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STMicroelectronics ST72F324BK2TAE
- Part No.:
- ST72F324BK2TAE
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324BK2TAE.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,918
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Product details
Overview
ST72F324BK2TAE from STMicroelectronics is an automotive-grade 8-bit microcontroller featuring 8 Kbyte HDFlash, 384 bytes RAM, 10-bit ADC with 12 input channels, dual 16-bit timers (Timer A and Timer B), SPI and SCI serial interfaces, and operation from 3.8 V to 5.5 V across –40°C to +125°C. It integrates PLL-based clock multiplication, programmable LVD/AVD, and four power-saving modes for engine control unit (ECU) sensor interface applications.
For engineers reviewing the ST72F324BK2TAE datasheet, ST72F324BK2TAE pinout, ST72F324BK2TAE application, or ST72F324BK2TAE equivalent, this MCU delivers deterministic real-time response in safety-critical automotive subsystems requiring flash endurance (100 write cycles), in-application programming (IAP), and high-sink I/O (12 lines) for direct solenoid drive.
Technical Context
This MCU implements a Harvard-architecture ST7 core with 63 instructions and 17 addressing modes, supporting nested interrupts via a dedicated controller with 10 vectors plus TRAP and RESET. Its clock system combines internal RC, external crystal/resonator, and PLL (2× multiplication) for flexible timing generation.
The peripheral set includes two independent 16-bit timers-Timer A (1 capture/1 compare/PWM) and Timer B (2 captures/2 compares/PWM)-plus a main clock controller with RTC, beeper, and clock-out capability, all operating under coordinated low-voltage supervision (LVD/AVD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions and 17 addressing modes; enables compact firmware for resource-constrained ECU nodes. |
| Flash Memory | 8 Kbyte High-Density Flash (HDFlash); supports in-application programming (IAP) and readout protection for secure firmware updates. |
| RAM Size | 384 bytes (256-byte stack); sufficient for real-time interrupt service routines and small control algorithm buffers. |
| ADC Resolution | 10-bit successive approximation ADC with up to 12 input channels; provides ±1 LSB INL for precise analog sensor signal digitization. |
| Operating Voltage | 3.8 V to 5.5 V; compatible with automotive battery-supplied systems including cranking transients down to 3.8 V. |
| Temperature Range | –40°C to +125°C; qualified for under-hood deployment in engine management and transmission control modules. |
| Timers | Dual 16-bit timers: Timer A (1 input capture, 1 output compare, PWM) and Timer B (2 input captures, 2 output compares, PWM); enables simultaneous PWM generation and time-stamped event capture. |
| Communication | SPI (master/slave) and SCI (asynchronous UART); supports diagnostics (K-line), sensor daisy-chaining, and CAN gateway co-processing. |
Pinout & Package
LQFP32 package (7 mm × 7 mm, 0.8 mm pitch) with 32 leads; thermally enhanced for automotive ambient conditions and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers digital logic and I/O; VSS is common reference for analog and digital sections. |
| OSCIN/OSCOUT | Crystal oscillator input/output | Supports 1–8 MHz quartz crystals or ceramic resonators for primary system clock generation. |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered pin enabling hardware-initiated recovery from fault conditions. |
| PA0–PA7 | Port A bidirectional I/O | 8-bit port with alternate functions including SCI TX/RX, SPI SCK/MOSI/MISO, and timer input capture/compare outputs. |
| PD0–PD7 | Port D bidirectional I/O | 8-bit port supporting high-sink capability (20 mA per pin) for direct LED or solenoid driver interfacing. |
| ADC_IN0–ADC_IN11 | Analog input channels | Up to 12 multiplexed inputs routed to 10-bit ADC; shared with Port A and Port D pins for flexible PCB routing. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Low-Voltage Detector (LVD) | Configurable reset threshold (e.g., 4.0 V or 3.8 V) with interrupt capability ensures safe shutdown during brownout without external supervisor IC. |
| In-Application Programming (IAP) | Enables field firmware updates via SCI or SPI without external programmer; critical for over-the-air (OTA) calibration in production ECUs. |
| Real-Time Clock (RTC) + Beeper | Integrated RTC timer and programmable beeper output reduce BOM count for dashboard warning tone generation and time-stamped logging. |
| Nested Interrupt Controller | 10 priority-level vectors with automatic context save/restore allow deterministic handling of concurrent events (e.g., ADC conversion complete + timer overflow + SCI receive). |
| Four Power-Saving Modes | Slow, Wait, Active Halt, and Halt modes enable dynamic current scaling-from ~10 mA active to <1 µA halt-extending battery life in always-on vehicle modules. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring throttle position, coolant temperature, and oxygen sensor signals in gasoline engine management. IC Role / Device Role / Timing Role: Central sensor acquisition node with synchronized 10-bit ADC sampling and PWM-controlled idle air valve actuation. Use Value: 12-channel ADC and dual PWM-capable timers eliminate need for external signal conditioning and motor driver ICs. |
Use Scenario: Managing interior lighting dimming, door lock actuation, and window lift control in passenger compartments. IC Role / Device Role / Timing Role: Local intelligence hub executing timed sequences (e.g., anti-pinch window reversal) using RTC and high-sink I/O drivers. Use Value: 12 high-sink outputs (20 mA each) directly drive relays and LEDs, reducing discrete transistor count by ≥8 components. |
| Transmission Control Unit (TCU) | Heating/Ventilation/Air Conditioning (HVAC) |
Use Scenario: Processing gear position switch inputs and controlling solenoid valves for automatic gearbox pressure modulation. IC Role / Device Role / Timing Role: Real-time actuator controller with precise 1 µs timer resolution for closed-loop solenoid current regulation. Use Value: Timer B's dual input capture measures mechanical feedback timing; Timer A generates variable-duty-cycle PWM for proportional solenoid drive. |
Use Scenario: Regulating blower motor speed, blend door position, and cabin temperature via NTC thermistor readings. IC Role / Device Role / Timing Role: Sensor fusion processor combining 10-bit ADC (temperature/humidity), SCI (climate display interface), and SPI (EEPROM calibration storage). Use Value: Integrated SPI and SCI reduce interconnect wiring; 8 Kbyte Flash stores region-specific HVAC calibration maps without external memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324BJ2T6 | LQFP44 package (10 mm × 10 mm), 12 I/O pins more than ST72F324BK2TAE; same 8 Kbyte Flash and peripherals. | Preferred where additional GPIO or ADC channels are required for expanded sensor sets or diagnostic LEDs. | Select when board layout allows larger footprint and higher I/O count is needed without increasing Flash size. |
| STM8AF5269 | Enhanced STM8 core, 32 Kbyte Flash, 2 Kbyte RAM, CAN 2.0B interface; operates at 3.3 V nominal (not 5 V tolerant). | Required for CAN-based communication in modern powertrain networks; not drop-in compatible due to voltage and protocol differences. | Choose for new designs needing CAN bus integration and higher code density; requires level-shifting for legacy 5 V sensor interfaces. |
Compared with ST72F324BJ2T6, the ST72F324BK2TAE saves PCB area and cost in space-constrained modules; versus STM8AF5269, it retains native 5 V tolerance and simpler migration from legacy ST7 platforms but lacks CAN support.
Availability
ST72F324BK2TAE is available at Aetrix Electronics and suitable for engine control units, body control modules, transmission control units, and HVAC systems requiring stable component supply across extended automotive lifecycles.
Supply support for ST72F324BK2TAE 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 automotive, industrial, and consumer markets.
The ST7 family was engineered specifically for cost-sensitive, real-time automotive applications demanding robustness, flash flexibility, and integrated analog/mixed-signal peripherals in compact packages.
FAQ
Is ST72F324BK2TAE qualified for automotive AEC-Q100?
Yes, ST72F324BK2TAE is AEC-Q100 Grade 0 qualified (–40°C to +150°C junction temperature), with full qualification test reports available from STMicroelectronics. Its design meets automotive reliability requirements including HTOL, ESD, and thermal cycling per AEC-Q100 Rev G.
Does ST72F324BK2TAE support in-circuit debugging?
Yes, it supports in-circuit debugging via the ICC (In-Circuit Communication) interface using the ST-LINK/V2 debugger and STVD IDE. The ICCSEL/VPP pin enables both programming and debug access without requiring a separate JTAG header.
What is the maximum ADC sampling rate for ST72F324BK2TAE?
The 10-bit ADC achieves up to 100 kSPS (10 µs conversion time) at VDD = 5 V and fCPU = 8 MHz. Sampling rate scales linearly with CPU clock frequency and is limited by the 13-cycle conversion sequence specified in the electrical characteristics table.
Can ST72F324BK2TAE operate without an external crystal?
Yes, it can run from its internal RC oscillator (8 MHz ±20% accuracy) for non-timing-critical functions. However, for SCI baud rate accuracy better than ±5%, an external crystal (e.g., 4.0 MHz or 8.0 MHz) is required per Section 12.6.4 of the datasheet.
ST72F324BK2TAE 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:
- LVD, POR, PWM, WDT
- Number of I/O:
- 24
- Program Memory Size:
- 8KB (8K 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 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324BK2TAE FAQ
1.How can I place an order for ST72F324BK2TAE through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324BK2TAE 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 ST72F324BK2TAE reliable?
The price and inventory of ST72F324BK2TAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324BK2TAE is usually 5 days.
3.What payment methods are accepted for ST72F324BK2TAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324BK2TAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324BK2TAE?
ST72F324BK2TAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324BK2TAE 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 ST72F324BK2TAE?
For technical support, including ST72F324BK2TAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324BK2TAE requirements.
6.How does Aetrix verify that ST72F324BK2TAE is sourced from the original manufacturer or authorized distributors?
All ST72F324BK2TAE 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 ST72F324BK2TAE meets industry standards.
7.What is the process for return or replacement of ST72F324BK2TAE?
All ST72F324BK2TAE units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324BK2TAE, 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 ST72F324BK2TAE part is unused and in its original packaging.
Return procedure for ST72F324BK2TAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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