STMicroelectronics STR752FR2T7

Overview

STR752FR2T7 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 interface, USB Full-Speed (12 Mb/s), and a 16-channel 10-bit ADC (11 channels in LQFP64 package). It operates at up to 60 MHz, supports dual supply (3.3V or 5V), and targets industrial motor control and embedded communication systems.

For engineers reviewing the STR752FR2T7 datasheet, STR752FR2T7 pinout, STR752FR2T7 application, or STR752FR2T7 equivalent, key selection criteria include its CAN+USB coexistence in LQFP100 packages, 60 MHz ARM7 performance, 11-channel ADC timing (min. 3.75 µs conversion), and support for real-time clock with backup oscillator - critical for alarm systems, PLCs, and brushless DC motor drives.

Technical Context

The STR752FR2T7 implements an ARM7TDMI-S core with 54 DMIPS @ 60 MHz, paired with a nested interrupt controller supporting 32 vectors and 16 IRQ priorities. Its memory subsystem includes burst-mode Flash access (0 wait states @ 60 MHz sequential) and zero-wait-state SRAM.

It integrates a dedicated motor-control PWM timer with dead-time generation, edge/center-aligned waveforms, and synchronization with three standard 16-bit timers - all accessible via DMA. The CAN interface complies fully with ISO 11898-1:2003 (2.0B Active), supporting both standard (11-bit) and extended (29-bit) frames at up to 1 Mb/s.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad. Pinout validated per STMicroelectronics Doc ID13586 Rev 5 (pages 15–21).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STR751FR2T6, STR752FR2T7 adds CAN+USB coexistence and doubles Flash capacity - essential for firmware-over-CAN updates. Versus STM32F103C8T6, it offers superior motor timing precision and true RWW Flash, but trades Cortex-M3 efficiency for ARM7 compatibility and mature tooling.

Availability

STR752FR2T7 is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers, uninterruptible power supplies, and medical monitoring devices requiring stable component supply across multi-year production cycles.

Supply support for STR752FR2T7 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, designing and manufacturing microcontrollers, power ICs, sensors, and automotive semiconductors since 1987.

The STR750 family was engineered for industrial real-time control applications demanding CAN/USB dual connectivity, deterministic timing, and extended temperature resilience - bridging legacy ARM7 ecosystems with modern peripheral integration.

FAQ

Does STR752FR2T7 support simultaneous CAN and USB operation?

Yes - in the LQFP100 package, CAN and USB operate concurrently. However, STR752FR2T7 uses the LQFP64 package, where CAN and USB share physical pins and cannot be enabled simultaneously. This limitation is documented in Section 2.2 of the datasheet and confirmed in Table 2 (Device Overview).

What is the maximum ADC sampling rate achievable with DMA transfer?

The minimum conversion time is 3.75 µs, enabling up to 267 kSPS in single-channel mode. When using DMA with FIFO-triggered transfers and optimized APB clocking (32 MHz), sustained throughput reaches 220 kSPS across multiple channels - verified in Application Note AN2834 (STR750 ADC Performance).

Can the internal 1.8V voltage regulator power external circuitry?

No - the internal VCORE regulator supplies only the MCU core logic. Its output is not accessible externally. For powering external 1.8V components, use Power Scheme 2 or 4 (dual-supply mode) with external 1.8V rail connected to V18/V18REG pins, as defined in Section 6.1.6.

Is the RWW Flash bank protected against accidental writes?

Yes - STR752FR2T7 implements Flash Readout and Write Protection (FRWPP) via dedicated option bytes. Once enabled, writes to Bank 1 require unlocking via specific KEY sequence and erase/write commands - preventing unintended modification during field operation.