STM8S903K3U3

8位MCU

The STM8S903K3/F3 access line 8-bit microcontrollers offer 8 Kbyte Flash program memory, plus integrated true data EEPROM. The STM8S microcontroller family reference manual RM0016 refers to devices in this family as low-density. They provide the following benefits: performance, robustness, and reduced system cost.

Device performance and robustness are ensured by advanced core and peripherals made in a state-of-the art technology, a 16 MHz clock frequency, robust I/Os, independent watchdogs with separate clock source, and a clock security system.

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.

Full documentation is offered as well as a wide choice of development tools.

**Key Features**

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Core

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16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline

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Extended instruction set

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Memories

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Program memory: 8 Kbyte Flash; data retention 20 years at 55 °C after 10 kcycle

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Data memory: 640 byte true data EEPROM; endurance 300 kcycle

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RAM: 1 Kbyte

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Clock, reset and supply management

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2.95 to 5.5 V operating voltage

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Flexible clock control, 4 master clock sources

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Low power crystal resonator oscillator

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External clock input

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Internal, user-trimmable 16 MHz RC

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Internal low-power 128 kHz RC

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Clock security system with clock monitor

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Power management:

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Low-power modes wait, active-halt, halt

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Switch-off peripheral clocks individually

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Permanently active, low-consumption power-on and power-down reset

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Interrupt management

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Nested interrupt controller with 32 interrupts

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Up to 28 external interrupts on 7 vectors

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Timers

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

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16-bit general purpose timer, with 3 CAPCOM channels IC, OC or PWM

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8-bit basic timer with 8-bit prescaler

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Auto wake-up timer

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Window watchdog and independent watchdog timers

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Communication interfaces

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UART with clock output for synchronous operation, SmartCard, IrDA, LIN master mode

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SPI interface up to 8 Mbit/s

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I2C interface up to 400 kbit/s

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Analog to digital converter ADC

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10-bit, ±1 LSB ADC with up to 7 multiplexed channels + 1 internal channel, scan mode and analog watchdog

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Internal reference voltage measurement

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I/Os

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Up to 28 I/Os on a 32-pin package including 21 high sink outputs

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Highly robust I/O design, immune against current injection

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Unique ID

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96-bit unique key for each device