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STMicroelectronics ST72F324BK2T6TR
- Part No.:
- ST72F324BK2T6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324BK2T6TR.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,432
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Product details
Overview
ST72F324BK2T6TR 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 interfaces, and enhanced low-voltage supervision (LVD/AVD) for engine control units and body electronics systems operating from 3.8 V to 5.5 V across –40°C to +125°C.
For engineers reviewing the ST72F324BK2T6TR datasheet, ST72F324BK2T6TR pinout, ST72F324BK2T6TR application, or ST72F324BK2T6TR equivalent, this MCU delivers deterministic real-time control with nested interrupts, in-application programming capability, and four power-saving modes-critical for ECU firmware validation, CAN gateway logic, and sensor interface design in harsh automotive environments.
Technical Context
The ST72F324BK2T6TR implements a Harvard-architecture 8-bit CPU with 63 instructions and 17 addressing modes, including 8×8 unsigned multiply. Its clock system integrates a programmable PLL (2× multiplication), internal RC oscillator, crystal/ceramic resonator support, and external clock input-enabling flexible timing configuration for synchronous peripheral operation.
Interrupt handling uses a nested controller with 10 vectors plus TRAP and RESET, supporting up to 9 external interrupt lines mapped across 4 vectors. The device includes dedicated peripherals: MCC/RTC with beeper and clock-out, configurable watchdog timer, and dual 16-bit timers supporting PWM, input capture, output compare, and pulse generation-each with independent interrupt capability and low-power mode retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions and 17 addressing modes; enables compact firmware and deterministic interrupt latency. |
| Flash Memory | 8 Kbyte High-Density Flash with readout protection; supports in-circuit and in-application programming for field updates. |
| RAM Size | 384 bytes (256-byte stack); sufficient for real-time task stacks and small data buffers in automotive sensor nodes. |
| ADC Resolution | 10-bit SAR ADC with up to 12 input channels; provides 1 LSB INL/DNL accuracy for throttle position or temperature sensing. |
| Timers | Dual 16-bit timers: Timer A (1 capture/1 compare) and Timer B (2 capture/2 compare); enable precise PWM motor control and encoder counting. |
| Communication | SPI (master/slave) and SCI (asynchronous UART); supports diagnostics via K-line and daisy-chained sensor networks. |
| Operating Voltage | 3.8 V to 5.5 V; compatible with automotive battery transients and regulated 5 V domains without external LDO. |
| Temperature Range | –40°C to +125°C; qualified per AEC-Q100 Grade 2 for under-hood engine management applications. |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch) with 24 multifunctional I/O lines, 17 alternate function pins, and 10 high-sink outputs (20 mA typical). Pin assignments include dedicated reset, ICCSEL/VPP, AVDD/AVSS, and timer/ADC/SPI/SCI signal routing optimized for ECU PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Separate analog/digital domains; AVDD/AVSS pins decoupled for 10-bit ADC noise immunity. |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered; initiates full hardware reset on power-up or brownout recovery. |
| ICCSEL/VPP | In-circuit programming control | Selects ICC mode during programming; doubles as high-voltage programming enable (VPP). |
| PA0–PA7 | Port A bidirectional I/O | Configurable as ADC inputs (PA0–PA7), timer channels, or SCI TX/RX; supports external interrupt on change. |
| PB0–PB7 | Port B bidirectional I/O | Supports SPI (PB0–PB3), timer outputs (PB4–PB5), and general-purpose I/O with high sink (20 mA). |
Key Features
| Feature | Design Value |
|---|---|
| Nested interrupt controller | 10 vector priority levels with software-selectable masking; ensures timely response to critical events like overtemperature or CAN error frames. |
| Enhanced LVD/AVD | Programmable reset thresholds (2.7 V/3.0 V/3.3 V/3.6 V) and auxiliary voltage detector with interrupt; enables early warning of supply degradation before reset. |
| Four power-saving modes | Slow, Wait, Active Halt, and Halt; reduces current to <1 µA in Halt mode while retaining RAM and register state for fast wake-up from external interrupt. |
| Real-time clock & beeper | MCC/RTC module with programmable prescaler and integrated beeper driver; eliminates need for external timing IC in dashboard alert systems. |
| HDFlash endurance | 100 program/erase cycles with 20-year data retention; validated for reprogramming during vehicle service life. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and coolant temperature in gasoline direct injection systems. IC Role / Device Role / Timing Role: Primary control MCU executing closed-loop fuel injection timing and spark advance algorithms at 10 kHz loop rate. Use Value: Deterministic 8-bit execution and dual 16-bit timers ensure sub-microsecond jitter in ignition pulse generation under load. |
Use Scenario: Centralized management of door locks, window lifters, interior lighting, and mirror controls in premium vehicles. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slaves and driving high-current loads via external drivers. Use Value: 10 high-sink I/O pins directly drive solenoids and relays; LVD/AVD prevents erratic behavior during battery voltage sag. |
| Instrument Cluster | Heating/Ventilation Control |
Use Scenario: Driving analog gauges, LED indicators, and audible alerts in digital dashboards with CAN bus integration. IC Role / Device Role / Timing Role: Display controller with MCC/RTC-based beeper and SPI-driven segment drivers. Use Value: Integrated beeper and clock-out eliminate external audio components; SPI enables efficient multiplexed display refresh. |
Use Scenario: Closed-loop regulation of HVAC blower speed, blend door actuation, and cabin temperature feedback. IC Role / Device Role / Timing Role: Sensor fusion node aggregating NTC thermistor readings and PWM-controlled DC motor signals. Use Value: 12-channel 10-bit ADC resolves 0.1°C temperature steps; Timer B PWM output drives motor at 20 kHz with minimal EMI. |
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 |
|---|---|---|---|
| ST72F324BJ2T6TR | LQFP44 package (44-pin), same 8 Kbyte Flash/RAM specs, adds 8 additional I/O and 2 extra ADC channels. | Required when board layout needs more GPIOs or analog inputs (e.g., multi-zone climate control). | Select if pin count and peripheral expansion outweigh footprint constraints. |
| STM8AF5269TAY | STM8 core, 32 Kbyte Flash, 2 Kbyte RAM, higher performance, extended temp range (–40°C to +150°C), but no native beeper or MCC/RTC. | Better suited for next-gen ECUs requiring larger code space and higher ambient tolerance. | Choose for migration paths where legacy ST7 firmware porting effort is acceptable. |
Compared with ST72F324BK2T6TR, the ST72F324BJ2T6TR offers pin-compatible scalability in larger packages, while the STM8AF5269TAY trades integrated peripherals for raw compute headroom and extended thermal robustness-making the ST72F324BK2T6TR optimal for cost-sensitive, space-constrained automotive modules needing beeper and RTC functionality.
Availability
ST72F324BK2T6TR is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and HVAC controllers requiring stable component supply across automotive production lifecycles.
Supply support for ST72F324BK2T6TR 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-effective, high-reliability automotive embedded control-emphasizing robustness against voltage transients, wide temperature operation, and integrated safety features like LVD and AVD.
FAQ
Is ST72F324BK2T6TR pin-compatible with other ST72324B variants?
Yes-ST72F324BK2T6TR shares identical pinout with all ST72324BKx-Auto variants in LQFP32 (7×7 mm) package, including ST72F324BK4T6TR and ST72F324BK6T6TR. Only Flash size (8/16/32 Kbyte) and RAM differ; no PCB redesign is needed when upgrading within the K-series LQFP32 footprint.
Does ST72F324BK2T6TR support CAN communication natively?
No-ST72F324BK2T6TR does not integrate a CAN controller or physical layer. It supports SCI (UART) and SPI interfaces only. CAN functionality requires external CAN transceivers (e.g., TJA1042) connected via SCI for protocol handling or SPI-connected CAN controllers (e.g., MCP2515) for offload.
What programming interfaces does ST72F324BK2T6TR support?
It supports In-Circuit Programming (ICP) via ICC interface using the ICCSEL/VPP pin and standard SWIM (Single Wire Interface Module) protocol. No JTAG is present. Programming requires ST's STVP or third-party tools compliant with ST7 ICC specification, operating at VDD = 3.8–5.5 V.
How is the 10-bit ADC calibrated for production use?
The ADC includes factory-trimmed offset/gain calibration stored in option bytes. Users must execute the "ADC Calibration" routine (described in Section 10.6.3 of Doc ID13466) after power-on or reset to load these values into calibration registers-ensuring ±1 LSB INL/DNL across temperature without external reference trimming.
ST72F324BK2T6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- ST7
- Packaging:
- Tape & Reel (TR)
- 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:
ST72F324BK2T6TR FAQ
1.How can I place an order for ST72F324BK2T6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324BK2T6TR 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 ST72F324BK2T6TR reliable?
The price and inventory of ST72F324BK2T6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324BK2T6TR is usually 5 days.
3.What payment methods are accepted for ST72F324BK2T6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324BK2T6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324BK2T6TR?
ST72F324BK2T6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324BK2T6TR 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 ST72F324BK2T6TR?
For technical support, including ST72F324BK2T6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324BK2T6TR requirements.
6.How does Aetrix verify that ST72F324BK2T6TR is sourced from the original manufacturer or authorized distributors?
All ST72F324BK2T6TR 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 ST72F324BK2T6TR meets industry standards.
7.What is the process for return or replacement of ST72F324BK2T6TR?
All ST72F324BK2T6TR units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324BK2T6TR, 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 ST72F324BK2T6TR part is unused and in its original packaging.
Return procedure for ST72F324BK2T6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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