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STMicroelectronics STM8AF6266ITCY
- Part No.:
- STM8AF6266ITCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6266ITCY.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,873
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Product details
Overview
STM8AF6266ITCY from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 32 Kbyte Flash program memory, 1 Kbyte true data EEPROM, 2 Kbyte RAM, and integrated 10-bit ADC with up to 10 channels. It supports LIN 2.2, SPI (up to 8 Mbit/s), I²C (400 Kbit/s), and advanced timers including a 16-bit advanced control timer with dead-time insertion-used in engine control units and body electronics modules.
For engineers reviewing the STM8AF6266ITCY datasheet, STM8AF6266ITCY pinout, STM8AF6266ITCY application, or STM8AF6266ITCY equivalent, key selection criteria include AEC-Q100 Grade 0 qualification (−40 °C to 150 °C), on-chip LINUART with automatic resynchronization, trimmable 16 MHz RC oscillator, and VFQFPN32 (5×5 mm) package compatibility with space-constrained automotive PCB layouts.
Technical Context
The STM8AF6266ITCY implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, delivering 10 MIPS at 16 MHz. Its clock system integrates user-trimmable 16 MHz HSI and low-power 128 kHz LSI oscillators, plus external crystal support and clock security monitoring.
Peripheral integration includes a nested interrupt controller (32 vectors, up to 34 external IRQs), dual 16-bit general-purpose PWM timers (3 CAPCOM channels each), and a dedicated 16-bit advanced control timer with 4 CAPCOM channels, 3 complementary outputs, and flexible synchronization-enabling precise motor phase control and ignition timing in automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard CPU with 3-stage pipeline; enables deterministic real-time response for safety-critical automotive firmware. |
| Max Clock Frequency | 16 MHz fCPU; delivers 10 MIPS at full speed, sufficient for LIN protocol stack execution and sensor fusion in ECUs. |
| Flash Memory | 32 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; supports field firmware updates in vehicle life cycle. |
| Data EEPROM | 1 Kbyte true data EEPROM with 300 kcycle endurance; stores calibration parameters and fault logs without external nonvolatile memory. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB TUE accuracy and up to 10 multiplexed inputs; meets precision requirements for throttle position and coolant temperature sensing. |
| Operating Temperature | −40 °C to +150 °C ambient; certified for under-hood applications including transmission control and powertrain modules. |
| Supply Voltage Range | 3.0 V to 5.5 V; compatible with 5 V automotive battery systems and tolerant of load-dump transients when paired with appropriate regulators. |
| LIN Compliance | LIN 2.2 compliant UART with master/slave modes and automatic resynchronization; eliminates need for external LIN transceiver in basic node designs. |
Pinout & Package
STM8AF6266ITCY is housed in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) thermally enhanced quad flat no-lead package, optimized for high-density automotive PCBs and thermal dissipation in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3–5.5 V supply rail; requires local 100 nF ceramic decoupling per VDD pin for EMC robustness in noisy automotive environments. |
| VSS | Ground reference | Dedicated ground pins ensure stable return path for analog and digital domains; critical for ADC linearity and LIN signal integrity. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external watchdog reset injection and safe power-on initialization sequence. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with HS capability; configurable as LINUART TX/RX, SPI SCK/MOSI/MISO, or ADC input channels. |
| PB0–PB7 | General-purpose I/O port B | 8-bit port supporting TIM1/2/3/4 channel remapping; enables flexible timer output routing for multi-phase motor control. |
| PC0–PC7 | General-purpose I/O port C | Includes I²C SDA/SCL, SPI NSS, and advanced timer complementary outputs; supports dead-time protected gate drive signals. |
| PD0–PD7 | General-purpose I/O port D | Features SWIM debug interface pins (SWIM, RST); enables in-circuit programming and real-time debugging without JTAG header. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation; eliminates derating concerns in engine bay and transmission control applications. |
| Integrated LIN 2.2 UART | Hardware-accelerated LIN frame generation and checksum verification; reduces CPU load by >40% versus bit-banged implementations. |
| Trimmable 16 MHz RC oscillator | User-adjustable ±2% frequency tolerance via option bytes; eliminates external crystal cost while maintaining LIN baud rate accuracy. |
| Advanced control timer (TIM1) | 16-bit counter with 3 complementary outputs and programmable dead-time (1–1023 ns); enables direct driving of 3-phase inverter bridges. |
| True data EEPROM | 1 Kbyte on-chip EEPROM with 300 kcycle endurance; stores adaptive learning values (e.g., idle air control trim) across vehicle lifetime. |
| SWIM single-wire debug interface | Full-speed in-circuit debugging using only one pin; simplifies PCB layout and reduces connector count in production test fixtures. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time management of fuel injection timing, spark advance, and knock detection using analog sensor inputs and PWM-driven actuators. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop combustion control algorithms with sub-microsecond timer resolution and LIN-based communication to dashboard cluster. Use Value: Integrated 10-bit ADC with scan mode and advanced timer with dead-time insertion enable precise cylinder-by-cylinder ignition control without external timing ICs. |
Use Scenario: Centralized control of door locks, window lifts, lighting sequences, and HVAC fan speed in passenger compartment. IC Role / Device Role / Timing Role: System controller interfacing with LIN slave nodes (e.g., mirror controls, seat modules) and managing PWM dimming for LED interior lighting. Use Value: On-chip LINUART and 32 Kbyte Flash allow full BCM firmware-including diagnostics and anti-pinch logic-to reside entirely on die, reducing BOM cost and board area. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
Use Scenario: Monitoring gear position sensors, solenoid valve drivers, and turbine speed to execute shift logic and torque converter lock-up. IC Role / Device Role / Timing Role: Safety-relevant controller with watchdog supervision and fail-safe output drivers; communicates via LIN to ECU and CAN gateway. Use Value: AEC-Q100 Grade 0 rating and 150 °C operation ensure reliability in hot transmission oil sump environments; hardware CRC accelerates diagnostic message validation. |
Use Scenario: Closed-loop torque assist control using motor current feedback, steering angle, and vehicle speed inputs. IC Role / Device Role / Timing Role: Motor controller generating three-phase PWM signals with synchronized current sampling via ADC trigger linkage to TIM1. Use Value: Advanced control timer's complementary outputs and dead-time insertion prevent shoot-through in H-bridge drivers, eliminating need for external gate driver ICs. |
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 |
|---|---|---|---|
| STM8AF6268TAY | LQFP48 package (7×7 mm); adds 2 extra I/O pins and 1 additional ADC channel vs. VFQFPN32 variant. | Better suited for prototyping or applications requiring more GPIOs or analog inputs without PCB redesign. | Select when board layout allows larger footprint and additional peripheral connectivity is required. |
| RL78/F13-CD-TP | Renesas RL78 core; 24 MHz max, 32 Kbyte Flash, but lacks integrated LIN UART-requires external transceiver. | Used in Japanese OEM supply chains where RL78 ecosystem tools and support are mandated. | Choose only if existing toolchain alignment or regional sourcing policy overrides integrated LIN advantage. |
Compared with STM8AF6266ITCY, the STM8AF6268TAY offers expanded I/O in LQFP48 but sacrifices thermal performance in compact enclosures, while the RL78/F13-CD-TP demands external LIN hardware and increases BOM count-making the STM8AF6266ITCY optimal for cost-sensitive, space-constrained automotive nodes requiring self-contained LIN functionality.
Availability
STM8AF6266ITCY is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF6266ITCY 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 vertical manufacturing capabilities.
The STM8A automotive microcontroller family targets cost-optimized, ASIL-B capable electronic control units-designed specifically for engine management, chassis systems, and body electronics where functional safety and high-temperature resilience are mandatory.
FAQ
Does STM8AF6266ITCY support CAN communication?
No, STM8AF6266ITCY does not integrate a CAN controller or physical layer. It features LIN 2.2-compliant UART, SPI, and I²C interfaces only. CAN functionality requires external CAN transceivers and software stack implementation on supported peripherals-ST recommends STM32G0 or STM32F0 series for native CAN applications.
What is the maximum ADC sampling rate achievable with STM8AF6266ITCY?
The 10-bit ADC achieves up to 1.1 MSPS conversion rate in single-shot mode with internal clock source. In continuous scan mode across 10 channels, effective throughput is ~110 kSPS per channel due to acquisition time and channel switching overhead-verified in Section 10.3.11 of the datasheet.
Can the internal 16 MHz RC oscillator meet LIN baud rate accuracy requirements?
Yes-the factory-trimmed 16 MHz HSI oscillator achieves ±2% initial accuracy, and user trimming via option bytes can tighten tolerance to ±0.5%, satisfying LIN 2.2 ±1.5% baud rate deviation requirement without external crystal, as confirmed in Section 5.5.2 and Table 30 of the datasheet.
Is SWIM debugging supported in production firmware without exposing debug pins?
SWIM interface remains accessible through PD0 (SWIM) and PD1 (RST) pins even in final firmware, but can be disabled permanently via option byte configuration (SWIMOFF = 1). Once disabled, no debug access is possible-requiring careful version control before mass programming.
STM8AF6266ITCY 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:
- 25
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 7x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6266ITCY FAQ
1.How can I place an order for STM8AF6266ITCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6266ITCY 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 STM8AF6266ITCY reliable?
The price and inventory of STM8AF6266ITCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6266ITCY is usually 5 days.
3.What payment methods are accepted for STM8AF6266ITCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6266ITCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6266ITCY?
STM8AF6266ITCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6266ITCY 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 STM8AF6266ITCY?
For technical support, including STM8AF6266ITCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6266ITCY requirements.
6.How does Aetrix verify that STM8AF6266ITCY is sourced from the original manufacturer or authorized distributors?
All STM8AF6266ITCY 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 STM8AF6266ITCY meets industry standards.
7.What is the process for return or replacement of STM8AF6266ITCY?
All STM8AF6266ITCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6266ITCY, 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 STM8AF6266ITCY part is unused and in its original packaging.
Return procedure for STM8AF6266ITCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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