STM32F051C8U7
STM32F051C8U7 - 48MHz Cortex-M0 MCU 64KB Flash | STMicroelectronics
The STMicroelectronics STM32F051C8U7 is a 32-bit ARM Cortex-M0 mainstream microcontroller from the STM32F0 Access Line, delivering 48 MHz CPU performance with 64 KB of embedded Flash and 8 KB of SRAM in a 48-pin UFQFPN (7x7 mm) package. It integrates a high-speed embedded memory subsystem, an 8-channel 12-bit ADC (1 µs), up to 11 timers including a 16-bit advanced-control PWM timer for motor control, two I²C, two SPI (one I²S), one HDMI CEC, one USB 2.0 FS device, and one CAN 2.0B interface, plus a 5-channel DMA controller and a 4% internal 8 MHz RC oscillator. Operating from 2.0 V to 3.6 V, it is designed for cost-sensitive 8-bit and 16-bit MCU replacement and ultra-low-power applications.
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (Flash), working memory (SRAM), and configurable peripherals such as ADCs, timers, and communication interfaces. Within the embedded electronics hierarchy, MCUs sit between discrete microprocessors and application-specific standard products (ASSPs); the ARM Cortex-M family spans Cortex-M0/M0+ (smallest, lowest power) up to Cortex-M7 (highest performance). The STM32F0 family specifically targets 8/16-bit replacement, offering 32-bit performance at comparable prices and code density.
Key features of the STM32F051C8U7 include: 64 KB Flash / 8 KB SRAM, 1 × 12-bit ADC (1 µs, up to 16 channels), one 16-bit advanced-control timer for motor control, two USART, two I²C (SMBus/PMBus), two SPI (one multiplexed with I²S), HDMI CEC, USB 2.0 FS device, CAN 2.0B, and a 5-channel DMA. The device is offered in LQFP48, UFQFPN48, and WLCSP36 packages; the U7 suffix denotes the UFQFPN48 7×7 mm option. The industrial-grade temperature range is −40 °C to +105 °C.
The architecture is a Cortex-M0 core with single-cycle I/O access via a multi-AHB bus matrix, a 4-channel DMA controller, and a low-voltage 1.2 V internal regulator. The 12-bit ADC samples at 1 MSPS with configurable channel-scan and hardware oversampling; the advanced-control timer supports complementary PWM outputs with programmable dead-time, making it ideal for 3-phase motor control. The integrated USB 2.0 FS device and CAN 2.0B peripheral remove the need for external transceivers in many designs.
Typical applications include low-cost motor drives (BLDC, PMSM, brushed DC), home appliances and small white goods, USB peripherals and human-interface devices, HVAC controllers, sensor hubs, lighting controls, and 8/16-bit MCU replacement. The combination of CAN, USB, and a 16-bit motor-control timer in a single die makes the STM32F051C8U7 a strong fit for automotive body and chassis modules (non-safety-rated), as well as industrial PLCs and field sensors.
When designing with this device, note that the 48-pin UFQFPN package leaves a tighter analog pin budget than the 64-pin LQFP variant - plan your GPIO and peripheral mapping early. The internal 8 MHz RC oscillator is trimmed to ±1% over temperature, but USB and CAN require the external 12 MHz HSE crystal for jitter compliance.
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