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STMicroelectronics STM8AF62A6UCX
- Part No.:
- STM8AF62A6UCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
STM8AF62A6UCX.pdf
- Description:
- IC MCU 8BIT 128KB FLASH 32VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,482
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Product details
Overview
STM8AF62A6UCX from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit microcontroller featuring a 24 MHz STM8A core, 64 Kbyte Flash program memory, 2 Kbyte data EEPROM, 10-bit ADC with 16-channel multiplexing, CAN 2.0B interface, and operation up to 150 °C - deployed in engine control units for real-time sensor signal acquisition and actuator command execution.
For engineers reviewing the STM8AF62A6UCX datasheet, STM8AF62A6UCX pinout, STM8AF62A6UCX application, or STM8AF62A6UCX equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and communication specifications, and direct alternative part comparisons for ECU and body control module design.
Technical Context
The device implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, enabling 10 MIPS at 16 MHz. It integrates dual clock domains: a user-trimmable 16 MHz RC oscillator and a low-power 128 kHz RC source, both monitored by a dedicated clock security system (CSS) with automatic failover detection.
Its peripheral set includes a high-speed CAN 2.0B controller (1 Mbit/s), LINUART compliant with LIN 2.2 (master/slave with auto-resynchronization), and three synchronous serial interfaces (SPI up to 10 Mbit/s, I²C up to 400 kbit/s, USART with clock output). The ADC supports hardware-triggered conversions with 2 LSB total unadjusted error and 1 LSB linearity over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic interrupt latency and efficient code density for safety-critical automotive firmware. |
| Max fCPU | 24 MHz at 3–5.5 V supply; supports real-time control loops with sub-42 ns instruction cycle time. |
| Flash Memory | 64 Kbyte on-chip Flash with 20-year data retention at 55 °C; supports in-application programming and read-out protection (ROP) for firmware IP security. |
| Data EEPROM | 2 Kbyte true data EEPROM with 300 kcycle endurance; eliminates need for external nonvolatile storage in parameter logging and calibration storage. |
| CAN Interface | High-speed CAN 2.0B compliant controller (1 Mbit/s); integrated message RAM and filtering for robust vehicle network node implementation. |
| ADC Resolution | 10-bit SAR ADC with 2 LSB TUE and 1 LSB linearity; ensures accurate analog sensor readings (e.g., throttle position, coolant temp) across -40 to +150 °C. |
| Operating Temp | -40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0, enabling placement in under-hood environments without thermal derating. |
| I/O Count | Up to 68 user pins including 11 high-sink I/Os; supports direct drive of LEDs, relays, and discrete loads in body electronics modules. |
Pinout & Package
LQFP64 package: 64-pin, 10 × 10 mm, 0.5 mm pitch, exposed pad (EPAD) for thermal enhancement - compatible with standard automotive PCB assembly processes and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domain: VDD powers digital logic and I/O; VSS provides reference return path; EPAD connected to VSS for thermal dissipation. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external reset IC signals or manual reset button; supports low-power wake-up via reset pin edge detection. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7 | General-purpose bidirectional I/O ports | 64 total I/O pins with configurable pull-up/pull-down, alternate function remapping, and current sink capability up to 20 mA per pin (11 pins rated for 25 mA). |
| PD0/PD1 | CAN TX/RX | Dedicated differential CAN transceiver interface pins; support direct connection to ISO 11898-2 compliant physical layer drivers. |
| PA3/PA4 | LINUART TX/RX | Single-wire LIN bus interface supporting master/slave modes and automatic resynchronization per LIN 2.2 specification. |
| PC0/PC1/PC2 | SPI SCK/MOSI/MISO | Full-duplex SPI interface operating up to 10 Mbit/s; supports daisy-chain configuration for multi-sensor systems (e.g., pressure, temperature clusters). |
| PC5/PC6 | I²C SCL/SDA | Standard-mode and fast-mode I²C interface (400 kbit/s); includes built-in slew-rate control and noise filtering for reliable communication with EEPROMs and sensors. |
| PA0–PA7 (ADC) | Analog input channels | 16 multiplexed ADC inputs mapped across port A–E; support simultaneous sampling trigger from TIM1/TIM2 for synchronized engine cylinder monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Control Timer (TIM1) | 16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - enables precise 3-phase motor gate driving in electric power steering systems. |
| Window Watchdog (WWDG) | Configurable time window and early wakeup interrupt - provides fail-safe supervision for safety-critical firmware execution in ASIL-B compliant designs. |
| Low-Power Modes | Wait, Auto-Wakeup, Halt, and Active-Halt modes with selective peripheral clock gating - reduces current consumption to 1.5 µA in Halt mode while retaining RAM and register state. |
| SWIM Debug Interface | Single-wire debug interface with non-intrusive real-time variable inspection and flash programming - supports in-vehicle diagnostics and field firmware updates without JTAG header. |
| Robust I/O Design | Immunity against current injection up to 100 mA per pin - prevents latch-up during load dump or ESD events in 12 V automotive electrical systems. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time acquisition of crankshaft position, camshaft timing, and oxygen sensor signals; closed-loop fuel injection and ignition timing calculation. IC Role / Device Role / Timing Role: Primary MCU executing control algorithms with deterministic 24 MHz timing; CAN handles communication with dashboard and transmission ECUs. Use Value: 10-bit ADC with 16-channel mux and hardware-triggered sampling enables synchronized multi-sensor capture at 100 kS/s, critical for misfire detection. |
Use Scenario: Centralized management of door locks, interior lighting, window lifters, and mirror controls in passenger vehicles. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slave nodes (e.g., seat controllers, mirror actuators) and local I²C sensors (ambient light, occupancy). Use Value: Integrated LINUART with automatic resynchronization tolerates bus voltage fluctuations during battery transients, ensuring reliable slave node polling. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
|
Use Scenario: Gear selection logic, solenoid valve actuation, and torque converter clutch control based on vehicle speed and throttle position. IC Role / Device Role / Timing Role: Safety-monitored controller with WWDG and clock security system; CAN communicates with ECU and ABS modules for coordinated torque management. Use Value: AEC-Q100 Grade 0 qualification and 150 °C operation allow mounting directly on transmission housing without heatsink or derating. |
Use Scenario: Torque assist calculation using steering angle, torque sensor, and vehicle speed inputs; generation of PWM gate signals for 3-phase BLDC motor driver. IC Role / Device Role / Timing Role: Motor control MCU with advanced TIM1 timer delivering dead-time compensated complementary PWM outputs to gate drivers. Use Value: 16-bit advanced control timer with flexible synchronization enables precise phase-shifted PWM generation for smooth torque ripple reduction. |
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 |
|---|---|---|---|
| STM8AF62A8UCX | Same LQFP64 package and peripheral set, but with 128 Kbyte Flash and identical 2 Kbyte EEPROM. | Preferred where larger firmware image size is required (e.g., OTA update support, dual-bank bootloaders). | Select when future firmware expansion headroom is needed without changing PCB layout or toolchain. |
| STM32F042F6P6 | 32-bit ARM Cortex-M0 core, 32 Kbyte Flash, no CAN, but includes USB 2.0 FS device and higher analog integration (12-bit ADC, DAC). | Better suited for cost-sensitive body electronics with USB diagnostics or mixed-signal requirements, not CAN-based powertrain systems. | Choose only if CAN is not required and USB connectivity or higher-resolution analog features justify architecture shift and software rework. |
Compared with STM8AF62A8UCX, the STM8AF62A6UCX offers optimal Flash size for mature ECU firmware with lower BOM cost; versus STM32F042F6P6, it delivers proven CAN reliability and AEC-Q100 Grade 0 compliance without requiring ARM toolchain migration or USB stack integration.
Availability
STM8AF62A6UCX 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 STM8AF62A6UCX 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.
This device belongs to the STM8AF automotive microcontroller family, engineered specifically for under-hood and chassis control applications demanding AEC-Q100 Grade 0 reliability, extended temperature operation, and integrated CAN/LIN communication.
FAQ
What is the maximum operating frequency and voltage range for STM8AF62A6UCX?
The STM8AF62A6UCX operates at up to 24 MHz across a supply voltage range of 3.0 V to 5.5 V. Its fCPU vs. VDD curve (Figure 11 in DocID14395 Rev 15) confirms stable 24 MHz operation down to 4.5 V; below that, maximum frequency scales linearly to 16 MHz at 3.0 V. This ensures compatibility with both 5 V legacy automotive systems and modern 3.3 V domains with appropriate level-shifting.
Does STM8AF62A6UCX support in-circuit debugging and programming?
Yes, it features a Single Wire Interface Module (SWIM) supporting non-intrusive debugging, real-time variable observation, and flash programming via a single pin (SWIM). ST-LINK/V2 and ST-LINK/V3 debuggers are fully compatible, and no external crystal is required for SWIM operation - enabling rapid development and field firmware updates without JTAG headers or additional PCB space.
How does the CAN interface comply with automotive standards?
The integrated beCAN controller meets ISO 11898-1 (CAN protocol) and supports bit rates up to 1 Mbit/s with programmable sample points, loopback mode for self-test, and 32-message object buffers with hardware acceptance filtering. It is validated per AEC-Q100 Grade 0 and used in production ECUs certified to ISO 26262 ASIL-B for fault detection and recovery in safety-related networks.
What packaging and RoHS compliance status does STM8AF62A6UCX have?
The STM8AF62A6UCX is supplied in a RoHS-compliant, halogen-free LQFP64 package (10 × 10 mm, 0.5 mm pitch) with matte tin lead finish. Its mechanical drawing (Table 50, DocID14395 Rev 15) specifies JEDEC-standard footprint and thermal pad design for optimal solder joint reliability and thermal performance in automotive reflow profiles.
STM8AF62A6UCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- STM8A
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 6K 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:
STM8AF62A6UCX FAQ
1.How can I place an order for STM8AF62A6UCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF62A6UCX 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 STM8AF62A6UCX reliable?
The price and inventory of STM8AF62A6UCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF62A6UCX is usually 5 days.
3.What payment methods are accepted for STM8AF62A6UCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF62A6UCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF62A6UCX?
STM8AF62A6UCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF62A6UCX 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 STM8AF62A6UCX?
For technical support, including STM8AF62A6UCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF62A6UCX requirements.
6.How does Aetrix verify that STM8AF62A6UCX is sourced from the original manufacturer or authorized distributors?
All STM8AF62A6UCX 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 STM8AF62A6UCX meets industry standards.
7.What is the process for return or replacement of STM8AF62A6UCX?
All STM8AF62A6UCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF62A6UCX, 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 STM8AF62A6UCX part is unused and in its original packaging.
Return procedure for STM8AF62A6UCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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