16 MHz, 8 KB Flash — the automotive body-control sweet spot
The STMicroelectronics STM8AF6223PCU is an 8-bit automotive microcontroller built around the STM8A core, clocked at 16 MHz. The 16 MHz clock is adequate for LIN and I²C bus polling at standard bit rates, but don't expect to run heavy DSP or multi-protocol stacks — the 8-bit architecture and small RAM enforce a lean firmware design.
NRND — plan your supply chain now
That means ST is no longer actively promoting this part for new projects, and the last-time-buy window may already be closing or closed.
Connectivity and peripherals — what the bus supports
LIN handles the low-speed multiplexed bus for switches and actuators; I²C talks to local sensors or EEPROM; SPI connects to a CAN controller if the design needs CAN. The 16 I/O lines are enough for a handful of digital inputs and PWM outputs, but not for a 40-pin dashboard cluster. The 5-channel, 10-bit ADC handles analog inputs like potentiometer position or temperature sensing — adequate resolution for switch-level detection but not for precision measurement.
Package and rework — 20-TSSOP
Housed in a 20-lead TSSOP (4.40 mm body width, 0.65 mm pitch), this part is hand-reworkable with a fine-tip iron or hot-air pencil.