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STMicroelectronics STM8AF6226TASSSY
- Part No.:
- STM8AF6226TASSSY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6226TASSSY.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,479
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Product details
Overview
STM8AF6226TASSSY from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 8 Kbyte Flash memory with 20-year data retention at 55 °C, 640 byte true data EEPROM (300 kcycle endurance), and integrated 10-bit ADC with 7 muxed channels. It supports LIN 2.2, SPI (up to 8 Mbit/s), and I²C (up to 400 Kbit/s), and operates across -40 to 150 °C for engine control unit (ECU) sensor interface applications.
For engineers reviewing the STM8AF6226TASSSY datasheet, STM8AF6226TASSSY pinout, STM8AF6226TASSSY application, or STM8AF6226TASSSY equivalent, key selection criteria include automotive temperature grade (150 °C), LINUART compliance, high-sink I/O capability (21 pins), embedded EEPROM endurance, and dual RC oscillator trimming for clock stability in harsh environments.
Technical Context
The STM8AF6226 implements a Harvard-architecture STM8A core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution in safety-critical automotive subsystems. Its clock system integrates user-trimmable 16 MHz and 128 kHz RC oscillators plus crystal/resonator support, all monitored by a dedicated clock security system.
Interrupt handling uses a nested controller supporting 32 vectors and up to 28 external interrupts on 7 vectors, while peripheral timing relies on three independent timers: TIM1 (16-bit advanced control with dead-time insertion), TIM5 (16-bit general purpose), and TIM6 (8-bit basic timer with prescaler).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline and extended instruction set for deterministic automotive control loops. |
| Max CPU Frequency | 16 MHz at VDD = 3.3–5.5 V; enables real-time response in ECU timing-critical tasks like fuel injection sequencing. |
| Flash Memory | 8 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle - suitable for long-life vehicle platforms. |
| Data EEPROM | 640 byte true data EEPROM rated for 300 kwrite cycles - supports robust calibration storage and fault logging. |
| ADC Resolution | 10-bit SAR ADC with ±1 LSB INL, 7 muxed input channels + 1 internal reference channel - meets ASIL-B sensor signal acquisition needs. |
| Operating Temperature | -40 to +150 °C ambient range - validated for under-hood placement in powertrain and transmission control modules. |
| Communication Interfaces | LINUART (LIN 2.2 compliant, master/slave), SPI (fMASTER/2 or 8 Mbit/s), I²C (400 Kbit/s Fast Mode) - enables multi-protocol vehicle network integration. |
| I/O Capability | Up to 28 I/Os in LQFP32 package, including 21 high-sink outputs (20 mA sink per pin) - drives solenoids, LEDs, and discrete loads directly. |
Pinout & Package
LQFP32 (7 × 7 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant, automotive-grade molding compound rated for 150 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure low-noise analog/digital separation and stable operation under load transients. |
| PA0–PA7 | Port A I/O bank | 8-bit bidirectional port with high-sink capability (20 mA); PA3/PA4 configurable as LINUART TX/RX. |
| PB0–PB7 | Port B I/O bank | 8-bit bidirectional port; PB5/PB6 support SPI SCK/MOSI; PB7 supports I²C SCL. |
| PC0–PC7 | Port C I/O bank | 8-bit bidirectional port; PC0–PC6 map to ADC inputs; PC7 supports I²C SDA. |
| PD0–PD7 | Port D I/O bank | 8-bit bidirectional port; PD0–PD3 support TIM1 complementary outputs; PD4–PD7 support TIM5 capture/compare. |
| NRST | Active-low reset input | Schmitt-triggered, debounced input with programmable reset threshold - immune to board-level noise in automotive harnesses. |
| SWIM | Single-wire interface module | On-chip debug interface using single pin for programming and real-time debugging without halting CPU operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for 150 °C operation and automotive stress testing - eliminates need for external qualification in Tier-1 designs. |
| Embedded data EEPROM | 640 byte true EEPROM with 300 kcycle endurance - enables field-updatable calibration tables without external nonvolatile memory. |
| Advanced control timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and hardware dead-time insertion - supports 3-phase motor gate drive without external logic. |
| LIN 2.2 compliant UART | Hardware LIN framing, automatic resynchronization, and slave/master mode - reduces firmware overhead in body electronics networks. |
| Robust I/O design | Immunity to current injection per ISO 10605; 21 pins rated for 20 mA sink - simplifies interface to high-side switches and indicator loads. |
| Low-power modes | Wait, auto-wakeup, and Halt modes with user-definable clock gating - achieves sub-1 µA standby current for battery-sensitive modules. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and coolant temperature via analog and digital sensors. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop fuel injection and ignition timing algorithms with sub-millisecond jitter tolerance. Use Value: Integrated 10-bit ADC with analog watchdog and 150 °C rating enable direct sensor interfacing without external signal conditioning. |
Use Scenario: Gear selection logic, solenoid driver control, and CAN/LIN gateway functions in automatic transmission assemblies. IC Role / Device Role / Timing Role: Local controller managing hydraulic valve timing and communicating status over LIN to central body domain controller. Use Value: High-sink I/Os (20 mA) directly drive transmission solenoids; LINUART hardware offloads protocol handling from main application code. |
| Body Control Module (BCM) | Electric Power Steering (EPS) |
Use Scenario: Centralized management of door locks, window lifts, lighting, and HVAC fan speed in entry-level vehicles. IC Role / Device Role / Timing Role: Low-cost, high-integration MCU handling multiple PWM outputs, LIN slave communication, and EEPROM-based user preference storage. Use Value: 640-byte data EEPROM stores seat/mirror positions and lighting profiles; 8 Kbyte Flash accommodates feature-rich firmware updates. |
Use Scenario: Torque assist calculation and motor phase control in column-assist EPS systems operating near engine heat sources. IC Role / Device Role / Timing Role: Safety-relevant controller implementing ASIL-B torque path with redundant ADC sampling and watchdog supervision. Use Value: Independent and window watchdog timers plus clock security system meet ISO 26262 diagnostic coverage requirements for steering assist. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AF6223TASSY | 4 Kbyte Flash, 384 byte EEPROM, identical peripherals and package - lower memory density. | Suitable for simpler BCM or lighting modules where firmware footprint < 4 Kbyte and calibration storage < 384 byte. | Select when cost sensitivity outweighs future firmware scalability; shares same pinout and toolchain. |
| RL78/F13-BS | Renesas RL78 core, 16 Kbyte Flash, 1 Kbyte RAM, no embedded EEPROM - requires external NV memory for calibration. | Targeted at higher-performance body electronics with complex diagnostics and OTA update requirements. | Choose for longer-term roadmap alignment with Renesas' RL78 automotive platform; not pin-compatible. |
Compared with STM8AF6223TASSY, the STM8AF6226TASSSY provides double Flash and EEPROM capacity for enhanced feature sets and field calibration depth; versus RL78/F13-BS, it offers integrated EEPROM and lower BOM cost but less RAM and no built-in OTA stack support.
Availability
STM8AF6226TASSSY is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and electric power steering systems requiring stable component supply across extended automotive lifecycles.
Supply support for STM8AF6226TASSSY 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 ICs, sensors, and automotive-grade silicon for industrial and transportation markets.
The STM8AF series is ST's automotive-qualified 8-bit MCU product line, engineered specifically for cost-sensitive, high-reliability applications in powertrain, chassis, and body electronics where AEC-Q100 Grade 0 operation and embedded EEPROM are critical.
FAQ
Is STM8AF6226TASSSY pin-compatible with other STM8AF62xx devices in LQFP32?
Yes - STM8AF6226TASSSY shares identical LQFP32 pinout and electrical characteristics with STM8AF6223TASSY and STM8AF6213TASSY. All three support the same peripheral remapping bits and I/O voltage tolerances, enabling drop-in replacement where Flash/EEPROM capacity permits.
What debug interface does STM8AF6226TASSSY use, and what tools support it?
It uses the Single-Wire Interface Module (SWIM), a proprietary ST debug protocol requiring only one pin (SWIM) and ground. Supported tools include ST-LINK/V2, ST-LINK/V2-ISOL, and third-party emulators from IAR and Raisonance; no JTAG header is needed.
Does STM8AF6226TASSSY support LIN bootloader functionality out of the box?
No - while its LINUART peripheral complies with LIN 2.2 and handles frame generation/reception, a LIN bootloader must be implemented in firmware. ST provides AN4935 application note and example code for secure LIN firmware updates via SWIM or LINUART.
How is the 150 °C operating temperature validated, and what derating applies?
Validation follows AEC-Q100 Grade 0 test plan including 1000-hour high-temperature operating life (HTOL) at 150 °C junction temperature. No derating is required below 150 °C; however, maximum fCPU drops to 12 MHz above 125 °C per Figure 9 in DS9884 Rev 9.
STM8AF6226TASSSY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 28
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 640 x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 7x10b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6226TASSSY FAQ
1.How can I place an order for STM8AF6226TASSSY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6226TASSSY 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 STM8AF6226TASSSY reliable?
The price and inventory of STM8AF6226TASSSY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6226TASSSY is usually 5 days.
3.What payment methods are accepted for STM8AF6226TASSSY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6226TASSSY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6226TASSSY?
STM8AF6226TASSSY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6226TASSSY 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 STM8AF6226TASSSY?
For technical support, including STM8AF6226TASSSY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6226TASSSY requirements.
6.How does Aetrix verify that STM8AF6226TASSSY is sourced from the original manufacturer or authorized distributors?
All STM8AF6226TASSSY 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 STM8AF6226TASSSY meets industry standards.
7.What is the process for return or replacement of STM8AF6226TASSSY?
All STM8AF6226TASSSY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6226TASSSY, 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 STM8AF6226TASSSY part is unused and in its original packaging.
Return procedure for STM8AF6226TASSSY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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