STMicroelectronics STM8AF6223PCAX

Overview

STM8AF6223PCAX from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 8 Kbyte Flash memory, 640 byte data EEPROM, 10-bit ADC with 7 muxed channels, LIN 2.2-compliant UART, SPI, I²C, and operation up to 150 °C in LQFP32 package. It targets engine control units, body electronics, and LIN bus nodes requiring robust timing and high-temperature reliability.

For engineers reviewing the STM8AF6223PCAX datasheet, STM8AF6223PCAX pinout, STM8AF6223PCAX application, or STM8AF6223PCAX equivalent, key selection criteria include AEC-Q100 qualification, 150 °C operating temperature, LIN 2.2 compliance, 10-bit ADC accuracy (±1 LSB), and support for low-power wait/halt modes with auto-wakeup.

Technical Context

The device implements a Harvard-architecture STM8A core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution in safety-critical automotive functions. Clock management includes trimmable 16 MHz RC and 128 kHz low-power oscillators, plus external crystal/resonator support with clock security monitoring.

Interrupt handling uses a nested controller supporting 32 interrupts and up to 28 external inputs across 7 vectors. Peripheral integration includes an advanced 16-bit timer (TIM1) with dead-time insertion and complementary outputs, two additional 16-bit and 8-bit general-purpose timers, and analog-to-digital conversion with scan mode and analog watchdog.

Key Specifications

Pinout & Package

LQFP32 (7 × 7 mm, 0.8 mm pitch) package with 28 I/Os including 21 high-sink outputs, optimized for space-constrained automotive PCB layouts and ESD-immune routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive 8-bit microcontroller applications.

Compared with STM8AF6223PCAX, STM8AF6226TAY offers identical functionality in a smaller footprint but requires different PCB layout and reflow profile, while RL78/F13-BCF provides greater processing headroom at the cost of LIN hardware acceleration and AEC-Q100 Grade 0 validation depth.

Availability

STM8AF6223PCAX is available at Aetrix Electronics and suitable for engine control units, body electronics modules, and exhaust aftertreatment systems requiring stable component supply across extended automotive product lifecycles.

Supply support for STM8AF6223PCAX 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 STM8AF automotive microcontroller product line is designed specifically for under-hood and chassis applications demanding AEC-Q100 qualification, extended temperature operation, and integrated LIN/ADC/timer subsystems for cost-sensitive ECU implementations.

FAQ

What is the maximum junction temperature rating for STM8AF6223PCAX?

The STM8AF6223PCAX is rated for operation up to +150 °C junction temperature and is qualified per AEC-Q100 Grade 0, making it suitable for under-hood applications such as engine control, transmission control, and exhaust gas recirculation systems where ambient temperatures exceed 125 °C.

Does STM8AF6223PCAX support hardware LIN 2.2 frame checksum calculation?

Yes, the integrated LINUART peripheral performs automatic checksum generation and verification for LIN 2.2 frames in both master and slave modes, including support for enhanced checksum (with identifier) and classic checksum (without identifier), reducing CPU overhead during bus communication.

Can the internal 16 MHz RC oscillator be trimmed for improved accuracy?

Yes, the internal high-speed RC oscillator (HSI) is user-trimmable via the CLK_HSITRIMR register, allowing adjustment in steps of ±0.5% over a total range of ±8%, enabling calibration to within ±1% accuracy across voltage and temperature for clock-critical timing functions.

What debug interface does STM8AF6223PCAX use, and what pins are required?

The device uses the Single Wire Interface Module (SWIM) for in-circuit debugging and programming, requiring only one dedicated pin (PD3) plus VDD and VSS. SWIM supports full breakpoint, step-through, and memory inspection capabilities without occupying additional GPIO resources.