STMicroelectronics STM32F302RET6

Overview

STM32F302RET6 from STMicroelectronics is a 32-bit ARM® Cortex®-M4 microcontroller with FPU, 72 MHz max clock, 512 KB Flash, 64 KB SRAM, and integrated analog peripherals including two 12-bit ADCs (0.20 µs conversion), one 12-bit DAC, four rail-to-rail comparators, and two operational amplifiers-designed for real-time motor control and sensor signal conditioning in industrial drives.

For engineers reviewing the STM32F302RET6 datasheet, STM32F302RET6 pinout, STM32F302RET6 application, or STM32F302RET6 equivalent, key selection criteria include its dual ADC sampling capability, programmable gain amplifier (PGA) support via op-amps, CAN 2.0B interface, and 5 V-tolerant I/Os enabling direct interfacing with legacy industrial logic.

Technical Context

The device integrates an ARM Cortex-M4 core with hardware floating-point unit and memory protection unit (MPU), supporting deterministic real-time execution. Its analog subsystem features independent VDDA supply (2.4–3.6 V) for DAC and op-amps, and separate 2.0–3.6 V analog domain for ADCs and comparators-enabling mixed-signal coexistence without noise coupling.

Timing architecture includes three clock sources: 4–32 MHz HSE crystal, 32 kHz LSE for RTC, and internal 8 MHz HSI with PLL multiplication up to 72 MHz. The interconnect matrix enables concurrent peripheral access without bus contention, critical for simultaneous ADC sampling, PWM generation, and CAN messaging.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F302RET6, STM32F303RET6 trades FSMC for enhanced ADC accuracy and bootloader flexibility, while STM32G431KBT6 delivers superior compute throughput and analog density but omits CAN-making the F302RET6 uniquely balanced for cost-sensitive industrial motion control with fieldbus connectivity.

Availability

STM32F302RET6 is available at Aetrix Electronics and suitable for industrial motor drives, energy meters, human-machine interfaces, and medical sensor nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32F302RET6 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 analog/mixed-signal ICs for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-effective, analog-rich embedded control-designed specifically for applications demanding high-precision signal acquisition, real-time processing, and compact integration of motor control peripherals.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F302RET6 achieves a maximum CPU frequency of 72 MHz using its internal 8 MHz HSI oscillator multiplied by a programmable PLL. External 4–32 MHz crystal (HSE) can also feed the PLL for higher stability. All peripherals operate synchronously at this frequency unless prescaled, and the FPU enables single-cycle floating-point operations essential for motor control algorithms.

Does this MCU support hardware CRC calculation and why does it matter?

Yes, it includes a dedicated cyclic redundancy check (CRC) calculation unit compliant with IEEE-802.3. This accelerates firmware image validation, EEPROM data integrity checks, and communication packet verification without burdening the CPU-critical for functional safety compliance (e.g., IEC 61508 SIL-2) and robust over-the-air update mechanisms.

How many analog channels can be sampled simultaneously and what is the timing relationship?

Two independent 12-bit ADCs allow true simultaneous sampling of up to 18 channels (9 per ADC). They share a common trigger source (e.g., TIM1 TRGO) with sub-nanosecond skew, enabling synchronized acquisition of phase currents in 3-phase systems-essential for accurate Clarke/Park transforms in field-oriented control.

Is the USB interface self-powered and does it require an external PHY?

No external PHY is required: the STM32F302RET6 integrates a full-speed USB 2.0 transceiver with internal pull-up resistors and descriptor handling. It operates in self-powered mode using VDD (3.3 V), eliminating external components. However, VBUS sensing and enumeration logic must be implemented in firmware per USB specification.