STMicroelectronics STR755FR0T6

Overview

STR755FR0T6 from STMicroelectronics is an ARM7TDMI-S™ 32-bit microcontroller with 256 KB Flash (Bank 0), 16 KB RWW Flash (Bank 1), 16 KB SRAM, integrated CAN 2.0B and USB Full-Speed interfaces, and a 16-channel 10-bit ADC - designed for motor control, industrial automation, and embedded connectivity applications requiring real-time I/O, deterministic timing, and dual-voltage (3.3V/5V) operation.

For engineers reviewing the STR755FR0T6 datasheet, STR755FR0T6 pinout, STR755FR0T6 application, or STR755FR0T6 equivalent, this MCU delivers verified CAN+USB coexistence in LQFP64 package, 60 MHz ARM7 performance (54 DMIPS), hardware-accelerated PWM with dead-time generation, and nested interrupt handling across 32 vectors - critical for brushless DC motor drives, programmable logic controllers, and USB-connected industrial peripherals.

Technical Context

The STR755FR0T6 integrates an ARM7TDMI-S core with tightly coupled peripherals including a dedicated 16-bit 6-channel synchronizable PWM timer supporting edge/center-aligned waveforms and emergency stop, plus three 16-bit standard timers with input capture and output compare - all linked via Timer Link for coordinated event chaining in motor control loops.

Its communication subsystem includes one CAN 2.0B controller (1 Mbps), one USB 12 Mbps full-speed device interface (48 MHz clock derived internally from PLL), three UARTs (up to 2 Mbps, LIN-capable), two SSPs (SPI/SSI, up to 16 Mbps), and one I²C interface - all DMA-capable and independently clocked via AHB/APB bus matrix.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad; 38 GPIOs (including high-sink capability), 13 wake-up lines, and dedicated pins for CANH/CANL, USB_DP/USB_DM, and crystal oscillator (XT1/XT2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ARM7-based microcontroller applications.

Compared with STR755FR0T6, STR751FR0T6 sacrifices CAN for lower cost and smaller Flash, while STR755FV0T6 trades LQFP manufacturability for higher I/O count and extended temperature rating - making STR755FR0T6 the optimal balance of CAN+USB integration, thermal robustness, and standard packaging for mid-volume industrial designs.

Availability

STR755FR0T6 is available at Aetrix Electronics and suitable for brushless motor drives, industrial PLC modules, USB human interface devices, and energy monitoring gateways requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STR755FR0T6 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, sensors, and automotive ICs.

The STR750 family was engineered for industrial and appliance applications demanding real-time determinism, dual-voltage flexibility, and integrated fieldbus connectivity - positioning STR755FR0T6 as a CAN+USB-enabled variant optimized for motor control and distributed automation.

FAQ

Does STR755FR0T6 support simultaneous CAN and USB operation?

Yes - STR755FR0T6 supports concurrent CAN 2.0B and USB Full-Speed operation in LQFP64 package. The USB PHY requires 3.3 V ±10% supply, while CAN operates across the full 3.3 V/5 V range. Internal clock routing isolates USB's 48 MHz clock (derived from PLL) from CAN's bit-timing logic, enabling independent real-time messaging on both buses without resource conflict.

What is the maximum ADC sampling rate achievable with STR755FR0T6?

The minimum conversion time is 3.75 µs per sample, enabling up to 266.7 kSPS in continuous scan mode. With DMA-driven transfers and programmable FIFO depth, sustained throughput reaches 200 kSPS while maintaining CPU availability for control tasks - validated under worst-case conditions (VDD = 3.3 V, TA = 85°C).

How does the RWW Flash bank enhance firmware update reliability?

The 16 KB RWW Flash (Bank 1) allows application code executing from Bank 0 to erase and reprogram Bank 1 without halting real-time operations. This enables safe over-the-air or CAN-based firmware updates with rollback capability, preserving critical parameters like motor calibration constants or network IDs across resets.

Can STR755FR0T6 operate in extended temperature range?

No - STR755FR0T6 is rated for −40°C to +85°C ambient operation. For extended temperature support (−40°C to +105°C), select STR755FR2T6 or STR755FV0T6 variants, which share identical peripherals and memory but are qualified across the wider junction temperature range per ST's specification table.