STMicroelectronics STR752FR2H7

Overview

STR752FR2H7 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 interface, USB Full-Speed (12 Mb/s), and six 16-bit timers including a motor-control PWM timer with dead-time generation - deployed in industrial motor drives and embedded control systems requiring deterministic real-time response.

For engineers reviewing the STR752FR2H7 datasheet, STR752FR2H7 pinout, STR752FR2H7 application, or STR752FR2H7 equivalent, key selection considerations include its LFBGA64 8×8 mm package, dual-voltage operation (3.3V or 5V), -40°C to +105°C extended temperature range, 60 MHz max CPU frequency, and hardware support for DMA-driven UART/SSP/ADC/PWM peripherals.

Technical Context

The STR752FR2H7 implements an ARM7TDMI-S core with 54 DMIPS @ 60 MHz, coupled 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), 16 KB RWW Flash for parameter storage, and SMI interface enabling boot-from-external-serial-Flash capability.

Peripheral timing is managed via a flexible clock system: internal 5 MHz RC oscillator for fast startup, PLL-based AHB/APB scaling up to 60/32 MHz, dedicated 48 MHz USB clock derived from PLL, and independent RTC clocking via 32.768 kHz crystal or calibrated low-power RC oscillator.

Key Specifications

Pinout & Package

LFBGA64 (8 × 8 × 1.7 mm) package with 0.5 mm pitch, thermally enhanced for industrial ambient conditions up to +105°C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STR751FR2H7, the STR752FR2H7 adds USB and doubles Flash capacity for dual-firmware or bootloader+application partitioning; versus STM32F103C8T6, it offers superior CAN 2.0B compliance, RWW Flash for safe parameter updates, and proven industrial temperature validation.

Availability

STR752FR2H7 is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers, medical infusion pumps, and uninterruptible power supplies requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for STR752FR2H7 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 control applications demanding robust real-time performance, multi-protocol connectivity (CAN/USB), and extended temperature reliability - bridging legacy ARM7 ecosystems with modern embedded requirements.

FAQ

Does STR752FR2H7 support both 3.3V and 5V operation simultaneously?

No. The device operates on a single supply: either 3.3V ±10% or 5V ±10%. When powered at 5V, USB functionality is disabled per datasheet specification. I/O voltage levels track the selected VDDIO rail, and internal regulators generate 1.8V core voltage accordingly.

What is the maximum achievable CAN bit rate on STR752FR2H7?

The CAN controller supports bit rates up to 1 Mbps under standard electrical conditions, compliant with ISO 11898-2. Achievable rate depends on bus length, termination, and transceiver characteristics; the internal CAN clock prescaler allows fine-grained timing configuration for precise bit timing alignment.

Can STR752FR2H7 execute code directly from external serial Flash via SMI?

Yes. The Serial Memory Interface (SMI) supports XIP (eXecute-In-Place) from up to 64 MB of external serial Flash. Boot mode pins configure SMI as primary boot source, and the AHB bus maps external Flash into the memory space for direct instruction fetch without copying to internal RAM.

Is the 16 KB RWW Flash bank electrically isolated from the main 256 KB Flash bank?

Yes. Bank 1 (16 KB RWW) is physically separate from Bank 0 (256 KB). It supports concurrent read and write operations - enabling firmware background updates while application code runs from Bank 0, with hardware-implemented readout and write protection registers for security.