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STMicroelectronics STR752FR2T6
- Part No.:
- STR752FR2T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STR752FR2T6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,356
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Product details
Overview
STR752FR2T6 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), three high-speed UARTs, two SSP interfaces, I²C, six 16-bit timers (including motor-control PWM timer with dead-time generation), and a 10-bit ADC with 11 input channels - designed for industrial motor control and embedded connectivity applications in LQFP64 package.
For engineers reviewing the STR752FR2T6 datasheet, STR752FR2T6 pinout, STR752FR2T6 application, or STR752FR2T6 equivalent, this MCU delivers deterministic real-time control with dual-voltage operation (3.3V or 5V), nested interrupt handling (32 vectors, 16 IRQ priorities), DMA-accelerated peripherals (UART0, SSP0, PWM, TIM0, ADC), and boot flexibility across internal Flash, external serial Flash via SMI, SRAM, or UART bootloader.
Technical Context
The STR752FR2T6 implements an ARM7TDMI-S core running at up to 60 MHz (54 DMIPS), with on-chip voltage regulators supporting single-supply 3.3V ±10% or 5V ±10% operation. Its clock system includes internal RC oscillators (5 MHz fast-start, 300 kHz low-power), PLL-based AHB/APB scaling, and dedicated 48 MHz USB clock generation - enabling concurrent 60 MHz CPU, 48 MHz USB, and 30 MHz APB operation from a 4 MHz crystal.
It integrates a 16-channel (11-channel in LQFP64) 10-bit ADC with programmable scan mode, FIFO, analog watchdog, and timer-triggered conversion; a motor-control PWM timer with edge/center-aligned waveforms, 6-channel output, and emergency stop; and a Serial Memory Interface (SMI) supporting boot and code execution from up to 64 MB external serial Flash.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM7TDMI-S 32-bit RISC CPU @ up to 60 MHz (54 DMIPS); enables legacy ARM7 toolchain compatibility and deterministic interrupt latency. |
| Flash Memory | 256 KB Bank 0 + 16 KB RWW Bank 1 (10k/100k write cycles, 20-yr data retention @ 85°C); supports firmware updates without halting execution. |
| SRAM | 16 KB on-chip SRAM accessed at CPU clock speed with zero wait states; suitable for real-time stack and buffer storage. |
| ADC | 10-bit resolution, 11-channel (LQFP64), min. 3.75 µs conversion time, programmable scan/FIFO/watchdog; meets precision sensing needs in motor feedback loops. |
| PWM Timer | 16-bit 6-channel synchronizable motor-control PWM with dead-time insertion, edge/center-aligned modes, and emergency stop; directly drives 3-phase BLDC/induction inverters. |
| CAN Interface | CAN 2.0B Active compliant, up to 1 Mb/s bit rate, 32-message object RAM buffer; enables robust fieldbus communication in industrial automation. |
| USB Interface | Full-Speed (12 Mb/s) device-only peripheral with 8 configurable endpoints, suspend/resume, and 48 MHz clock derived from internal PLL; requires 3.3V supply only. |
| Package | LQFP64 (10 × 10 mm, 0.5 mm pitch); provides 38 GPIOs with atomic bit-set/reset, high sink capability, and remappable timer alternate functions. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; 38 general-purpose I/O pins, including dedicated CAN_RX/CAN_TX, USB_DP/USB_DM, and remappable timer/PWM/ADC function pins.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDD_IO | Power supply inputs | VDD = core logic (1.8V internally regulated); VDD_IO = I/O bank (3.3V or 5V); both required active in all operating modes. |
| CAN_RX / CAN_TX | CAN physical layer interface | Differential pair for ISO 11898-compliant CAN bus communication; supports 1 Mb/s with internal termination options. |
| USB_DP / USB_DM | USB Full-Speed differential data lines | Require 3.3V supply and external 1.5 kΩ pull-up on DP; enable plug-and-play device enumeration without external PHY. |
| PA0–PA15, PB0–PB15, PC0–PC7 | General-purpose I/O ports | 38 total GPIOs with atomic SET/RES registers, high sink current (>20 mA), and remappable alternate functions for timers, PWM, ADC, UART. |
| OSC_IN / OSC_OUT | External crystal oscillator connection | Supports 4 MHz or 8 MHz ceramic resonator/crystal; used by PLL for AHB/APB/USB clock derivation. |
| BOOT0 / BOOT1 | Boot mode selection inputs | Configure boot source: internal Flash, external serial Flash (via SMI), internal SRAM, or UART bootloader - critical for field firmware recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Read-While-Write Flash | 16 KB RWW Bank 1 allows background parameter storage and firmware patching without CPU stall or Flash erase interruption. |
| Nested Interrupt Controller | 32-vector, 16-priority EIC reduces worst-case interrupt latency to <1 µs - essential for time-critical motor commutation events. |
| Serial Memory Interface (SMI) | Direct boot and XIP from up to 64 MB external serial Flash; eliminates need for external parallel memory or boot ROM. |
| Low-Power Modes | Five modes (SLOW, WFI, STOP, STANDBY, PCG) with RTC retention in STOP and V18_BKP-backed wake-up; achieves <1 µA standby current. |
| DMA Acceleration | 4-channel controller with circular buffer support for UART0, SSP0, PWM, TIM0, and ADC - offloads CPU during high-throughput data transfers. |
| Motor Control PWM | 6-channel synchronized output with programmable dead-time, emergency stop input, and center-aligned modulation - simplifies inverter gate driver design. |
Applications
| Industrial Motor Drives | Smart Power Supplies |
|---|---|
|
Use Scenario: Closed-loop control of 3-phase brushless DC motors in HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Real-time execution of FOC (Field-Oriented Control) algorithms using PWM timer synchronization, ADC sampling, and CAN-based command interface. Use Value: Integrated 6-channel PWM with dead-time prevents shoot-through; 11-channel ADC captures phase currents and DC-link voltage simultaneously. |
Use Scenario: Digital control of isolated AC/DC and DC/DC power supplies with remote monitoring and fault logging. IC Role / Device Role / Timing Role: System supervisor and communications hub managing voltage/current regulation, thermal protection, and USB/CAN telemetry reporting. Use Value: Dual-voltage operation (3.3V/5V) interfaces directly with optocouplers and analog sensors; USB enables firmware updates and debug without JTAG. |
| Programmable Logic Controllers | Medical Infusion Pumps |
|
Use Scenario: Compact PLC modules requiring deterministic I/O scanning, ladder logic execution, and fieldbus interoperability. IC Role / Device Role / Timing Role: Central controller coordinating digital I/O expansion, analog input conditioning, and CANopen or Modbus RTU protocol stacks. Use Value: 38 GPIOs with atomic bit manipulation ensure glitch-free output toggling; CAN 2.0B supports multi-node distributed control networks. |
Use Scenario: Battery-powered infusion pump with precise flow-rate control, alarm management, and USB host connectivity for configuration. IC Role / Device Role / Timing Role: Safety-critical timing engine managing stepper motor sequencing, pressure sensor sampling, and real-time clock-based dose scheduling. Use Value: STANDBY mode with RTC alarm wake-up extends battery life; 10-bit ADC meets IEC 60601-1 accuracy requirements for analog transducer inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ARM7-based industrial microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STR751FR2T6 | 128 KB Flash (Bank 0), same 16 KB RWW Flash, 16 KB SRAM, identical peripherals and pinout; lacks USB interface. | Suitable where CAN + motor control is required but USB device functionality is unnecessary - reduces BOM cost and layout complexity. | Select when USB is not needed and Flash budget is ≤128 KB; shares same footprint and software compatibility. |
| STM32F103C8T6 | Cortex-M3 core (72 MHz), 64 KB Flash, 20 KB SRAM, no CAN 2.0B (only bxCAN), no SMI, no RWW Flash, different peripheral register map. | Offers higher performance and lower power per DMIPS but requires full firmware porting; lacks SMI boot and true RWW capability. | Choose for new designs prioritizing modern Cortex-M ecosystem and tooling; avoid if legacy ARM7 codebase or SMI boot is mandatory. |
Compared with STR751FR2T6, STR752FR2T6 adds USB Full-Speed and doubles Flash capacity - critical for field-upgradable firmware with embedded web server or USB mass storage. Versus STM32F103C8T6, it retains ARM7 deterministic latency and SMI boot but trades Cortex-M3 efficiency for proven industrial reliability in extended temperature environments.
Availability
STR752FR2T6 is available at Aetrix Electronics and suitable for industrial motor drives, smart power supplies, programmable logic controllers, and medical infusion pumps requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability under extended temperature conditions (-40°C to +105°C).
Supply support for STR752FR2T6 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 with vertical manufacturing and broad industrial IP portfolio.
The STR750 family was engineered for deterministic real-time control in harsh industrial environments, integrating ARM7TDMI-S with CAN, USB, motor-control PWM, and dual-voltage operation - targeting appliance, energy, and medical equipment designers needing field-proven reliability and long product lifecycles.
FAQ
Does STR752FR2T6 support simultaneous CAN and USB operation?
No. In the LQFP64 package variant (including STR752FR2T6), CAN and USB cannot operate concurrently due to shared pin resources and internal routing constraints documented in Section 4.1 of the datasheet. Designers must choose one interface or implement external multiplexing at the system level.
What is the maximum ADC sampling rate achievable with DMA and timer triggering?
The minimum conversion time is 3.75 µs, enabling up to 266.7 kSPS in continuous scan mode. When triggered by a 60 MHz timer and serviced via DMA, sustained throughput reaches 250 kSPS across 11 channels with FIFO buffering - verified in Application Note AN2834 using TIM2 as trigger source.
How is the 16 KB RWW Flash bank protected against accidental writes?
RWW Flash protection is enforced through dedicated Flash Option Bytes (RDP and WRP bits) programmed via the STR7 Flash Programming Interface. Once set, write/erase operations to Bank 1 require unlocking via specific key sequences and are blocked during normal execution unless explicitly enabled by firmware.
Can STR752FR2T6 operate from a 5V supply while using USB?
No. USB operation mandates VDD within 3.3V ±10% (3.0–3.6V). When powered from 5V, the internal voltage regulator generates VCORE, but USB_DP/DM signaling becomes non-compliant and enumeration fails - confirmed in Section 6.3.11 of the datasheet and validated on ST evaluation boards.
STR752FR2T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STR7
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM7®
- Core Size:
- 32-Bit Single-Core
- Speed:
- 60MHz
- Connectivity:
- CANbus, I2C, SPI, SSI, SSP, UART/USART
- Peripherals:
- DMA, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 11x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STR752FR2T6 FAQ
1.How can I place an order for STR752FR2T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STR752FR2T6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STR752FR2T6 reliable?
The price and inventory of STR752FR2T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STR752FR2T6 is usually 5 days.
3.What payment methods are accepted for STR752FR2T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STR752FR2T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STR752FR2T6?
STR752FR2T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STR752FR2T6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STR752FR2T6?
For technical support, including STR752FR2T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STR752FR2T6 requirements.
6.How does Aetrix verify that STR752FR2T6 is sourced from the original manufacturer or authorized distributors?
All STR752FR2T6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STR752FR2T6 meets industry standards.
7.What is the process for return or replacement of STR752FR2T6?
All STR752FR2T6 units undergo pre-shipment inspection (PSI). If there is an issue with STR752FR2T6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STR752FR2T6 part is unused and in its original packaging.
Return procedure for STR752FR2T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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