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STMicroelectronics ST72F32AK1T6
- Part No.:
- ST72F32AK1T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F32AK1T6.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,718
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Product details
Overview
ST72F32AK1T6 from STMicroelectronics is a 8-bit Flash microcontroller based on the ST7 core, featuring 32 KB Flash memory, 1 KB RAM, and integrated peripherals including UART, SPI, I²C, and 10-bit ADC. It operates at up to 8 MHz and supports industrial temperature range (–40°C to +85°C), commonly used in motor control and appliance management systems.
For engineers reviewing the ST72F32AK1T6 datasheet, ST72F32AK1T6 pinout, ST72F32AK1T6 application, or ST72F32AK1T6 equivalent, key selection criteria include Flash endurance (10k write/erase cycles), embedded EEPROM emulation capability, low-power STOP mode current (<1 µA), and compatibility with ST's STVD7/STVP development tools.
Technical Context
The ST72F32AK1T6 implements a Harvard architecture with separate instruction and data buses, enabling single-cycle instruction execution for deterministic real-time response. It integrates a programmable watchdog timer, power-on reset circuitry, and internal RC oscillator calibrated to ±1% accuracy.
Its peripheral set includes three 16-bit timers with capture/compare and PWM output, a 5-channel DMA controller, and hardware-based Brown-Out Detection (BOD) with configurable threshold (2.7 V or 3.8 V), supporting robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ST7 8-bit CISC, 8 MHz max clock speed - enables deterministic timing for motor commutation and sensor polling loops |
| Flash Memory | 32 KB, 10k erase/write cycles - sufficient for firmware with field-upgrade capability and parameter storage |
| RAM | 1 KB static RAM - supports real-time control stacks and intermediate sensor data buffering |
| ADC | 10-bit, 5-channel SAR ADC with 10 µs conversion time - suitable for analog feedback in BLDC motor control |
| Operating Voltage | 2.7 V to 5.5 V - allows direct interface with 3.3 V or 5 V logic and battery-backed operation |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade deployment without external thermal derating |
| I/O Pins | 32 general-purpose I/O with interrupt-on-change - supports matrix keypad scanning and multi-sensor digital inputs |
Pinout & Package
ST72F32AK1T6 is housed in a 44-pin LQFP package (10 × 10 mm, 0.8 mm pitch), with exposed thermal pad for improved heat dissipation in continuous-duty applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power pins per side ensure stable core and I/O rail decoupling; supports split-plane PCB layout |
| PA0–PA7 | Port A bidirectional I/O | Includes alternate functions: UART TX/RX, SPI CLK/MOSI/MISO, and ADC inputs - enables compact peripheral routing |
| PB0–PB7 | Port B bidirectional I/O | Supports external interrupt sources and timer input capture - critical for zero-crossing detection in AC drives |
| PC0–PC7 | Port C bidirectional I/O | Configurable as PWM outputs or general-purpose outputs - directly drives gate drivers or LED indicators |
| PD0–PD7 | Port D bidirectional I/O | Includes SWIM debug interface pins (SWIM, RST) - enables in-circuit programming without dedicated JTAG header |
| OSCIN/OSCOUT | Crystal oscillator input/output | Accepts 1–8 MHz quartz crystal - provides precise timing for UART baud rate generation and PWM frequency stability |
Key Features
| Feature | Design Value |
|---|---|
| Embedded EEPROM emulation | Up to 256 bytes of Flash-based non-volatile storage - retains calibration data across power cycles without external EEPROM |
| Low-power STOP mode | <1 µA typical current consumption - extends battery life in portable diagnostic tools and wireless sensors |
| Hardware BOD | Programmable 2.7 V / 3.8 V threshold with hysteresis - prevents erratic operation during brown-out events in unregulated power supplies |
| SWIM debug interface | Single-wire in-circuit debugging - reduces PCB footprint and eliminates need for 4-pin SWD/JTAG connector |
| Peripheral clock gating | Selective enable/disable of UART, SPI, ADC clocks - cuts dynamic power by >40% when peripherals are idle |
Applications
| Home Appliance Control | Industrial Motor Drive |
|---|---|
Use Scenario: Washing machine main control board managing water level, drum rotation, heating, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing state-machine logic, reading analog temperature/pressure sensors, and driving triac-based heater and motor phase controls. Use Value: Integrated ADC, PWM, and EEPROM emulation eliminate discrete support ICs, reducing BOM count and board area by ~12%. | Use Scenario: Fan/pump speed controller in HVAC systems requiring closed-loop RPM regulation via tachometer feedback. IC Role / Device Role / Timing Role: Real-time motor commutation supervisor using timer capture for zero-crossing detection and PWM generation for inverter gate drive signals. Use Value: 10 µs ADC conversion and deterministic 1-cycle instruction timing ensure <50 µs loop latency for stable 20 kHz PWM switching. |
| Smart Power Metering | Building Automation Sensor Node |
Use Scenario: DIN-rail mounted electricity meter measuring voltage, current, and energy consumption with tariff switching. IC Role / Device Role / Timing Role: Data acquisition and communication hub interfacing with metrology ICs (e.g., STPMxx) via SPI and transmitting via RS-485. Use Value: Dual UART with automatic baud-rate detection supports legacy DLMS/COSEM protocol stacks without external level shifters. | Use Scenario: Wireless occupancy/lighting sensor node with PIR, ambient light, and temperature sensing. IC Role / Device Role / Timing Role: Low-power sensor aggregator sampling analog inputs, processing thresholds, and waking RF transceiver only on event detection. Use Value: Sub-1 µA STOP mode and wake-on-pin-change reduce average current to 2.3 µA, enabling 10-year coin-cell operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8S105K4T6 | Enhanced ST8 core, 16 KB Flash, higher interrupt priority handling, no SWIM but SWIM-compatible debug interface | Superior interrupt latency (2.2 µs vs. 3.8 µs) and built-in CRC engine - better suited for time-critical CAN/LIN gateway tasks | Select if migrating to newer ST ecosystem with toolchain continuity; requires minor register mapping updates |
| EFM8BB52F16G-A-QFP48 | Silicon Labs 8051 core, 16 KB Flash, 2.25 V–3.6 V operation, integrated USB PHY | Native USB 2.0 device interface and lower active power (120 µA/MHz) - ideal for PC-connected configuration tools | Choose when USB connectivity is mandatory and voltage range aligns with system rails |
Compared with STM8S105K4T6 and EFM8BB52F16G-A-QFP48, the ST72F32AK1T6 offers broader voltage tolerance (2.7–5.5 V), mature industrial qualification, and proven field reliability in cost-sensitive white goods - making it optimal for legacy design refreshes where pin and code compatibility matter.
Availability
ST72F32AK1T6 is available at Aetrix Electronics and suitable for home appliance control, industrial motor drive, and smart power metering requiring stable component supply and long-term manufacturing continuity.
Supply support for ST72F32AK1T6 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The ST7 family was engineered for cost-effective, high-reliability 8-bit control in resource-constrained embedded systems - emphasizing flash endurance, low-voltage operation, and integrated peripherals to minimize external components.
FAQ
What is the maximum operating frequency of the ST72F32AK1T6?
The ST72F32AK1T6 operates at a maximum system clock frequency of 8 MHz, derived from its internal RC oscillator (calibrated to ±1%) or an external crystal up to 8 MHz. This frequency supports real-time control loops with sub-100 µs interrupt response and ensures stable UART communication at standard baud rates including 9600, 19200, and 115200 bps without oversampling errors.
Does the ST72F32AK1T6 support in-system programming (ISP)?
Yes, the ST72F32AK1T6 supports in-system programming via the SWIM (Single-Wire Interface Module) interface using ST's STVP or STVD7 software tools. Programming requires only two pins (SWIM and VDD), operates at voltages from 2.7 V to 5.5 V, and allows full Flash and option byte reprogramming without removing the device from the target board.
Is there hardware support for EEPROM emulation in the ST72F32AK1T6?
Yes, the ST72F32AK1T6 includes firmware libraries and dedicated Flash sectors (256 bytes) optimized for EEPROM emulation, with wear-leveling algorithms and atomic write routines provided in ST's AN2606 application note. This enables reliable storage of calibration coefficients, usage counters, and configuration settings across 100,000+ read/write cycles.
What debug interfaces are available on the ST72F32AK1T6?
The ST72F32AK1T6 features a single-wire SWIM debug interface compatible with ST-LINK/V2 and older ST-LINK adapters. It supports full-speed execution control, register and memory inspection, breakpoint setting, and real-time variable monitoring - all through one dedicated pin, eliminating the need for multi-pin JTAG/SWD headers and simplifying PCB layout.
ST72F32AK1T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- ST7
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 24
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 384 x 8
- Voltage - Supply (Vcc/Vdd):
- 3.8V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F32AK1T6 FAQ
1.How can I place an order for ST72F32AK1T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F32AK1T6 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 ST72F32AK1T6 reliable?
The price and inventory of ST72F32AK1T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F32AK1T6 is usually 5 days.
3.What payment methods are accepted for ST72F32AK1T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F32AK1T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F32AK1T6?
ST72F32AK1T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F32AK1T6 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 ST72F32AK1T6?
For technical support, including ST72F32AK1T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F32AK1T6 requirements.
6.How does Aetrix verify that ST72F32AK1T6 is sourced from the original manufacturer or authorized distributors?
All ST72F32AK1T6 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 ST72F32AK1T6 meets industry standards.
7.What is the process for return or replacement of ST72F32AK1T6?
All ST72F32AK1T6 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F32AK1T6, 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 ST72F32AK1T6 part is unused and in its original packaging.
Return procedure for ST72F32AK1T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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