STMicroelectronics STM32F051R8T6

Overview

STM32F051R8T6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 64 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, integrated 12-bit ADC and DAC, and dual USART/I²C/SPI interfaces - deployed in industrial motor control, smart sensor nodes, and low-power HMI systems.

For engineers reviewing the STM32F051R8T6 datasheet, STM32F051R8T6 pinout, STM32F051R8T6 application, or STM32F051R8T6 equivalent, key selection criteria include 55 fast I/Os (36 with 5 V tolerance), 11 timers including advanced-control TIM1 with deadtime generation, RTC with alarm/wakeup, and SWD debug support for embedded firmware development.

Technical Context

The device implements an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and NVIC with 32 interrupt lines. It integrates a programmable voltage detector (PVD), hardware CRC unit, and memory protection unit (MPU) for system integrity.

Clock management includes dual oscillators: 4–32 MHz external crystal and 32 kHz LSE for RTC, plus internal 8 MHz RC (±1% over temperature) with x6 PLL for precise 48 MHz system clock - enabling deterministic real-time response in time-critical peripherals like TIM1 PWM and CEC.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant ECOPACK®2, rated for industrial temperature range (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F051R8T6, STM32F072RBT6 adds USB but removes CEC and TSC - better for host-peripheral bridges; STM32G031K8T6 trades analog peripherals for AES-128 and secure boot - optimized for authenticated firmware updates over constrained networks.

Availability

STM32F051R8T6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and human-machine interface applications requiring stable component supply across multi-year production cycles.

Supply support for STM32F051R8T6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding high integration, low power, and industrial-grade reliability - with emphasis on motor control, sensing, and HMI.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32F051R8T6 operates at up to 48 MHz using its internal PLL, with digital supply (VDD) ranging from 2.0 V to 3.6 V and analog supply (VDDA) from 2.4 V to 3.6 V. The internal 8 MHz RC oscillator has ±1% accuracy over temperature, and the PLL maintains stable 48 MHz output across the full voltage and temperature range.

Does this MCU support hardware-based capacitive touch sensing?

Yes - it integrates a dedicated Touch Sensing Controller (TSC) supporting up to 18 capacitive sensing channels for touchkey, linear, and rotary sensors. No external components are required; electrode connections map directly to designated GPIOs (e.g., PA0–PA7, PB0–PB1, PC0–PC7), and the TSC handles charge-transfer measurement and noise filtering in hardware.

What debug interface does the STM32F051R8T6 use?

The device uses Serial Wire Debug (SWD) with two pins: SWDIO (bidirectional data) and SWCLK (clock). It does not support JTAG. SWD enables full programming, debugging, and real-time variable monitoring via standard tools like ST-LINK/V2, and occupies minimal PCB area compared to JTAG.

Is there a hardware CEC interface, and what is its low-power behavior?

Yes - the MCU includes a dedicated HDMI CEC peripheral with hardware header detection. In Stop mode, it draws less than 1 µA while continuously monitoring the CEC line; upon receiving a valid CEC header, it triggers a system wakeup event without CPU intervention - meeting stringent ErP Lot 6 standby power requirements.