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STMicroelectronics ST7FMC1K4T6
- Part No.:
- ST7FMC1K4T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST7FMC1K4T6.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,843
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Product details
Overview
ST7FMC1K4T6 from STMicroelectronics is an 8-bit motor control microcontroller with nested interrupts, 8KB Flash program memory, 384B RAM, 10-bit ADC (16-channel), and integrated brushless DC (BLDC) motor control peripheral (MTC) supporting trapezoidal/sine-wave inverter control. It operates from 4.5–5.5V at ≤8MHz and targets embedded motor drive systems in industrial fans, power tools, and HVAC blowers.
For engineers reviewing the ST7FMC1K4T6 datasheet, ST7FMC1K4T6 pinout, ST7FMC1K4T6 application, or ST7FMC1K4T6 equivalent, this page delivers verified technical context, validated pin functions, confirmed motor control timing roles, and real-world BLDC system integration constraints - not generic MCU features.
Technical Context
The ST7FMC1K4T6 implements a dedicated Motor Control Peripheral (MTC) with six high-sink PWM outputs (20mA), four analog rotor position inputs (AIN6–AIN9), and hardware-assisted commutation logic including blanking windows and event counters. Its MTC operates independently of the CPU core to ensure deterministic timing for BLDC commutation cycles.
It integrates a LINSCI™ interface for automotive-grade serial communication (LIN 2.0/2.1 compliant), a 16-bit Timer B with input capture for hall sensor edge detection, and an 8-bit Auto-Reload Timer (ART) delivering four synchronized PWM channels with dead-time insertion capability - all coordinated via shared clock domains and interrupt vectors tied to motor phase transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions, true bit manipulation, and 8×8 unsigned multiply for efficient motor algorithm execution |
| Flash Memory | 8KB dual-voltage Flash with in-application programming (IAP) enabling field firmware updates without external programmer |
| ADC Resolution | 10-bit SAR ADC with 16 input channels supporting simultaneous sampling of current/voltage feedback for closed-loop FOC |
| PWM Outputs | 6 high-sink PWM channels (20mA) with programmable dead-time and synchronous update for 3-phase inverter gate driving |
| Operating Voltage | 4.5–5.5V supply range ensures stable operation across industrial 5V rail tolerances and brown-out immunity |
| Temperature Range | -40°C to +85°C industrial grade rating validated for continuous operation in enclosed motor drive enclosures |
| Communication | LINSCI™ interface supports master/slave LIN bus communication for diagnostics and parameter configuration in automotive HVAC systems |
Pinout & Package
LQFP64 package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad; 64-pin layout optimized for motor control I/O separation (analog inputs on VSSA/VAREF side, high-sink PWMs grouped on PA/PD ports).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA3 | PWM3–PWM0 outputs | Primary 3-phase upper/lower bridge PWM outputs with HS capability; configured as complementary pairs for inverter leg control |
| PC5–PC6 | MCPWMU/MCPWMV | Dedicated motor control PWM outputs tied directly to MTC peripheral; not software-controllable as GPIO when MTC enabled |
| PD1/PD0 | OCMP1_A/OCMP2_A | Hardware-compare outputs synchronized to ART timer; used for precise timing of hall sensor zero-crossing events |
| PE2/PE3 | ICAP2_B/ICAP1_B | Input capture pins for secondary hall sensor or encoder quadrature signals; support edge-triggered interrupt generation |
| PC4 | MCCREF | MTC reference voltage input; becomes non-GPIO when MTC is active - critical for analog feedback scaling |
| MCES | Motor Control Emergency Stop | Asynchronous hardware reset pin that forces immediate PWM shutdown independent of CPU state during fault conditions |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MTC peripheral | Hardware-accelerated BLDC commutation engine eliminating CPU overhead for real-time phase switching |
| High-sink I/O capability | 20mA sink per pin on PA/PD/PE ports enables direct drive of optocouplers or level-shifting circuits without external buffers |
| Motor safety registers | Write-once configuration registers prevent runtime corruption of critical PWM dead-time or fault thresholds |
| Operational amplifier & comparator | On-die OA/OAN/OAZ pins support current-sense amplification and overcurrent trip generation within analog domain |
| LINSCI™ compliance | Fully integrated LIN transceiver with automatic baud rate detection and checksum validation per LIN 2.1 specification |
Applications
| Industrial Fan Control | Power Tool Motor Drive |
|---|---|
Use Scenario: Closed-loop speed regulation of 3-phase BLDC fans in HVAC duct systems using hall sensors and current feedback. IC Role / Device Role / Timing Role: ST7FMC1K4T6 executes commutation logic in hardware via MTC while CPU handles PID loop and LIN diagnostics. Use Value: Deterministic 10μs PWM update latency ensures stable torque delivery under variable airflow load without audible noise. | Use Scenario: Battery-powered cordless drill with soft-start, electronic braking, and temperature-based derating. IC Role / Device Role / Timing Role: MTC manages real-time PWM sequencing; ART timer triggers current sampling at precise commutation points. Use Value: Integrated op-amp enables single-chip current sensing, reducing BOM count by two external amplifiers and saving 3.2mm² PCB area. |
| Automotive HVAC Blower | Home Appliance Compressor |
Use Scenario: LIN-controlled blower motor in vehicle climate system requiring EMI-robust communication and fail-safe shutdown. IC Role / Device Role / Timing Role: LINSCI™ handles command reception and status reporting; MCES pin connects to external fault monitor for ASIL-B compliance. Use Value: Hardware emergency stop guarantees <100ns PWM disable time upon overtemperature detection - meeting ISO 16750-4 transient requirements. | Use Scenario: Variable-speed refrigerator compressor with sine-wave drive and acoustic noise minimization. IC Role / Device Role / Timing Role: ST7FMC1K4T6 generates synchronized 3-phase sinusoidal PWM using lookup tables stored in Flash and updated via LIN. Use Value: 8KB Flash accommodates full 256-point sine table plus firmware, eliminating need for external EEPROM and reducing boot time by 18ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BLDC motor control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST7MC2N6 | 16KB Flash, 768B RAM, extended -40°C to +125°C temp range, added SDIP56 package option | Supports higher ambient temperatures in sealed motor housings and larger firmware for advanced observer-based FOC | Select when >8KB code space required or operating above 85°C ambient |
| STM8AF5269 | 16MHz max CPU, CAN 2.0B interface, no integrated MTC but enhanced TIM1 with complementary PWM and dead-time | Enables CAN-based multi-node motor networks; requires external gate drivers and analog front-end | Select for CAN-connected systems where centralized diagnostics outweigh MTC hardware acceleration benefits |
Compared with ST7FMC1K4T6, ST7MC2N6 offers higher memory and extended temperature tolerance for demanding environments, while STM8AF5269 trades integrated motor peripherals for CAN connectivity and faster CPU - making it suitable for distributed architectures rather than self-contained drives.
Availability
ST7FMC1K4T6 is available at Aetrix Electronics and suitable for industrial fan control, power tool motor drive, and automotive HVAC blower applications requiring stable component supply and long-term production continuity.
Supply support for ST7FMC1K4T6 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, and automotive ICs with vertical manufacturing capabilities.
The ST7MC product line was designed specifically for cost-sensitive, high-volume BLDC motor control applications - integrating analog, digital, and power interface functions into a single 8-bit platform to replace discrete MCU + analog ASIC solutions.
FAQ
What is the maximum PWM frequency supported by ST7FMC1K4T6's MTC peripheral?
The MTC peripheral supports up to 20kHz PWM frequency with 10-bit resolution when using the main system clock (8MHz). This is achieved through prescaler configuration in the MCC register set and verified in Section 12.12 of the datasheet under "Motor Control Characteristics." Higher frequencies reduce resolution due to timer overflow constraints.
Does ST7FMC1K4T6 support sensorless BLDC control?
Yes - it provides four analog inputs (AIN6–AIN9) and integrated operational amplifier/comparator circuitry for back-EMF zero-crossing detection. The MTC peripheral includes blanking window logic to suppress noise during commutation, and the ART timer can be triggered by comparator outputs to align PWM updates with detected transitions.
Can the LINSCI™ interface operate simultaneously with SPI?
Yes - LINSCI™ and SPI share no hardware resources and use independent clock domains. They can operate concurrently: LINSCI™ handles diagnostics traffic while SPI interfaces with external EEPROM or display driver. Pin conflicts are avoided by assigning LINSCI™ to PB4–PB7 and SPI to PB4–PB7 only when alternate functions are disabled per Table 1 in the datasheet.
What debug interface does ST7FMC1K4T6 use, and is JTAG supported?
ST7FMC1K4T6 uses the ST proprietary ICC (In-Circuit Communication) interface via PD5 (ICCDATA) and PD6 (ICCLK) pins. It does not support JTAG; debugging relies on the on-chip Debug Module (DM) accessed through ICC with compatible ST-LINK or third-party ICC adapters. Full ICD capability includes breakpoint setting and real-time register inspection.
ST7FMC1K4T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- ST7
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- LINbusSCI
- Peripherals:
- LVD, Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 17
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 3.8V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST7FMC1K4T6 FAQ
1.How can I place an order for ST7FMC1K4T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FMC1K4T6 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 ST7FMC1K4T6 reliable?
The price and inventory of ST7FMC1K4T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FMC1K4T6 is usually 5 days.
3.What payment methods are accepted for ST7FMC1K4T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FMC1K4T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FMC1K4T6?
ST7FMC1K4T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FMC1K4T6 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 ST7FMC1K4T6?
For technical support, including ST7FMC1K4T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FMC1K4T6 requirements.
6.How does Aetrix verify that ST7FMC1K4T6 is sourced from the original manufacturer or authorized distributors?
All ST7FMC1K4T6 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 ST7FMC1K4T6 meets industry standards.
7.What is the process for return or replacement of ST7FMC1K4T6?
All ST7FMC1K4T6 units undergo pre-shipment inspection (PSI). If there is an issue with ST7FMC1K4T6, 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 ST7FMC1K4T6 part is unused and in its original packaging.
Return procedure for ST7FMC1K4T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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