STMicroelectronics STM32F051K6U7

Overview

STM32F051K6U7 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 32 KB Flash, 8 KB SRAM with hardware parity, 48 MHz max CPU frequency, one 12-bit ADC (16-channel, 1.0 µs conversion), one 12-bit DAC, two analog comparators, and integrated capacitive touch sensing for up to 18 channels - deployed in industrial sensor nodes and smart metering front-ends.

For engineers reviewing the STM32F051K6U7 datasheet, STM32F051K6U7 pinout, STM32F051K6U7 application, or STM32F051K6U7 equivalent, key selection criteria include its 32-pin UFQFPN footprint, 2.0–3.6 V supply range, 5 V-tolerant I/Os (up to 36), dual USARTs with LIN/IrDA support, and RTC with alarm and periodic wakeup from Stop/Standby modes.

Technical Context

The STM32F051K6U7 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), CRC calculation unit, and three independent clock sources: 4–32 MHz HSE, 32 kHz LSE for RTC, and internal 8 MHz HSI with PLL multiplier.

Its peripheral subsystem includes a 7-channel advanced-control timer (TIM1) with deadtime generation and emergency stop for motor control, plus six general-purpose timers (TIM2/3/14/15/16/17), one basic timer (TIM6) dedicated to DAC triggering, and HDMI CEC interface with header-based wakeup capability.

Key Specifications

Pinout & Package

STM32F051K6U7 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32 terminals, optimized for space-constrained industrial and consumer applications requiring high I/O density and thermal efficiency.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051K6U7 uniquely combines DAC, TSC, and advanced timer features in a 32-pin footprint - making it optimal for mixed-signal HMI and sensor-edge applications where analog precision and human interface coexist.

Availability

STM32F051K6U7 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter front-ends, home appliance control panels, and medical diagnostic handhelds requiring stable component supply across long-lifecycle deployments.

Supply support for STM32F051K6U7 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, specializing in microcontrollers, power management, MEMS, and automotive ICs with strong industrial and consumer market presence.

The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring high integration, low power, and robust analog peripherals - designed specifically for industrial controls, appliance HMI, and sensor edge nodes.

FAQ

What is the maximum operating frequency of the STM32F051K6U7?

The STM32F051K6U7 operates at a maximum CPU frequency of 48 MHz, achieved using the internal 8 MHz HSI oscillator with x6 PLL multiplication or an external 4–32 MHz crystal. This frequency is fully supported across the entire industrial temperature range (–40°C to +85°C) and 2.0–3.6 V supply voltage.

Does the STM32F051K6U7 support hardware-accelerated cryptography?

No, the STM32F051K6U7 does not include hardware cryptographic accelerators such as AES or SHA engines. It relies on software libraries for encryption tasks. For secure boot or data encryption, developers must implement lightweight algorithms (e.g., AES-128 in ECB/CBC mode) using its Cortex-M0 core and SRAM resources.

Can the STM32F051K6U7 drive a standard 16×2 character LCD directly?

Yes, the STM32F051K6U7 can drive a parallel 16×2 character LCD using GPIOs configured in 4-bit or 8-bit mode, leveraging its up to 36 5 V-tolerant I/Os. No external level shifters are needed for 5 V LCD modules, and its flexible alternate function mapping allows dedicated control line assignment (RS, RW, E) alongside data bus pins.

What debug interface does the STM32F051K6U7 use, and what tools are compatible?

The STM32F051K6U7 uses Serial Wire Debug (SWD) with SWDIO and SWCLK pins - a 2-pin ARM-standard interface supporting full debugging, flash programming, and real-time tracing. Compatible tools include ST-LINK/V2, ST-LINK/V3, and third-party debuggers (e.g., Segger J-Link, Black Magic Probe) with SWD protocol support.