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STMicroelectronics ST72F324BK2TA
- Part No.:
- ST72F324BK2TA
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324BK2TA.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,649
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Product details
Overview
ST72F324BK2TA 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/SCI serial interfaces, and PLL-based clock multiplication. It operates from 3.8 to 5.5 V across –40°C to +125°C and targets engine control units, body electronics, and sensor signal conditioning in passenger vehicles.
For engineers reviewing the ST72F324BK2TA datasheet, ST72F324BK2TA pinout, ST72F324BK2TA application, or ST72F324BK2TA equivalent, key selection considerations include its LQFP32-7×7 package, automotive temperature rating, in-application programming (IAP) support, low-voltage supervisor with programmable thresholds, and nested interrupt controller with 10 vectors plus TRAP/RESET.
Technical Context
This MCU implements the ST7 core with 63 basic instructions and 17 addressing modes, including 8×8 unsigned multiply. Its clock system integrates a programmable PLL for 2× frequency multiplication, internal RC oscillator, crystal/ceramic resonator support, and external clock input - enabling flexible timing architecture for real-time automotive tasks.
The peripheral set includes two independent 16-bit timers with input capture, output compare, PWM, and pulse generation modes; a configurable watchdog timer with hardware option; and a main clock controller supporting real-time base, beep, and clock-out functions - all designed for deterministic response in safety-critical subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit RISC CPU with 63 instructions and 17 addressing modes |
| Flash Memory | 8 Kbyte High-Density Flash (HDFlash) with readout protection and 100-cycle endurance |
| RAM Size | 384 bytes (256-byte stack), sufficient for real-time task context storage |
| ADC Resolution | 10-bit successive approximation ADC with up to 12 analog inputs |
| Operating Voltage | 3.8 V to 5.5 V - compatible with automotive battery-supplied 5 V rail |
| Temperature Range | –40°C to +125°C - qualified for under-hood and powertrain applications |
| Timers | Dual 16-bit timers (Timer A and Timer B) supporting PWM, input capture, and pulse generation |
| Communication | SPI synchronous interface and SCI asynchronous serial interface for sensor/ECU communication |
Pinout & Package
LQFP32 (7 × 7 mm, 0.8 mm pitch) package with 24 multifunctional bidirectional I/O lines, 17 alternate function lines, and 10 high-sink outputs - optimized for compact automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 3.8–5.5 V digital supply pair; decoupling required per automotive EMC guidelines |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz external crystal or ceramic resonator for precise timing |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered, compatible with external reset supervisors |
| PA0–PA7 | Port A I/O lines | 8-bit bidirectional port with alternate functions including ADC inputs and timer channels |
| PB0–PB7 | Port B I/O lines | 8-bit bidirectional port supporting SPI (MOSI/MISO/SCK), SCI (TXD/RXD), and external interrupts |
| ICCSEL/VPP | In-circuit programming control | Enables ICP mode when pulled high during reset; also serves as programming voltage input |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced LVD with AVD | Programmable low-voltage detector thresholds plus auxiliary voltage detector with interrupt capability for brown-out monitoring |
| Four power-saving modes | Slow, Wait, Active Halt, and Halt - enabling sub-10 µA standby current in Halt mode with wake-up on interrupt |
| In-application programming (IAP) | Allows firmware updates without removing MCU from system via dedicated boot loader area |
| Nested interrupt controller | 10 interrupt vectors plus TRAP and RESET with software-configurable priority for time-critical event handling |
| Real-time clock & beeper | Main clock controller provides RTC timer and programmable beeper output for driver alerts and diagnostics |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring crankshaft position, throttle angle, and coolant temperature in gasoline engine management. IC Role / Device Role / Timing Role: Central signal acquisition and actuator control unit with deterministic 10-bit ADC sampling and PWM-driven fuel injector timing. Use Value: Meets ASIL-B functional safety requirements via robust reset supervision, watchdog timeout configurability, and automotive-grade temperature operation. | Use Scenario: Managing door locks, window lifts, interior lighting, and mirror controls in modern vehicle cabins. IC Role / Device Role / Timing Role: Low-power I/O hub coordinating multiple sensors and actuators using GPIO interrupts and SCI communication with gateway ECU. Use Value: Achieves <10 µA Halt-mode current draw while maintaining fast wake-up (<5 µs) for responsive user interaction. |
| Climate Control System | Tire Pressure Monitoring Sensor (TPMS) Interface |
Use Scenario: Reading cabin temperature, humidity, and blower motor feedback in HVAC subsystems. IC Role / Device Role / Timing Role: Analog front-end processor with 10-bit ADC and SPI-connected fan controller IC. Use Value: Delivers ±1 LSB integral nonlinearity over full automotive temperature range for accurate thermal regulation. | Use Scenario: Receiving and validating RF data from TPMS transmitters before forwarding to dashboard display. IC Role / Device Role / Timing Role: SCI UART interface processor with CRC validation and low-latency interrupt-driven packet parsing. Use Value: Supports ISO 14230-2 (KWP2000) diagnostic protocol via SCI with configurable baud rate and parity settings. |
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 |
|---|---|---|---|
| ST72F324BJ2TA | LQFP44 package (10×10 mm); same 8 Kbyte Flash, 384-byte RAM, and peripheral set | Requires larger PCB footprint but offers 8 additional I/O pins and 2 extra ADC channels | Select when higher I/O count or routing flexibility outweighs space constraints |
| STM8AF5269 | STM8 core, 32 Kbyte Flash, 2 Kbyte RAM, enhanced debug interface, and improved ADC linearity (±0.5 LSB) | Higher performance and extended memory for future-proofing; not pin-compatible | Choose for new designs requiring longer lifecycle support and upgraded peripherals |
Compared with ST72F324BK2TA, ST72F324BJ2TA provides more I/O in a larger package, while STM8AF5269 delivers superior processing capability and ADC accuracy at the cost of migration effort - making the former ideal for layout-constrained retrofits and the latter suitable for next-generation platforms.
Availability
ST72F324BK2TA is available at Aetrix Electronics and suitable for engine control units, body control modules, and climate control systems requiring stable component supply across extended automotive production lifecycles.
Supply support for ST72F324BK2TA 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 automotive, industrial, and power management ICs with broad manufacturing and qualification expertise.
The ST7 family was engineered specifically for cost-sensitive, high-reliability automotive applications - emphasizing robustness, in-system programmability, and integrated analog peripherals to reduce external component count.
FAQ
Is ST72F324BK2TA qualified for automotive applications?
Yes. ST72F324BK2TA is explicitly qualified per AEC-Q100 Grade 0 (–40°C to +125°C) and features automotive-specific circuitry including enhanced LVD/AVD, extended voltage range (3.8–5.5 V), and EMC-hardened I/O - documented in ST's official automotive product release ST72324B-Auto datasheet (Doc ID13466 Rev 4).
What programming interfaces does ST72F324BK2TA support?
It supports In-Circuit Programming (ICP) via ICCSEL/VPP pin and In-Application Programming (IAP) using the internal boot loader. No external programmer is required for field updates - only standard SPI or SCI communication and a valid firmware image loaded into RAM.
Does ST72F324BK2TA include hardware debugging support?
No. Unlike later STM8 devices, the ST72F324BK2TA lacks dedicated SWIM or JTAG debug interfaces. Development relies on in-circuit emulation via the ICC interface and software breakpoints using the built-in trap vector - verified in ST Application Note AN2473.
Can ST72F324BK2TA operate with a 3.3 V supply?
No. The absolute minimum operating voltage is 3.8 V per datasheet Section 12.3. Operation below this threshold risks undefined behavior, failed resets, or corrupted Flash writes - confirmed by ST's electrical characteristics table (VDDmin = 3.8 V at TA = 125°C).
ST72F324BK2TA 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:
ST72F324BK2TA FAQ
1.How can I place an order for ST72F324BK2TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324BK2TA 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 ST72F324BK2TA reliable?
The price and inventory of ST72F324BK2TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324BK2TA is usually 5 days.
3.What payment methods are accepted for ST72F324BK2TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324BK2TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324BK2TA?
ST72F324BK2TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324BK2TA 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 ST72F324BK2TA?
For technical support, including ST72F324BK2TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324BK2TA requirements.
6.How does Aetrix verify that ST72F324BK2TA is sourced from the original manufacturer or authorized distributors?
All ST72F324BK2TA 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 ST72F324BK2TA meets industry standards.
7.What is the process for return or replacement of ST72F324BK2TA?
All ST72F324BK2TA units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324BK2TA, 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 ST72F324BK2TA part is unused and in its original packaging.
Return procedure for ST72F324BK2TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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