4-Bit/8-Bit MCU

The STM8AF6246, STM8AF6248, STM8AF6266 and STM8AF6268 automotive 8-bit microcontrollers offer from 16 to 32 Kbyte of Flash program memory and integrated true data EEPROM. They are referred to as medium density STM8A devices in STM8S series and STM8AF series 8-bit microcontrollers reference manual (RM0016).All devices of the STM8A product line provide the following benefits: reduced system cost, performance and robustness, short development cycles, and product longevity.The system cost is reduced thanks to an integrated true data EEPROM for up to 300 k write/erase cycles and a high system integration level with internal clock oscillators, watchdog, and brown-out reset.Device performance is ensured by a clock frequency of up to 16 MHz CPU and enhanced characteristics which include robust I/O, independent watchdogs (with a separate clock source), and a clock security system.Short development cycles are guaranteed due to application scalability across a common family product architecture with compatible pinout, memory map and modular peripherals. Full documentation is offered with a wide choice of development tools.Product longevity is ensured in the STM8A family thanks to their advanced core which is made in a state-of-the art technology for automotive applications with 3.3 V to 5 V operating supply.All STM8A and ST7 microcontrollers are supported by the same tools including STVD/STVP development environment, the STice emulator and a low-cost, third party in-circuit debugging tool.

Core

Max f_CPU: 16 MHz

Advanced STM8A core with Harvard architecture and 3-stage pipeline

Average 1.6 cycles/instruction resulting in 10 MIPS at 16 MHz f_CPUfor industry standard benchmark

Memories

Flash Program memory: 16 to 32 Kbyte Flash; data retention 20 years at 55 °C after 1 kcycle

Data memory: 0.5 to 1 Kbyte true data EEPROM; endurance 300 kcycle

RAM: 2 Kbyte

Clock management

Low-power crystal resonator oscillator with external clock input

Internal, user-trimmable 16 MHz RC and low-power 128 kHz RC oscillators

Clock security system with clock monitor

Reset and supply management

Wait/auto-wakeup/Halt low-power modes with user definable clock gating

Low consumption power-on and power-down reset

Interrupt management

Nested interrupt controller with 32 vectors

Up to 34 external interrupts on 5 vectors

Timers

Up to 2 general purpose 16-bit PWM timers with up to 3 CAPCOM channels each (IC, OC or PWM)

Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization

8-bit AR basic timer with 8-bit prescaler

Auto-wakeup timer

Window and independent watchdog timers

Communication interfaces

LINUART

LIN 2.2 compliant, master/slave modes with automatic resynchronization

SPI interface up to 8 Mbit/s or f_MASTER/2

I²C interface up to 400 Kbit/s

Analog-to-digital converter (ADC)

10-bit accuracy, 2LSB TUE accuracy, 2LSB TUE linearity ADC and up to 10 multiplexed channels with individual data buffer

Analog watchdog, scan and continuous sampling mode

I/Os

Up to 38 user pins including 10 HS I/Os

Highly robust I/O design, immune against current injection

Operating temperature up to 150 °C

Qualification conforms to AEC-Q100 rev G