STMicroelectronics STM32F051R6T7TR

Overview

STM32F051R6T7TR from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller in LQFP64 package, operating up to 48 MHz with 32 KB Flash, 8 KB SRAM (HW parity), and integrated peripherals including one 12-bit ADC (1.0 µs conversion), one 12-bit DAC, two analog comparators, 11 timers (including advanced-control TIM1 with deadtime and emergency stop), RTC with alarm, two I²C (one Fast Mode Plus), two USART (one with ISO7816/LIN/IrDA), two SPI (18 Mbit/s), HDMI CEC, and capacitive touch sensing - deployed in industrial motor control interfaces and smart sensor nodes.

For engineers reviewing the STM32F051R6T7TR datasheet, STM32F051R6T7TR pinout, STM32F051R6T7TR application, or STM32F051R6T7TR equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 36 pins), low-power mode timing (Stop/Standby wakeup), analog peripheral precision (ADC/DAC linearity, comparator offset), and debug interface (SWD-only, no JTAG).

Technical Context

The device implements a single-cycle ARM Cortex-M0 core with Thumb-2 instruction set, tightly coupled NVIC supporting 32 interrupts and 4 priority levels, and a unified memory map with bit-band aliasing for atomic peripheral register access. Its clock system integrates dual oscillators (4–32 MHz HSE + 32 kHz LSE), internal RC sources (8 MHz HSI, 40 kHz LSI), and a PLL for CPU clock derivation.

Power architecture includes independent VDD/VDDA domains (2.0–3.6 V), programmable voltage detector (PVD) with 4 threshold levels, and three low-power modes (Sleep, Stop, Standby) with selective peripheral retention - enabling sub-µA standby current with RTC and backup registers active via VBAT.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK®2 construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051R6T7TR uniquely combines 32 KB Flash, full analog subsystem (ADC/DAC/comparators), capacitive touch, and calibrated RTC - making it the only option among the three for self-contained sensor fusion and human interface applications requiring sub-µA standby operation.

Availability

STM32F051R6T7TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, POS terminal interfaces, and home appliance UIs requiring stable component supply across extended product lifecycles.

Supply support for STM32F051R6T7TR 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, designing and manufacturing microcontrollers, power ICs, sensors, and automotive chips with emphasis on energy efficiency and industrial reliability.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring ARM Cortex-M0 performance, analog integration, and ultra-low-power operation - optimized for appliance control, industrial I/O modules, and IoT edge nodes.

FAQ

What is the maximum operating frequency and supported voltage range?

The STM32F051R6T7TR operates at up to 48 MHz with a supply voltage range of 2.0 V to 3.6 V for both digital (VDD) and analog (VDDA) domains. The analog supply must be ≥ VDD and ≤ 3.6 V. Internal regulators derive core voltage from VDD, enabling stable operation across the full voltage range without external LDOs.

Does this MCU support in-circuit debugging and programming?

Yes - it features Serial Wire Debug (SWD) interface using SWDIO and SWCLK pins, supporting full read/write memory access, breakpoint setting, and real-time variable monitoring via standard tools like ST-LINK/V2. No JTAG support is provided; SWD is the sole debug interface.

How many I/O pins are 5 V tolerant, and what is their absolute maximum rating?

Up to 36 I/O pins are 5 V tolerant (as specified in Table 14 of the datasheet), meaning they accept input voltages up to 5.5 V regardless of VDD level. Absolute maximum rating for these pins is –0.3 V to 5.5 V, allowing safe interfacing with 5 V peripherals without external level-shifting components.

What are the low-power mode current specifications and wakeup sources?

In Stop mode with RTC and backup registers active, typical current is 0.4 µA (VDD = 3.3 V, T = 25°C). Wakeup sources include EXTI lines (all GPIO), RTC alarm, I²C address match, and USART start-bit detection. Standby mode draws 0.25 µA with only VBAT-supplied RTC and backup registers retained.