STMicroelectronics STR755FV1T6

Overview

STR755FV1T6 from STMicroelectronics is a 32-bit ARM7TDMI-S™ 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 (11 channels in LQFP64 package). It operates at up to 60 MHz, supports dual supply (3.3 V ±10% or 5 V ±10%), and targets motor control, industrial communication gateways, and embedded USB-CAN bridge applications.

For engineers reviewing the STR755FV1T6 datasheet, STR755FV1T6 pinout, STR755FV1T6 application, or STR755FV1T6 equivalent, key selection criteria include its dual-voltage operation, CAN+USB coexistence in LQFP100 (not supported in LQFP64), 16-bit synchronizable PWM timer with dead-time generation, nested interrupt controller with 32 vectors, and SMI interface for external serial Flash booting.

Technical Context

The STR755FV1T6 implements an ARM7TDMI-S core with 54 DMIPS @ 60 MHz, coupled with a dedicated 48 MHz USB clock derived from the internal PLL - eliminating need for external crystal. Its memory architecture separates program execution (Bank 0 Flash) from parameter storage (Bank 1 RWW Flash), enabling safe over-the-air updates without halting real-time operation.

Peripheral timing is tightly coordinated: the 3 standard 16-bit timers (TIM0–TIM2) and motor-control PWM timer synchronize via Timer Link; ADC conversion triggers can be sourced from TIM outputs; and DMA channels serve UART0, SSP0, PWM, TIM0, and ADC - enabling zero-CPU-overhead data pipelines for sensor acquisition and motor feedback loops.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, operating ambient temperature range: –40 °C to +85 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6 and LPC2368, the STR755FV1T6 uniquely combines ARM7TDMI-S compatibility, true RWW Flash partitioning, SMI boot capability, and sub-10 µA STOP-mode current - making it optimal for certified medical devices and industrial gateways requiring firmware resilience and low-power supervision.

Availability

STR755FV1T6 is available at Aetrix Electronics and suitable for industrial motor control, CAN/USB protocol bridging, and medical device subsystems requiring stable component supply across extended product lifecycles.

Supply support for STR755FV1T6 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 designed specifically for industrial and appliance applications demanding robust real-time control, dual-voltage flexibility, and integrated CAN/USB connectivity - with emphasis on motor drive, energy metering, and smart grid edge devices.

FAQ

Does STR755FV1T6 support simultaneous CAN and USB operation?

Yes, but only in LQFP100 and LFBGA100 packages. The STR755FV1T6 is an LQFP64 variant; in this package, CAN and USB share physical pins and cannot operate concurrently. Designers must choose one interface or migrate to STR755FR2 (LQFP100) for dual-interface support.

What is the maximum ADC sampling rate achievable with STR755FV1T6?

The minimum conversion time is 3.75 µs per sample, enabling up to 267 kSPS in single-channel mode. In scan mode with 11 channels, effective throughput is ~24 kSPS per channel. DMA-triggered continuous sampling avoids CPU overhead and supports real-time current loop control.

How does the Read-While-Write (RWW) Flash function in practice?

The 16 KB RWW Flash (Bank 1) allows code execution from Bank 0 while erasing/programming Bank 1 - critical for safe firmware updates. Applications use it to store calibration data, device IDs, or user settings. Access requires unlocking via specific sequence and adheres to 100k write/erase cycle endurance.

Is external crystal mandatory for USB operation?

No. The internal PLL generates the required 48 MHz USB clock from the 4 MHz or 8 MHz external crystal or ceramic resonator. An external 48 MHz crystal is not supported or needed; using the internal PLL ensures synchronization with AHB clock and eliminates extra BOM cost and layout complexity.