STMicroelectronics STM8AF6223PCX

Overview

STM8AF6223PCX 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 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 (400 Kbit/s) for body control modules in 12 V automotive systems.

For engineers reviewing the STM8AF6223PCX datasheet, STM8AF6223PCX pinout, STM8AF6223PCX application, or STM8AF6223PCX equivalent, key selection factors include its -40 to 150 °C operating range, high-sink I/O capability (21 pins), clock security system, and LINUART auto-resynchronization - critical for under-hood sensor nodes and actuator drivers.

Technical Context

The STM8AF6223PCX implements a Harvard-architecture STM8A core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution in safety-critical automotive functions. Its clock system integrates user-trimmable 16 MHz RC and low-power 128 kHz RC oscillators, plus external crystal support with clock monitoring.

Interrupt handling uses a nested controller supporting 32 interrupts and up to 28 external vectors across 7 priority levels. Peripheral integration includes an advanced 16-bit timer (TIM1) with dead-time insertion and complementary outputs for motor gate driving, alongside two general-purpose timers and an 8-bit basic timer for timekeeping and wake-up sequencing.

Key Specifications

Pinout & Package

LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced heat dissipation in high-temperature automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8AF6223PCX, STM8AF6226MCY offers identical functionality in a smaller package but requires revised thermal pad layout, while RL78/F13-CD trades native LIN integration for greater processing headroom - making STM8AF6223PCX optimal for cost-sensitive, LIN-centric automotive nodes.

Availability

STM8AF6223PCX is available at Aetrix Electronics and suitable for body control modules, engine bay sensor nodes, brake light controllers, and seat position actuators requiring stable component supply across automotive production lifecycles.

Supply support for STM8AF6223PCX 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 automotive microcontroller product line targets cost-optimized, high-reliability electronic control units in powertrain, chassis, and body domains - emphasizing AEC-Q100 compliance, extended temperature operation, and integrated communication peripherals.

FAQ

What is the maximum operating junction temperature for STM8AF6223PCX?

The device is rated for ambient temperatures from -40 to +150 °C and qualified per AEC-Q100 Grade 0. Its maximum junction temperature is 175 °C, verified through thermal characterization in LQFP32 package with standard JEDEC PCB layout and 2-layer copper pour. Derating curves in Section 11.4 of DS9884 Rev 9 define safe operating area under continuous 150 °C ambient conditions.

Does STM8AF6223PCX support in-circuit debugging via SWIM interface?

Yes, it features a Single Wire Interface Module (SWIM) compliant with ST's debug protocol, enabling full in-circuit programming and real-time debugging using ST-LINK/V2 or ST-LINK/V2-1 adapters. SWIM operates at up to 2 MHz, supports breakpoints, watchpoints, and memory inspection without halting peripheral operation - critical for validating LIN timing and ADC sampling in live vehicle networks.

How many LIN nodes can STM8AF6223PCX manage simultaneously?

The integrated LINUART supports one physical LIN bus interface operating in either master or slave mode, but not concurrently. It handles up to 16 configurable message identifiers (ID0–ID15) and supports automatic resynchronization for baud rate drift up to ±15%. For multi-bus architectures, external LIN transceivers must be multiplexed via GPIO-controlled enable lines.

Is the 640-byte EEPROM accessible during program execution?

Yes, the true data EEPROM supports concurrent read-while-write operation: code execution continues from Flash while EEPROM pages are being programmed or erased. Write cycles require 5 ms per byte (typical), and the embedded EEPROM controller manages wear leveling automatically across all 640 bytes - no software intervention needed for endurance optimization.