can drop an F411CCU6 into an existing F401 design and immediately gain about 20% more processing power and better power efficiency without any PCB changes.
Does the STM32F411CCU6 support USB high‑speed, or only full‑speed? Can I build a USB audio device?
The F411 family supports only full‑speed USB (12 Mbps) through its integrated PHY; there is no ULPI high‑speed interface. Full‑speed is perfectly adequate for USB audio (isochronous transfers), virtual COM ports, HID keyboards, and mass‑storage devices. The 256 KB Flash and 128 KB SRAM can comfortably host a USB stack and audio processing routines in a tiny form factor.
How low can the power consumption go on the STM32F411CCU6, and what low‑power modes are available?
It supports Sleep, Stop, and Standby modes. In Stop mode with the main regulator off and all 128 KB SRAM retained, typical current is about 100 µA. A separate VBAT domain keeps the RTC and backup registers alive with just a few hundred nanoamps. Wake‑up from Stop is fast enough to respond to USB activity or external interrupts, making it ideal for battery‑powered IoT nodes and portable instruments.
Can the STM32F411CCU6 handle digital signal processing or motor control tasks?
Yes. The Cortex‑M4F core with single‑precision FPU and DSP instructions (single‑cycle MAC, SIMD) excels at digital filters, FFTs, and PID control loops. The chip includes advanced‑control timers with complementary PWM outputs and dead‑time insertion, enabling single‑axis motor drives, digital power supplies, and sensorless FOC—all from a 48‑pin package.
How many serial peripherals can I use simultaneously on the STM32F411CCU6's 48‑pin package?
With up to 36 I/Os, you can typically configure USB, two SPI, two I2C, and two USART concurrently without pin conflicts. Careful pin‑mapping with STM32CubeMX is essential. Many designs successfully run USB, one SPI, one I2C, and two UARTs simultaneously on this tiny package.
Is the UFQFPN‑48 package easy to solder by hand? Is it prototyping‑friendly?
Yes, the UFQFPN‑48 has exposed side pads with a 0.5 mm pitch, which can be drag‑soldered with a fine‑tip iron and flux. It is far easier to hand‑solder and inspect than BGA or QFN packages with a hidden thermal pad. Many hobbyists and small‑batch manufacturers use it successfully with a hot plate or hot‑air station.
Can I expand the memory externally on the STM32F411CCU6? What if I need more code space?
The F411 has no flexible memory controller (FMC) for parallel NOR/SDRAM, but you can connect external serial SPI Flash or PSRAM through the SPI ports. For larger code storage, the pin‑compatible CEU6 (512 KB) is the simplest upgrade. The internal 256 KB Flash is usually sufficient for dedicated applications; SPI RAM can be added for data logging.
What development tools and prototyping boards work with the STM32F411CCU6?
All major IDEs—free STM32CubeIDE, Keil MDK, and IAR EWARM—fully support the chip. No Nucleo board uses the exact UFQFPN‑48 package, but the NUCLEO‑F411RE (64‑pin) is fully software‑compatible and can be used for initial firmware development. Simply adjust the linker script and pin‑out in CubeMX when moving to the CCU6. Many third‑party tiny breakout boards are available to speed up prototyping.