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STMicroelectronics STM32F051R8H7
- Part No.:
- STM32F051R8H7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32F051R8H7.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,272
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Product details
Overview
STM32F051R8H7 from STMicroelectronics is a 32-bit ARM® Cortex®-M0 microcontroller with 64 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, 12-bit ADC (1.0 µs conversion), and 12-bit DAC-designed for cost-sensitive industrial control, smart sensors, and low-power HMI applications requiring integrated analog peripherals and capacitive touch sensing.
For engineers reviewing the STM32F051R8H7 datasheet, STM32F051R8H7 pinout, STM32F051R8H7 application, or STM32F051R8H7 equivalent, key selection criteria include its 64-pin LQFP package, 55 fast I/Os (36 with 5 V tolerance), dual USARTs with IrDA/LIN support, two I²C interfaces (one Fast Mode Plus), and RTC with alarm/wakeup from Stop/Standby modes.
Technical Context
The STM32F051R8H7 integrates an ARM Cortex-M0 core with hardware parity-checked SRAM and CRC calculation unit, enabling robust real-time control in resource-constrained environments. Its clock system combines internal RC oscillators (8 MHz PLL-capable, 40 kHz LSI) with external crystal support (4–32 MHz HSE, 32.768 kHz LSE), delivering precise timing for RTC and communication peripherals.
It features a dedicated 16-bit advanced-control timer (TIM1) with 6-channel PWM, deadtime generation, and emergency stop-critical for motor control-and a 16-bit basic timer (TIM6) specifically synchronized to drive the DAC. The analog subsystem includes two programmable comparators, temperature sensor, and VREFINT for self-calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 48 MHz max - enables deterministic real-time execution with Thumb-2 instruction set and NVIC for low-latency interrupt handling. |
| Memory | 64 KB Flash + 8 KB SRAM with HW parity - supports firmware updates and data integrity in safety-aware embedded systems. |
| ADC | 12-bit, 1.0 µs conversion, up to 16 channels - delivers high-resolution sensor acquisition at >1 MSPS for industrial monitoring. |
| DAC | 12-bit single channel - provides precise analog output for calibration signals, audio tone generation, or actuator biasing. |
| Timers | 11 timers including TIM1 (advanced-control), TIM2/TIM3 (general-purpose), TIM6 (DAC sync), and watchdogs - enables complex PWM generation, IR decoding, and system supervision. |
| I/O Capability | 55 fast I/Os, 36 with 5 V tolerance - allows direct interfacing with legacy 5 V logic and industrial sensors without level shifters. |
| Communication | 2× I²C (1× Fast Mode Plus), 2× USART (1× ISO7816/LIN/IrDA), 2× SPI (1× with I²S) - supports multi-protocol connectivity in metering and HMI designs. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for manual soldering, thermal dissipation in compact industrial modules, and compatibility with standard PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Digital power supply and ground | Separate digital rail (2.0–3.6 V) with decoupling requirements per datasheet Section 6.1.6 - ensures stable core operation under dynamic load. |
| VDDA, VSSA | Analog power supply and ground | Independent analog domain (2.4–3.6 V) - isolates noise-sensitive ADC/DAC/comp blocks from digital switching transients. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/Os | 55 total GPIOs, many mappable to EXTI interrupts - enables flexible peripheral routing and wake-up from low-power modes. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up - supports external reset button or supervisor IC integration per Section 6.3.15. |
| BOOT0 | Boot mode selection | High at power-on selects system memory bootloader - enables field firmware recovery without debugger. |
| OSC_IN / OSC_OUT | HSE crystal oscillator interface | Supports 4–32 MHz external crystal - provides accurate clock source for USB-free timing-critical applications like motor control. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Sensing Controller (TSC) | Up to 18 channels supporting touchkey/linear/rotary sensors - eliminates external touch controller IC in HMI designs. |
| Low-Power Modes | Sleep, Stop, Standby with RTC/backup register retention - achieves sub-1 µA standby current (Section 6.3.27), extending battery life in portable devices. |
| Programmable Voltage Detector (PVD) | Configurable threshold (2.2–2.9 V) with interrupt - enables early brown-out detection and graceful shutdown before Flash corruption. |
| HDMI CEC Interface | Dedicated CEC physical layer with header wakeup - simplifies integration into consumer electronics remote control ecosystems. |
| 96-bit Unique ID | Factory-programmed serial number - supports secure device authentication and license binding in OEM firmware. |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers and small pumps using hall-effect or sensorless feedback. IC Role / Device Role / Timing Role: Real-time PWM generation via TIM1 with deadtime control, ADC sampling of phase currents, and LIN bus communication for system coordination. Use Value: Integrated advanced timer and 12-bit ADC eliminate external gate drivers and signal conditioning, reducing BOM count by ≥3 components. |
Use Scenario: Polyphase electricity meter with voltage/current sensing, tariff calculation, and optical/IR communication. IC Role / Device Role / Timing Role: Simultaneous sampling of multiple CT/PT inputs via ADC, RTC-based billing intervals, and IrDA/USART for utility data upload. Use Value: Hardware parity SRAM and PVD ensure data integrity during power dips, meeting IEC 62053 accuracy compliance. |
| Capacitive Touch HMI | Low-Power Sensor Node |
Use Scenario: Appliance control panel with slider, wheel, and button gestures in white goods. IC Role / Device Role / Timing Role: TSC-driven touch acquisition, LED dimming via PWM, and I²C interface to display driver. Use Value: On-chip TSC reduces external component count vs. dedicated touch ICs and supports <100 ms gesture response time. |
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and ambient light. IC Role / Device Role / Timing Role: Wake-on-interrupt from ultra-low-power Stop mode, ADC reading of analog sensors, and UART/CEC transmission of data. Use Value: Sub-1 µA Standby current with RTC alarm extends 2×AA battery life beyond 5 years per Section 6.3.27. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F070F6P6 | 32-pin LQFP, 32 KB Flash, no DAC, no TSC, only 1x USART | Limited I/O count and analog capability - suitable for simpler control tasks without touch or precision analog output | Select when footprint and cost are critical, and DAC/TSC are unnecessary. |
| STM32G030F6P6 | Newer G0-series, 32 KB Flash, 1x 12-bit ADC (1.14 µs), no DAC, no TSC, enhanced security features | Higher performance per MHz but lacks integrated touch sensing and analog output - better for secure boot and code protection | Choose for new designs prioritizing security and future roadmap alignment over legacy analog feature set. |
Compared with STM32F051R8H7, the STM32F070F6P6 trades analog integration and I/O count for lower cost and smaller size, while the STM32G030F6P6 offers modern architecture and security at the expense of DAC and TSC-making the F051R8H7 optimal for analog-rich, touch-enabled industrial edge nodes.
Availability
STM32F051R8H7 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, capacitive touch HMI, and low-power sensor node applications requiring stable component supply across long production lifecycles.
Supply support for STM32F051R8H7 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, specializing in microcontrollers, power management, and analog/mixed-signal ICs for industrial, automotive, and consumer markets.
The STM32F0 series targets cost-optimized, entry-level Cortex-M0 applications demanding rich analog integration, low-power operation, and broad ecosystem support-including STM32CubeMX and HAL libraries.
FAQ
What is the maximum operating temperature range for STM32F051R8H7?
The STM32F051R8H7 is qualified for industrial temperature range: –40 °C to +85 °C (ambient), as specified in Section 6.3.1 of the datasheet. It uses the LQFP64 package with JEDEC-standard thermal characteristics (θJA = 44 °C/W), enabling reliable operation in enclosed enclosures without forced airflow.
Does STM32F051R8H7 support USB connectivity?
No, the STM32F051R8H7 does not include a USB peripheral. It provides alternative communication interfaces: two USARTs (one with IrDA/LIN), two I²C buses (one Fast Mode Plus), two SPIs (one with I²S), and HDMI CEC. For USB functionality, designers should consider STM32F072 or STM32F042 variants.
How is the 12-bit DAC output buffered and driven?
The integrated 12-bit DAC has a rail-to-rail output with typical settling time of 6 µs and supports both buffer-on and buffer-off modes. When enabled, the internal buffer drives loads down to 5 kΩ; in buffer-off mode, output impedance is ~15 kΩ, requiring external op-amp buffering for low-impedance loads per Section 6.3.17.
Can STM32F051R8H7 be programmed via SWD without external reset?
Yes. Serial Wire Debug (SWD) programming and debugging are fully supported using SWCLK and SWDIO pins (PA14/PA13). No external NRST connection is required for debug session initiation, though NRST remains necessary for full system reset during firmware update sequences per Section 3.20.
STM32F051R8H7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA
- Series:
- STM32F0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- HDMI-CEC, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 55
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 19x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F051R8H7 FAQ
1.How can I place an order for STM32F051R8H7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F051R8H7 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 STM32F051R8H7 reliable?
The price and inventory of STM32F051R8H7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F051R8H7 is usually 5 days.
3.What payment methods are accepted for STM32F051R8H7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F051R8H7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F051R8H7?
STM32F051R8H7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F051R8H7 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 STM32F051R8H7?
For technical support, including STM32F051R8H7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F051R8H7 requirements.
6.How does Aetrix verify that STM32F051R8H7 is sourced from the original manufacturer or authorized distributors?
All STM32F051R8H7 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 STM32F051R8H7 meets industry standards.
7.What is the process for return or replacement of STM32F051R8H7?
All STM32F051R8H7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F051R8H7, 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 STM32F051R8H7 part is unused and in its original packaging.
Return procedure for STM32F051R8H7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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