STMicroelectronics STM32C031K6T6

Overview

STM32C031K6T6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 32 KB flash, 12 KB SRAM, 48 MHz max CPU frequency, 2× USART, and 12-bit ADC (0.4 µs conversion). It operates from 2.0–3.6 V across –40°C to 125°C and supports low-power Stop/Standby modes-used in industrial sensor nodes requiring compact, robust, and cost-efficient control with analog sensing and serial communication.

For engineers reviewing the STM32C031K6T6 datasheet, STM32C031K6T6 pinout, STM32C031K6T6 application, or STM32C031K6T6 equivalent, key selection criteria include its LQFP32 package, 5 V-tolerant I/Os, integrated CRC unit, hardware parity on SRAM, and dual oscillator support (4–48 MHz HSE + 32 kHz LSE) for time-critical embedded timing and firmware integrity.

Technical Context

The STM32C031K6T6 integrates an Arm Cortex-M0+ core with MPU, enabling memory protection for real-time task isolation. Its clock system combines a 48 MHz internal RC oscillator (±1 %) and external crystal options, supporting precise timing for UART-based protocols and RTC calendar functions.

Peripheral interconnect uses a dedicated AHB/APB matrix, allowing concurrent DMA transfers (3-channel controller), simultaneous ADC sampling (up to 19 channels), and timer-triggered communications-critical for deterministic motor control feedback loops and sensor fusion in resource-constrained edge devices.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant and ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32C011F4U6, the STM32C031K6T6 delivers 2× flash, full RTC, and 45 I/Os-making it superior for time-stamped sensor logging. Against STM32G031F8P6, it trades USB for lower cost and simpler qualification, ideal for cost-sensitive industrial OEMs avoiding USB certification overhead.

Availability

STM32C031K6T6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, motor control actuators, and IoT edge gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32C031K6T6 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 ICs, MEMS, and automotive-grade components since 1987.

The STM32C0 series targets cost-sensitive, high-volume embedded applications demanding robustness, low power, and simplified qualification-especially in industrial automation, appliance control, and metering where longevity and supply stability are critical.

FAQ

What is the maximum operating frequency of the STM32C031K6T6?

The STM32C031K6T6 runs at up to 48 MHz using its internal 48 MHz RC oscillator (HSI48) trimmed to ±1 % accuracy, or from an external 4–48 MHz crystal. This frequency is fully supported across the entire –40°C to 125°C temperature range and 2.0–3.6 V supply, enabling deterministic real-time performance without external PLL complexity.

Does the STM32C031K6T6 support hardware encryption or secure boot?

No, the STM32C031K6T6 does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It offers readout protection (RDP) Level 1 and memory protection unit (MPU) for basic firmware confidentiality and task isolation, but lacks TrustZone or dedicated secure key storage required for certified secure boot implementations.

Can the STM32C031K6T6 drive standard 5 V logic inputs directly?

Yes, all 45 GPIO pins on the STM32C031K6T6 are 5 V-tolerant when configured as inputs-even with VDD = 2.0 V. This allows direct connection to 5 V TTL/CMOS outputs (e.g., RS-232 line drivers, legacy microcontrollers) without external level shifters, simplifying interface design and reducing bill-of-materials cost.

What debug interface does the STM32C031K6T6 provide?

The STM32C031K6T6 supports Serial Wire Debug (SWD) via SWCLK and SWDIO pins (PA14/PA13), compatible with ST-LINK/V2-1 and third-party JTAG/SWD debuggers. It does not support JTAG or SWO trace output, limiting real-time instruction tracing-but full breakpoint, register, and memory access is available for firmware development and field diagnostics.