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STMicroelectronics STR755FV2T6
- Part No.:
- STR755FV2T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STR755FV2T6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,712
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Product details
Overview
STR755FV2T6 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 USB Full-Speed (12 Mb/s) and CAN 2.0B interfaces, 10-bit ADC (11 channels), six 16-bit timers including motor-control PWM with dead-time generation, and support for 3.3V or 5V single-supply operation - deployed in industrial motor drives and embedded control systems requiring real-time I/O, deterministic timing, and dual-protocol connectivity.
For engineers reviewing the STR755FV2T6 datasheet, STR755FV2T6 pinout, STR755FV2T6 application, or STR755FV2T6 equivalent, this device delivers verified ARM7-based deterministic execution at 60 MHz (54 DMIPS), on-chip memory protection, hardware-accelerated motor control waveforms, and simultaneous USB/CAN host-peripheral coexistence in LQFP64 packaging - critical for BOM-stable industrial firmware development.
Technical Context
The STR755FV2T6 integrates an ARM7TDMI-S core with tightly coupled peripherals: its nested interrupt controller supports 32 vectors and 16 IRQ priorities, enabling low-latency response to CAN message objects, ADC conversion triggers, and PWM emergency-stop events. The SMI interface enables boot-from-external-serial-Flash, while the dual-bank Flash architecture isolates firmware (Bank 0) from runtime-configurable parameters (Bank 1).
Its clock system combines internal RC oscillators (5 MHz fast-start, 300 kHz RTC) with PLL-based scaling up to 60 MHz AHB/32 MHz APB, plus dedicated 48 MHz USB clock generation - all without external crystals beyond the required 4/8 MHz source. Low-power modes (STOP, STANDBY, WFI) retain register/SRAM state or preserve only RTC via V18_BKP, with wake-up via 15 dedicated lines or alarm timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM7TDMI-S 32-bit RISC CPU @ 60 MHz (54 DMIPS), Thumb instruction set compatible |
| Memory | 256 KB Flash (Bank 0), 16 KB RWW Flash (Bank 1), 16 KB SRAM - supports read-while-write for parameter updates without halting execution |
| ADC | 10-bit SAR converter with 11 external channels, 3.75 µs min conversion time, programmable watchdog and timer-triggered scan mode |
| PWM Timer | 16-bit 6-channel motor-control PWM with edge/center-aligned waveforms, configurable dead-time insertion, and emergency stop input |
| Communication | 1× CAN 2.0B (1 Mbit/s), 1× USB Full-Speed (12 Mb/s), 3× UART (LIN-capable, 2 Mbit/s), 2× SSP (SPI/SSI, up to 16 Mb/s), 1× I²C (400 kHz) |
| I/O & Timers | 38 GPIOs with atomic bit-set/reset, 3× synchronizable 16-bit timers (2 capture/2 compare each), 1× watchdog, 1× timebase timer, 1× 16-bit 6-ch PWM |
| Supply & Temp | Single 3.3V ±10% or 5V ±10%; operating ambient: –40°C to +85°C; junction max: +125°C |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO | Power supply inputs | Separate analog/digital/IO rails enable noise isolation; VDDIO supports 3.3V or 5V logic levels |
| VSS, VSSA, VSSIO | Ground returns | Dedicated analog/digital/IO ground pins minimize coupling between signal domains |
| OSC_IN / OSC_OUT | Crystal oscillator interface | Accepts 4 MHz or 8 MHz ceramic resonator/crystal; enables PLL lock and precise USB clock derivation |
| USB_DP / USB_DM | USB differential data pair | Full-speed (12 Mb/s) interface requiring 3.3V supply; internal pull-ups enabled via software |
| CAN_RX / CAN_TX | CAN physical layer interface | Direct connection to external transceiver; supports dominant/recessive signaling per ISO 11898-1 |
| PA0–PA15, PB0–PB15, PC0–PC7 | General-purpose I/O ports | 38 total GPIOs with remappable alternate functions (e.g., TIMx, UARTx, SSPx); atomic SET/RES registers prevent race conditions |
Key Features
| Feature | Design Value |
|---|---|
| Read-While-Write Flash | 16 KB Bank 1 enables firmware-safe storage of calibration data or configuration without halting CPU execution |
| Motor-Control PWM | 6-channel synchronized output with programmable dead-time prevents shoot-through in 3-phase inverter gate drivers |
| Hardware DMA | 4-channel controller with circular buffer support offloads UART/SSP/ADC/PWM transfers, freeing CPU for real-time control loops |
| Boot Flexibility | Five boot modes (internal Flash, external serial Flash, SRAM, bootloader) simplify field firmware recovery and secure update deployment |
| Low-Power RTC | Independent 32.768 kHz or internal RC clocking retains calendar/timekeeping during STOP mode with <1 µA consumption |
Applications
| Industrial Motor Drive | USB-Capable HMI Controller |
|---|---|
|
Use Scenario: Closed-loop control of brushless DC motors in HVAC blowers and pump inverters. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms using PWM timer synchronization, ADC sampling triggered by timer events, and CAN feedback from position sensors. Use Value: Deterministic 60 MHz ARM7 execution ensures sub-10 µs loop latency; dead-time insertion prevents power-stage short-circuits. |
Use Scenario: Human-machine interface in medical analyzers requiring local display, USB mass storage for log export, and CAN bus diagnostics. IC Role / Device Role / Timing Role: Dual-protocol bridge: USB handles host file transfer while CAN manages subsystem communication - both managed concurrently via nested interrupts. Use Value: Integrated USB+CAN eliminates external protocol bridges; 38 GPIOs support touch buttons, LED indicators, and sensor interfaces. |
| Programmable Logic Controller | Energy Metering Gateway |
|
Use Scenario: DIN-rail mounted PLC with digital I/O expansion, analog input conditioning, and Modbus over UART. IC Role / Device Role / Timing Role: Deterministic scan-cycle executor: ADC reads 11 analog channels in scan mode, GPIOs drive relay outputs, UART implements RTU/ASCII Modbus framing. Use Value: On-chip 16 KB SRAM buffers full Modbus transaction stack; hardware CRC acceleration optional via peripheral assist. |
Use Scenario: Smart electricity meter gateway aggregating pulse inputs, temperature sensing, and remote firmware updates via USB stick. IC Role / Device Role / Timing Role: Secure parameter management: RWW Flash stores tariff tables and calibration coefficients; RTC maintains billing timestamps across power cycles. Use Value: 20-year Flash data retention at 85°C ensures decade-long meter accuracy without battery-backed RAM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ARM7-based microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STR752FR2 | Same ARM7TDMI-S core, 128 KB Flash (Bank 0), 16 KB RWW Flash, 72 GPIOs in LQFP100, no USB | Higher I/O count and larger package; lacks USB but adds CAN-only capability in same voltage range | Select when board layout accommodates LQFP100 and USB is unnecessary but CAN + expanded I/O is required |
| STM32F103C8T6 | Cortex-M3 core, 64 KB Flash, 20 KB RAM, no CAN+USB coexistence in 48-pin package, no RWW Flash | Higher core efficiency (1.25 DMIPS/MHz), but lacks hardware motor PWM dead-time and dual-protocol concurrency in compact footprint | Select for cost-sensitive, non-motor applications where USB-only or CAN-only suffices and Cortex-M3 toolchain preference exists |
Compared with STR752FR2, STR755FV2T6 trades I/O count and package size for integrated USB+CAN coexistence and higher Flash density; versus STM32F103C8T6, it offers deterministic ARM7 timing, hardware dead-time, and RWW Flash - critical for certified industrial firmware updates.
Availability
STR755FV2T6 is available at Aetrix Electronics and suitable for industrial motor drives, USB-enabled HMIs, programmable logic controllers, and energy metering gateways requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for STR755FV2T6 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, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components.
The STR750 family was engineered for industrial real-time control applications demanding deterministic timing, dual-protocol connectivity (USB+CAN), and robust Flash reliability - targeting motor drives, PLCs, and smart grid infrastructure.
FAQ
Does STR755FV2T6 support simultaneous USB and CAN operation?
Yes - STR755FV2T6 supports concurrent USB Full-Speed (12 Mb/s) and CAN 2.0B (1 Mb/s) operation in LQFP64 packaging. Its dedicated 48 MHz USB clock is derived from the main PLL without external crystal dependency, and CAN TX/RX pins are electrically isolated from USB DP/DM. This enables real-time bridging between host PC (via USB) and fieldbus networks (via CAN), validated in ST's AN2837 reference design.
What is the maximum ADC sampling rate achievable with STR755FV2T6?
The STR755FV2T6 achieves a minimum conversion time of 3.75 µs per 10-bit sample, enabling up to 266.7 kSPS in continuous scan mode. This rate is sustained using timer-triggered conversions and DMA-accelerated data movement to SRAM - confirmed in Section 6.3.12 of the datasheet under "10-bit ADC characteristics" with VDD = 3.3V and fADC = 12 MHz.
Can the STR755FV2T6 operate from a 5V supply while using USB?
No - USB operation requires VDD within 3.3V ±10% (3.0–3.6V). When powered from 5V, the internal voltage regulator generates VCORE and VBACKUP, but the USB PHY is disabled per Section 6.3.11 of the datasheet. For 5V-system designs requiring USB, external level-shifting or supply partitioning (e.g., 3.3V USB rail) is mandatory.
How is Flash memory protected against unauthorized readout or overwrite?
STR755FV2T6 implements hardware-based Flash protection: Option Bytes configure read-out protection (Level 1 locks debug access and Flash read; Level 2 disables SWD/JTAG entirely), and write protection restricts erase/program operations to defined sectors. These settings persist through power cycles and require chip erase to reset - documented in the STR7 Flash Programming Reference Manual (PM0047), Section 4.3.
STR755FV2T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-LQFP
- Series:
- STR7
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM7®
- Core Size:
- 32-Bit Single-Core
- Speed:
- 60MHz
- Connectivity:
- I2C, SPI, SSI, SSP, UART/USART
- Peripherals:
- DMA, PWM, WDT
- Number of I/O:
- 72
- 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 16x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STR755FV2T6 FAQ
1.How can I place an order for STR755FV2T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STR755FV2T6 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 STR755FV2T6 reliable?
The price and inventory of STR755FV2T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STR755FV2T6 is usually 5 days.
3.What payment methods are accepted for STR755FV2T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STR755FV2T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STR755FV2T6?
STR755FV2T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STR755FV2T6 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 STR755FV2T6?
For technical support, including STR755FV2T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STR755FV2T6 requirements.
6.How does Aetrix verify that STR755FV2T6 is sourced from the original manufacturer or authorized distributors?
All STR755FV2T6 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 STR755FV2T6 meets industry standards.
7.What is the process for return or replacement of STR755FV2T6?
All STR755FV2T6 units undergo pre-shipment inspection (PSI). If there is an issue with STR755FV2T6, 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 STR755FV2T6 part is unused and in its original packaging.
Return procedure for STR755FV2T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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