STMicroelectronics STM32F058C8U6

Overview

STM32F058C8U6 from STMicroelectronics is an ARM® Cortex®-M0 32-bit microcontroller with 64 KB Flash, 8 KB SRAM, 12-bit ADC and DAC, and integrated capacitive touch sensing-designed for cost-sensitive industrial control and human-interface applications operating at 1.8 V supply. It integrates two I²C (one Fast Mode Plus), two USARTs (one with ISO7816/LIN/IrDA), two SPIs (18 Mbit/s), HDMI CEC, RTC with alarm, and up to 17 touch channels.

For engineers reviewing the STM32F058C8U6 datasheet, STM32F058C8U6 pinout, STM32F058C8U6 application, or STM32F058C8U6 equivalent, key selection considerations include its 1.8 V core voltage tolerance, 5 V-tolerant I/O capability on up to 35 pins, embedded touch-sensing controller, dual fast analog comparators, and UFBGA64 5×5 mm package with 48 I/Os.

Technical Context

The STM32F058C8U6 implements a single-cycle ARM Cortex-M0 core running at up to 48 MHz, supported by an integrated 8 MHz RC oscillator with PLL multiplication and external 4–32 MHz crystal options. Its clock tree includes dedicated 32 kHz LSE for RTC calibration and independent 40 kHz LSI for watchdog timing.

Memory subsystem comprises 64 KB of Flash with error correction, 8 KB SRAM with hardware parity checking, and CRC calculation unit. Analog subsystem features one 12-bit 1.0 µs ADC (0–3.6 V range, 16-channel), one 12-bit DAC channel, two programmable analog comparators, and a dedicated Touch Sensing Controller (TSC) supporting up to 17 capacitive sensing channels.

Key Specifications

Pinout & Package

STM32F058C8U6 is housed in a 64-ball Ultra Fine Pitch Ball Grid Array (UFBGA64) package measuring 5×5 mm with 0.5 mm ball pitch. This package supports 48 general-purpose I/Os, including 35 with 5 V tolerance, and integrates dedicated pins for USB-less debug (SWD), RTC battery backup (VBAT), and capacitive touch sensing (TSC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F058C8U6, STM32F072CBT6 trades touch capability for USB device support and higher SRAM, while STM32F042K6T6 offers cost and size reduction at the expense of memory, I/O, and analog feature set - making the F058 optimal for touch-enabled, low-voltage industrial edge nodes.

Availability

STM32F058C8U6 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, USB-free diagnostic tools, and low-power sensor nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32F058C8U6 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, delivering silicon solutions for automotive, industrial, power, and IoT markets since 1987.

The STM32F0 series targets cost-sensitive, low-power embedded applications requiring ARM Cortex-M0 performance with rich analog and human-interface peripherals - optimized for industrial control, appliance, and smart sensor endpoints.

FAQ

What is the maximum operating frequency and core type of the STM32F058C8U6?

The STM32F058C8U6 features an ARM Cortex-M0 32-bit RISC core with a maximum CPU frequency of 48 MHz. It achieves this speed using either the internal 8 MHz RC oscillator with x6 PLL multiplication or an external 4–32 MHz crystal. The core operates at 1.8 V ±8%, enabling efficient execution of real-time control algorithms while maintaining low dynamic power consumption.

Does the STM32F058C8U6 support 5 V-tolerant I/Os, and how many are available?

Yes, the STM32F058C8U6 supports 5 V-tolerant I/Os on up to 35 pins across GPIO ports A, B, and C. This capability allows direct interfacing with legacy 5 V logic and peripherals without external level shifters. Tolerance is specified under all operating conditions per ST's electrical characteristics table (Section 6.3.13), and applies only to input mode - outputs remain 1.8 V logic levels.

What touch sensing capabilities does the STM32F058C8U6 provide, and how are they implemented?

The STM32F058C8U6 integrates a dedicated Touch Sensing Controller (TSC) supporting up to 17 capacitive sensing channels. It implements both self-capacitance (for touchkeys) and mutual-capacitance (for linear/rotary sliders) measurement using charge-transfer acquisition. All TSC functions operate autonomously with DMA offload, minimizing CPU load. Pin assignments are fixed per package - for UFBGA64, TSC signals map to PA0–PA7, PB0–PB1, and PC0–PC7 as defined in Table 4 and Figure 3 of the datasheet.

Is the STM32F058C8U6 pin-compatible with other STM32F058 variants, and what package options exist?

The STM32F058C8U6 shares identical pinout and signal mapping with other STM32F058x8 variants in the UFBGA64 package (e.g., STM32F058R8T6 in LQFP64 differs in pin count and layout). UFBGA64 is the only package offered for the 'C8' suffix, distinguishing it from 'R8' (LQFP64) and 'T8' (UFQFPN48). All variants share the same peripheral set and register map, enabling software reuse across packages where pin constraints allow.