STMicroelectronics ST7FMC2R7T6

Overview

ST7FMC2R7T6 from STMicroelectronics is an 8-bit motor control microcontroller with nested interrupts, 60KB Flash program memory, 1.5KB RAM, 10-bit ADC (16-channel), and integrated brushless DC (BLDC) motor control peripheral (MTC). It features six high-sink PWM outputs, four rotor position analog inputs, operational amplifier/comparator, and LINSCI™ serial interface. Designed for embedded BLDC inverter control in industrial fans, power tools, and HVAC blowers.

For engineers reviewing the ST7FMC2R7T6 datasheet, ST7FMC2R7T6 pinout, ST7FMC2R7T6 application, or ST7FMC2R7T6 equivalent, this page delivers verified technical context, validated pin functions, real-world motor control use cases, and confirmed alternative options - all grounded in the official ST7MC2xx reference manual (Rev 13, April 2009).

Technical Context

The ST7FMC2R7T6 implements a dedicated Motor Control Peripheral (MTC) with permanent magnet motor coprocessor logic, including multiplier, programmable filters, blanking windows, and event counters. Its MTC supports both sensor-based (Hall/tacho/encoder) and sensorless commutation via 4 analog rotor position inputs and 6 high-sink PWM channels (20 mA sink capability per channel).

It integrates dual 16-bit timers (Timer A/B) with input capture, output compare, external clock input, and PWM generation; an 8-bit auto-reload timer (ART) with 4 PWM outputs and event detection; and a LINSCI™ interface compliant with LIN 1.3/2.0 master/slave protocols - all synchronized to a configurable main clock controller with real-time base and beep generator.

Key Specifications

Pinout & Package

LQFP80 package (14 × 14 mm, 0.5 mm pitch), thermally enhanced for motor control thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar BLDC motor control applications.

Compared with ST7FMC2R7T6, STSPIN32F0A shifts complexity to integrated power stage control but removes analog front-end flexibility, while STM8AF6266 trades dedicated motor peripherals for broader MCU versatility - making ST7FMC2R7T6 optimal for LIN-connected, sensor-inclusive BLDC systems needing deterministic hardware timing.

Availability

ST7FMC2R7T6 is available at Aetrix Electronics and suitable for industrial fan control, power tool motor drives, and automotive HVAC blower systems requiring stable component supply, long-term lifecycle assurance, and qualified −40°C to +125°C operation.

Supply support for ST7FMC2R7T6 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 microcontrollers, power devices, and analog ICs for industrial, automotive, and consumer markets.

The ST7MC2xx product line was engineered specifically for cost-effective, high-reliability BLDC motor control - integrating dedicated peripherals (MTC, OA, LINSCI) to reduce external component count and firmware development time in appliance and industrial drives.

FAQ

What is the maximum CPU frequency supported by ST7FMC2R7T6?

The ST7FMC2R7T6 operates at up to 8 MHz CPU frequency when supplied at 4.5–5.5 V. This limit is defined by its Flash memory timing and internal clock tree architecture - exceeding 8 MHz risks instruction fetch errors and violates the absolute maximum ratings in Section 12.5 of the datasheet.

Does ST7FMC2R7T6 support sensorless BLDC control out of the box?

Yes. The MTC peripheral includes hardware-assisted sensorless commutation using back-EMF zero-crossing detection on four analog inputs (AIN0–AIN3), with programmable blanking windows and event counters - enabling immediate implementation without custom firmware timing loops.

Can ST7FMC2R7T6 be programmed in-circuit after soldering?

Yes. It supports In-Circuit Programming (ICP) via the ICC interface using pins PD5 (ICCDATA) and PD4 (ICCCLK), with VPP applied to pin 1 (ICCSEL/VPP). This allows field firmware updates without removing the device from the PCB.

Is the MCES pin electrically isolated from the main I/O power domain?

No. MCES is a dedicated input pin tied directly to the internal interrupt controller and MTC safety logic, but it shares the same VDD_0 supply domain as Port A/D/E/F. Its asynchronous assertion triggers immediate PWM disable regardless of CPU state - no isolation is required because the function is implemented in hardened logic, not software.