Mainstream Access line 8-bit MCU with 16 Kbytes Flash, 16 MHz CPU, integrated EEPROM

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  • The STM8S105x4/6 access line 8-bit microcontrollers offer from 16 to 32 Kbyte Flash program memory, plus integrated true data EEPROM. The STM8S microcontroller family reference manual (RM0016) refers to devices in this family as medium-density. All devices of the STM8S105x4/6 access 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 16 MHz CPU clock frequency 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 common family product architecture with compatible pinout, memory map and modular peripherals.
    Product longevity is ensured in the STM8S family thanks to their advanced core which is made in a state-of-the-art technology for applications with 2.95 V to 5.5 V operating supply.
    Full documentation is offered as well as a wide choice of development tools.

    Key Features

    • Core
      • 16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline
      • Extended instruction set
    • Memories
      • Program memory: up to 32 Kbyte Flash; data retention 20 years at 55 °C after 10 kcycle
      • Data memory: up to 1 Kbyte true data EEPROM; endurance 300 kcycle
      • RAM: up to 2 Kbyte
    • Clock, reset and supply management
      • 2.95 to 5.5 V operating voltage
      • Flexible clock control, 4 master clock sources
        • Low power crystal resonator oscillator
        • External clock input
        • Internal, user-trimmable 16 MHz RC
        • Internal low-power 128 kHz RC
      • Clock security system with clock monitor
      • Power management:
        • Low-power modes (wait, active-halt, halt)
        • Switch-off peripheral clocks individually
      • Permanently active, low-consumption power-on and power-down reset
    • Interrupt management
      • Nested interrupt controller with 32 interrupts
      • Up to 37 external interrupts on 6 vectors
    • Timers
      • Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization
      • 2x16-bit general purpose timer, with 2+3 CAPCOM channels (IC, OC or PWM)
      • 8-bit basic timer with 8-bit prescaler
      • Auto wake-up timer
      • Window watchdog and independent watchdog timers
    • Communication interfaces
      • UART with clock output for synchronous operation, SmartCard, IrDA, LIN master mode
      • SPI interface up to 8 Mbit/s
      • I2C interface up to 400 kbit/s
    • Analog to digital converter (ADC)
      • 10-bit, ±1 LSB ADC with up to 10 multiplexed channels, scan mode and analog watchdog
    • I/Os
      • Up to 38 I/Os on a 48-pin package including 16 high sink outputs
      • Highly robust I/O design, immune against current injection
    • Unique ID
      • 96-bit unique key for each device

Circuit Diagram

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STM8S105K4U6A

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STM8S105K4U6ATR

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STM8S105K4T3CTR

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STM8S105K4B6

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STM8S105K4U3A

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STM8S105K4U3ATR

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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS5855
      Access line, 16 MHz STM8S 8-bit MCU, up to 32 Kbyte Flash, integrated EEPROM, 10-bit ADC, timers, UART, SPI, I²C
      15.0
      1.93 MB
      PDF
      DS5855

      Access line, 16 MHz STM8S 8-bit MCU, up to 32 Kbyte Flash, integrated EEPROM, 10-bit ADC, timers, UART, SPI, I²C

    • Description Version Size Action
      AN3143
      Audio software codec for the STM8S
      1.3
      250.38 KB
      PDF
      AN3280
      Displaying variable voltage on a bar of LEDs using STM8S-DISCOVERY
      1.3
      148.64 KB
      PDF
      AN2860
      EMC guidelines for STM8 microcontrollers
      5.2
      260.49 KB
      PDF
      AN1181
      Electrostatic discharge sensitivity measurement
      1.6
      49.01 KB
      PDF
      AN2752
      Getting started with STM8S and STM8AF microcontrollers
      6.0
      2.36 MB
      PDF
      AN3236
      Increase the number of touchkeys for touch sensing applications on MCUs
      5.0
      177.24 KB
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      AN3208
      Microstepping motor drive with STM8A and STM8S microcontrollers
      1.3
      284.11 KB
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      AN2645
      Migration and compatibility guidelines for STM8S microcontroller applications
      1.4
      525.01 KB
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      AN2867
      Oscillator design guide for STM8AF/AL/S and STM32 microcontrollers
      11.0
      2.79 MB
      PDF
      AN3259
      RS232 communications with a terminal using the STM8S-DISCOVERY
      1.2
      299.08 KB
      PDF
      AN3258
      STM8AF and STM8S series HSI oscillator calibration using LIN automatic resynchronization
      2.0
      247.91 KB
      PDF
      AN2945
      STM8S and STM32™ MCUs: a consistent 8/32-bit product line for painless migration
      1.4
      209.97 KB
      PDF
      AN2857
      STM8S and STM8A family power management
      3.2
      268.96 KB
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      AN2822
      STM8S and STM8A high speed internal oscillator calibration
      2.2
      195.08 KB
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      AN2646
      Smartcard interface with the STM8S microcontroller
      2.4
      442.01 KB
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      AN2658
      Using the analog to digital converter of the STM8S microcontroller
      2.5
      183.01 KB
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      AN3143

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      AN3280

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      AN1181

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      AN2752

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      AN3259

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      AN2945

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      AN2857

      STM8S and STM8A family power management

      AN2822

      STM8S and STM8A high speed internal oscillator calibration

      AN2646

      Smartcard interface with the STM8S microcontroller

      AN2658

      Using the analog to digital converter of the STM8S microcontroller

    • Description Version Size Action
      TN1163
      Description of WLCSP for microcontrollers and recommendations for its use
      4.0
      1.07 MB
      PDF
      TN0189
      STM8 bootloader frequently asked questions
      2.5
      317.56 KB
      PDF
      TN1205
      Tape and reel shipping media for STM8 and STM32 microcontrollers in FPN packages
      3.0
      753.31 KB
      PDF
      TN1206
      Tape and reel shipping media for STM8 and STM32 microcontrollers in QFP packages
      3.0
      830.98 KB
      PDF
      TN1207
      Tape and reel shipping media for STM8 and STM32 microcontrollers in SO packages
      1.0
      755.03 KB
      PDF
      TN1208
      Tape and reel shipping media for STM8 and STM32 microcontrollers in TSSOP and SSOP packages
      1.0
      743.08 KB
      PDF
      TN1163

      Description of WLCSP for microcontrollers and recommendations for its use

      TN0189

      STM8 bootloader frequently asked questions

      TN1205

      Tape and reel shipping media for STM8 and STM32 microcontrollers in FPN packages

      TN1206

      Tape and reel shipping media for STM8 and STM32 microcontrollers in QFP packages

      TN1207

      Tape and reel shipping media for STM8 and STM32 microcontrollers in SO packages

      TN1208

      Tape and reel shipping media for STM8 and STM32 microcontrollers in TSSOP and SSOP packages

    • Description Version Size Action
      UM1477
      STEVAL-IFN004V1: BLDC six-step motor drive based on the L6230 and STM8
      1.1
      1,008.17 KB
      PDF
      UM1477

      STEVAL-IFN004V1: BLDC six-step motor drive based on the L6230 and STM8

    • Description Version Size Action
      RM0016
      STM8S Series and STM8AF Series 8-bit microcontrollers
      14.0
      9.48 MB
      PDF
      RM0016

      STM8S Series and STM8AF Series 8-bit microcontrollers

    • Description Version Size Action
      PM0051
      How to program STM8S and STM8A Flash program memory and data EEPROM
      3.4
      191.55 KB
      PDF
      PM0044
      STM8 CPU programming manual
      3.5
      897.69 KB
      PDF
      PM0051

      How to program STM8S and STM8A Flash program memory and data EEPROM

      PM0044

      STM8 CPU programming manual

    • Description Version Size Action
      ES0110
      STM8S005xx and STM8S105xx device limitations
      8.0
      447.97 KB
      PDF
      ES0110

      STM8S005xx and STM8S105xx device limitations

    • Description Version Size Action
      STM8S105x option list (16- to 32-Kbyte) 1.0
      1.95 KB
      ZIP

      STM8S105x option list (16- to 32-Kbyte)

    • Description Version Size Action
      DN0005
      A three phase induction motor drive using a V/F control
      2.1
      528.11 KB
      PDF
      DN0005

      A three phase induction motor drive using a V/F control

    • Description Version Size Action
      AN5183
      Adjustable LED blinking speed using STM8 Nucleo-64 boards
      1.0
      141.73 KB
      PDF
      AN3277
      Adjustable buzzer frequency using STM8S-DISCOVERY touch sensing key
      1.7
      183.85 KB
      PDF
      AN3143
      Audio software codec for the STM8S
      1.3
      250.38 KB
      PDF
      AN2737
      Basic in-application programming example using the STM8 I²C and SPI peripherals
      3.6
      184.99 KB
      PDF
      AN5181
      Building a thermometer using the STM8 Nucleo-64 boards
      1.0
      687.2 KB
      PDF
      AN3260
      Building a thermometer using the STM8S-DISCOVERY
      1.4
      291.74 KB
      PDF
      AN5176
      Displaying variable voltage on a bar of LEDs using STM8 Nucleo-64 boards
      1.0
      161.83 KB
      PDF
      AN3280
      Displaying variable voltage on a bar of LEDs using STM8S-DISCOVERY
      1.3
      148.64 KB
      PDF
      AN5180
      Generating PWM signals using STM8 Nucleo-64 boards
      1.0
      142.09 KB
      PDF
      AN3332
      Generating PWM signals using STM8S-DISCOVERY
      1.4
      84.35 KB
      PDF
      AN3181
      Guidelines for obtaining UL/CSA/IEC 60730-1/60335-1 Class B certification in any STM8 application
      4.0
      845.21 KB
      PDF
      AN3265
      Handling hardware and software failures with the STM8S-DISCOVERY
      1.3
      191.61 KB
      PDF
      AN5182
      Image viewer based on the Adafruit® TFT shield with STM8 Nucleo-64 boards
      1.0
      8.1 MB
      PDF
      AN2719
      Precision improvement techniques for the A/D converter of the STM8 microcontroller
      2.7
      236.73 KB
      PDF
      AN5179
      RS232 communications with a terminal using the STM8 Nucleo-64 boards
      1.0
      359.52 KB
      PDF
      AN3259
      RS232 communications with a terminal using the STM8S-DISCOVERY
      1.2
      299.08 KB
      PDF
      AN2780
      Real-time keeping on STM8S and STM8A devices and usage of auto-wakeup unit (AWU) and beeper
      2.3
      385.92 KB
      PDF
      AN2927
      Resistor-Capacitor (RC) acquisition principle for STM8 touch sensing applications
      3.0
      332.05 KB
      PDF
      AN2659
      STM8 in-application programming (IAP) using a customized user-bootloader
      4.3
      279.98 KB
      PDF
      AN3298
      STM8S DALI slave library
      1.4
      391.05 KB
      PDF
      AN2646
      Smartcard interface with the STM8S microcontroller
      2.4
      442.01 KB
      PDF
      AN2781
      UART emulation software in STM8S and STM8A microcontrollers
      2.3
      100.94 KB
      PDF
      AN5178
      Using the GPIOs and interrupt controller to drive LEDs on STM8 Nucleo-64 boards
      1.0
      174.8 KB
      PDF
      AN5183

      Adjustable LED blinking speed using STM8 Nucleo-64 boards

      AN3277

      Adjustable buzzer frequency using STM8S-DISCOVERY touch sensing key

      AN3143

      Audio software codec for the STM8S

      AN2737

      Basic in-application programming example using the STM8 I²C and SPI peripherals

      AN5181

      Building a thermometer using the STM8 Nucleo-64 boards

      AN3260

      Building a thermometer using the STM8S-DISCOVERY

      AN5176

      Displaying variable voltage on a bar of LEDs using STM8 Nucleo-64 boards

      AN3280

      Displaying variable voltage on a bar of LEDs using STM8S-DISCOVERY

      AN5180

      Generating PWM signals using STM8 Nucleo-64 boards

      AN3332

      Generating PWM signals using STM8S-DISCOVERY

      AN3181

      Guidelines for obtaining UL/CSA/IEC 60730-1/60335-1 Class B certification in any STM8 application

      AN3265

      Handling hardware and software failures with the STM8S-DISCOVERY

      AN5182

      Image viewer based on the Adafruit® TFT shield with STM8 Nucleo-64 boards

      AN2719

      Precision improvement techniques for the A/D converter of the STM8 microcontroller

      AN5179

      RS232 communications with a terminal using the STM8 Nucleo-64 boards

      AN3259

      RS232 communications with a terminal using the STM8S-DISCOVERY

      AN2780

      Real-time keeping on STM8S and STM8A devices and usage of auto-wakeup unit (AWU) and beeper

      AN2927

      Resistor-Capacitor (RC) acquisition principle for STM8 touch sensing applications

      AN2659

      STM8 in-application programming (IAP) using a customized user-bootloader

      AN3298

      STM8S DALI slave library

      AN2646

      Smartcard interface with the STM8S microcontroller

      AN2781

      UART emulation software in STM8S and STM8A microcontrollers

      AN5178

      Using the GPIOs and interrupt controller to drive LEDs on STM8 Nucleo-64 boards

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      stm8s OrCad Symbol and Footprint files 1.5
      3.39 MB
      ZIP

      stm8s OrCad Symbol and Footprint files

Presentations & Training Material

    • Description Version Size Action
      STM32 and STM8 Functional Safety Packages 3.2
      1.38 MB
      PDF
      STM32 and STM8 embedded software solutions 7.0
      3.12 MB
      PDF

      STM32 and STM8 Functional Safety Packages

      STM32 and STM8 embedded software solutions

Publications and Collaterals

    • Description Version Size Action
      Get ready for the largest IoT development ecosystem 19.01
      629.13 KB
      PDF
      STM8CubeMX eases STM8 configuration 19.01
      1.21 MB
      PDF

      Get ready for the largest IoT development ecosystem

      STM8CubeMX eases STM8 configuration

    • Description Version Size Action
      STM8 8-bit MCU family 18.10
      3.47 MB
      PDF

      STM8 8-bit MCU family

Quality & Reliability

    • Description Version Size Action
      VDE certification for STM8S ClassB f/w 1.0
      1.81 MB
      PDF
      VDE certification for STM8S ClassB f/w 1.0
      1.81 MB
      PDF

      VDE certification for STM8S ClassB f/w

      VDE certification for STM8S ClassB f/w

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM8S105K4B6
Active
PDIP 32 .4S Industrial Ecopack2
STM8S105K4T3C
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S105K4T3CTR
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S105K4T6C
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S105K4T6CTR
Active
LQFP 32 7x7x1.4 Industrial Ecopack2
STM8S105K4U3A
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S105K4U3ATR
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S105K4U6A
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2
STM8S105K4U6ATR
Active
UFQFPN 32 5x5x0.55 Industrial Ecopack2

STM8S105K4B6

Package:

PDIP 32 .4S

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PDIP 32 .4S

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4T3C

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4T3CTR

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4T6C

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4T6CTR

Package:

LQFP 32 7x7x1.4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

LQFP 32 7x7x1.4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4U3A

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4U3ATR

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4U6A

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STM8S105K4U6ATR

Package:

UFQFPN 32 5x5x0.55

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFQFPN 32 5x5x0.55

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.