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STMicroelectronics STM32C031C6T6
- Part No.:
- STM32C031C6T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32C031C6T6.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,715
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Product details
Overview
STM32C031C6T6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller with 32 KB flash, 12 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC (0.4 µs conversion), and dual USARTs supporting LIN/IrDA/ISO7816 - deployed in industrial sensor nodes and smart metering front-ends requiring low-power operation and robust serial communication.
For engineers reviewing the STM32C031C6T6 datasheet, STM32C031C6T6 pinout, STM32C031C6T6 application, or STM32C031C6T6 equivalent, key selection criteria include operating voltage range (2.0–3.6 V), 45 5 V-tolerant I/Os, integrated CRC unit, hardware parity on SRAM, and support for Stop/Standby/Shutdown low-power modes with sub-µA retention current.
Technical Context
The STM32C031C6T6 integrates an Arm Cortex-M0+ core with Memory Protection Unit (MPU) for task isolation, a 48 MHz internal HSI48 oscillator (±1 %), and dual clock domains enabling independent peripheral clock gating. It supports boot from system memory, main flash, or SRAM via BOOT pins.
Its analog subsystem includes a 12-bit ADC with up to 19 external channels, internal temperature sensor, and VREFINT reference - all calibrated at factory and accessible via dedicated registers. The DMA controller features 3 channels with flexible peripheral request mapping to reduce CPU load during data transfers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz max - enables real-time deterministic control with <10 ns interrupt latency. |
| Flash / RAM | 32 KB flash with readout protection; 12 KB SRAM with hardware parity - ensures code integrity and runtime data reliability. |
| ADC | 12-bit, 0.4 µs conversion time, 19-channel input - supports high-speed sampling of multiple sensors without external mux. |
| I/O Count & Tolerance | Up to 45 fast I/Os, all 5 V-tolerant - simplifies interface to legacy 5 V peripherals without level shifters. |
| Low-Power Modes | Sleep, Stop, Standby, Shutdown - Stop mode draws ≤1.2 µA (typ.) with RTC + SRAM retention, critical for battery-powered endpoints. |
| Communication Interfaces | 2× USART (1 with ISO7816/LIN/IrDA), 1× I²C (Fast-mode Plus, 1 Mbit/s), 1× SPI (24 Mbit/s) - covers wired industrial protocols and secure card interfaces. |
| Clock Sources | 4–48 MHz HSE, 32 kHz LSE with calibration, HSI48 (±1 %), LSI (±5 %) - enables precise timing for RTC and jitter-sensitive comms without external crystals. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pin count and layout optimized for compact industrial PCBs with full GPIO remapping capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / Ground | Dual power domains: VDD powers digital core & I/Os; VSS provides return path - decoupling required per datasheet layout guidelines. |
| PA0–PA15, PB0–PB15, PC13–PC15, PD2 | General-purpose I/O | 45 total I/Os; all mappable to EXTI lines and support alternate functions including USART, SPI, I²C, timers - enables flexible board routing. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–5.5 V logic - compatible with external supervisory circuits or pushbutton debouncing networks. |
| BOOT0 | Boot mode selection | High at power-on selects system memory boot (for DFU); low selects main flash - used during firmware recovery or initial programming. |
| SWDIO / SWCLK | Serial Wire Debug interface | 2-pin debug port supporting full SWD protocol - enables non-intrusive debugging, flash programming, and real-time trace without JTAG overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CRC unit | Accelerates checksum calculation for firmware updates and data packet validation - reduces CPU cycles by >95% vs. software CRC. |
| Programmable BOR | Configurable brownout reset thresholds (2.0/2.2/2.4/2.7 V) - prevents erratic operation during brownout conditions in unregulated power supplies. |
| Calendar RTC with alarm | Real-time clock with calendar function, alarm interrupt, and backup domain - maintains time across Stop/Standby modes using VBAT or LSE. |
| 5 V-tolerant I/Os | All GPIOs withstand 5.5 V regardless of VDD - eliminates need for external level translators when interfacing with 5 V sensors or logic. |
| Internal voltage reference (VREFINT) | 1.21 V ±1.5% reference with factory calibration - enables accurate ADC measurements without external reference component. |
Applications
| Industrial Sensor Node | Smart Electricity Meter Front-End |
|---|---|
Use Scenario: Compact, battery-operated environmental sensor collecting temperature, humidity, and CO₂ data every 10 seconds. IC Role / Device Role / Timing Role: Main controller executing sensor polling, ADC acquisition, data filtering, and LoRaWAN packet assembly; RTC triggers periodic wake-up from Stop mode. Use Value: Sub-µA Stop mode current extends 10-year battery life; 5 V-tolerant I/Os directly interface with legacy analog sensors. |
Use Scenario: Metering module handling pulse counting, tariff switching, and secure communication with utility backend via PLC or RF. IC Role / Device Role / Timing Role: Real-time energy computation engine with ISO7816 UART for secure metrology IC interface and LIN bus for display panel control. Use Value: Dual USARTs enable concurrent secure metrology comms and human-interface control; hardware parity ensures SRAM data integrity during power glitches. |
| Home Appliance Motor Control | IoT Gateway Edge Processor |
Use Scenario: Fan or pump controller requiring PWM-driven BLDC commutation, overcurrent detection, and thermal monitoring. IC Role / Device Role / Timing Role: Dedicated motor control MCU managing TIM1 advanced timer outputs, ADC-based current sensing, and fault shutdown logic. Use Value: 16-bit advanced timer with dead-time insertion and complementary outputs enables precise gate drive; 0.4 µs ADC captures current peaks before protection tripping. |
Use Scenario: Low-cost edge node aggregating Zigbee/Z-Wave sensor data and forwarding to cloud via Wi-Fi or Ethernet bridge. IC Role / Device Role / Timing Role: Protocol translation hub running lightweight RTOS, managing UART-to-SPI bridging, and buffering packets in protected SRAM. Use Value: 32 KB flash accommodates dual-bank OTA update image; CRC unit validates firmware integrity before activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G031F8P6 | Same Cortex-M0+, but 64 KB flash, no RTC calendar, only 1 USART, no ISO7816 support | Better for cost-sensitive designs needing larger code space but no time-stamped logging or secure card interface | Select if flash headroom > RTC/calendar functionality; verify bootloader compatibility for field updates. |
| RP2040 | Dual-core Arm Cortex-M0+, 2 MB flash, no hardware parity, no BOR, 1.8–3.3 V supply | Requires external level shifters for 5 V peripherals; lacks analog features (no VREFINT, no calibrated temp sensor) | Choose only when multi-core processing or large storage outweighs analog integration and industrial-grade power robustness. |
Compared with STM32G031F8P6 and RP2040, the STM32C031C6T6 uniquely balances industrial-grade analog integration (calibrated ADC/VREFINT/RTC), 5 V-tolerant I/Os, and ultra-low-power Stop mode - making it optimal for battery-powered metering and sensor edge nodes where mixed-voltage interoperability and long-term reliability are non-negotiable.
Availability
STM32C031C6T6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart electricity meter front-ends, home appliance motor controllers, and IoT gateway edge processors requiring stable component supply across multi-year production cycles.
Supply support for STM32C031C6T6 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32C0 series targets cost-sensitive, high-volume industrial and appliance applications - delivering Cortex-M0+ performance with enhanced analog integration, robust I/O, and extended temperature support (−40°C to 125°C).
FAQ
What is the maximum operating temperature for the STM32C031C6T6?
The STM32C031C6T6 is qualified for operation from −40°C to 125°C ambient temperature, with full specification compliance across this range. This rating is confirmed in Section 5.3.1 of DS13867 Rev 4 and applies to all LQFP48 variants, enabling deployment in harsh industrial enclosures and automotive under-hood environments.
Does the STM32C031C6T6 support USB device functionality?
No, the STM32C031C6T6 does not include a USB peripheral. It offers USART, I²C, and SPI interfaces only. USB connectivity requires external PHY or migration to STM32G0 or C011-series parts with integrated USB 2.0 FS transceivers - confirmed by absence of USB-related registers and pins in the RM0495 reference manual.
Can the internal 48 MHz RC oscillator be used as the system clock source without calibration?
Yes, the HSI48 oscillator operates at 48 MHz with ±1 % accuracy across voltage and temperature - sufficient for most USART, SPI, and I²C communications without external crystal. Calibration is optional and only needed for applications demanding tighter timing, such as audio clock synchronization or precise PWM generation.
How many independent watchdog timers does the STM32C031C6T6 integrate?
The STM32C031C6T6 integrates two independent watchdogs: an Independent Watchdog (IWDG) driven by the 32 kHz LSI oscillator, and a System Window Watchdog (WWDG) clocked from APB1. Both support configurable timeout periods and early wakeup interrupts - detailed in Sections 3.15.3 and 3.15.4 of DS13867 Rev 4.
STM32C031C6T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32C0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 48MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
- Number of I/O:
- 45
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 12K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 21x12b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32C031C6T6 FAQ
1.How can I place an order for STM32C031C6T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32C031C6T6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32C031C6T6 reliable?
The price and inventory of STM32C031C6T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32C031C6T6 is usually 5 days.
3.What payment methods are accepted for STM32C031C6T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32C031C6T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32C031C6T6?
STM32C031C6T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32C031C6T6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32C031C6T6?
For technical support, including STM32C031C6T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32C031C6T6 requirements.
6.How does Aetrix verify that STM32C031C6T6 is sourced from the original manufacturer or authorized distributors?
All STM32C031C6T6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32C031C6T6 meets industry standards.
7.What is the process for return or replacement of STM32C031C6T6?
All STM32C031C6T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32C031C6T6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32C031C6T6 part is unused and in its original packaging.
Return procedure for STM32C031C6T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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