4-Bit/8-Bit MCU

The STM8AF526x/8x/Ax and STM8AF6269/8x/Ax automotive 8-bit microcontrollers described in this datasheet offer from 32 Kbyte to 128 Kbyte of non volatile memory and integrated true data EEPROM. They are referred to as high density STM8A devices in STM8S series and STM8AF series 8-bit microcontrollers reference manual (RM0016).The STM8AF52 series features a CAN interface.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, wtachdog, and brown-out reset.Device performance is ensured by 20 MIPS at 24 MHz CPU clock frequency and enhanced characteristics which include robust I/O, independent watchdogs (with a separate clock source), and a clock security system.

Core

Max f_CPU: 24 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

Program memory: 32 to 128 Kbyte Flash program; data retention 20 years at 55 °C

Data memory: up to 2 Kbyte true data EEPROM; endurance 300 kcycle

RAM: 6 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 37 external interrupts on 5 vectors

Timers

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

I/Os

Up to 68 user pins (11 high sink I/Os)

Highly robust I/O design, immune against current injection

Communication interfaces

High speed 1 Mbit/s CAN 2.0B interface

USART with clock output for synchronous operation - LIN master mode

LINUART LIN 2.2 compliant, master/slave modes with automatic resynchronization

SPI interface up to 10 Mbit/s or f_MASTER/2

I²C interface up to 400 Kbit/s

Analog to digital converter (ADC)

10-bit resolution, 2 LSB TUE, 1 LSB linearity and up to 16 multiplexed channels

Operating temperature up to 150 °C

Qualification conforms to AEC-Q100 grade 0