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The STM8S20xxx performance line 8-bit microcontrollers offer from 32 to 128 Kbytes Flash program memory. They are referred to as high-density devices in the STM8S microcontroller family reference manual.
All STM8S20xxx devices provide the following benefits: reduced system cost, performance 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 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.
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 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.Key Features
- Core
- Max fCPU: up to 24 MHz, 0 wait states @ fCPU≤ 16 MHz
- Advanced STM8 core with Harvard architecture and 3-stage pipeline
- Extended instruction set
- Max 20 MIPS @ 24 MHz
- Memories
- Program: up to 128 Kbytes Flash; data retention 20 years at 55 °C after 10 kcycles
- Data: up to 2 Kbytes true data EEPROM; endurance 300 kcycles
- RAM: up to 6 Kbytes
- Clock, reset and supply management
- 2.95 to 5.5 V operating voltage
- 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
- Wait, active-halt, & halt low power modes
- Peripheral clocks switched off 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
- 2x 16-bit general purpose timers, with 2+3 CAPCOM channels (IC, OC or PWM)
- Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization
- 8-bit basic timer with 8-bit prescaler
- Auto wakeup timer
- Window watchdog, independent watchdog
- Communications interfaces
- High speed 1 Mbit/s active beCAN 2.0B
- UART with clock output for synchronous operation - LIN master mode
- UART with LIN 2.1 compliant, master/slave modes and automatic resynchronization
- SPI interface up to 10 Mbit/s
- I2C interface up to 400 Kbit/s
- 10-bit ADC with up to 16 channels
- I/Os
- Up to 68 I/Os on an 80-pin package including 18 high sink outputs
- Highly robust I/O design, immune against current injection
- Development support
- Single wire interface module (SWIM) and debug module (DM)
- 96-bit unique ID key for each device
- Core
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Sample & Buy
| Part Number | Package | Packing Type | Temperature (°C) | Marketing Status | ECCN (US) | Country of Origin | Budgetary Price (US$)*/Qty | Order from ST | Order from Distributors | |
|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||
| STM8S207R8T3TR | LQFP 64 10x10x1.4 | Tape And Reel | -40 | 125 | Active | EAR99 | CHINA | 1.2019 / 10k | Buy now | Check Availability |
| STM8S207R8T6CTR | LQFP 64 14x14x1.4 | Tape And Reel | -40 | 85 | Active | EAR99 | MALAYSIA | 1.1631 / 10k | Buy now | Check Availability |
| STM8S207R8T6TR | LQFP 64 10x10x1.4 | Tape And Reel | -40 | 85 | Active | EAR99 | MALAYSIA | 1.0451 / 10k | Buy now | No availability of distributors reported, please contact our sales office |
| STM8S207R8T6 | LQFP 64 10x10x1.4 | Tray | -40 | 85 | Active | EAR99 | MALAYSIA | 1.0451 / 10k | Buy now | Check Availability |
| STM8S207R8T3 | LQFP 64 10x10x1.4 | Tray | -40 | 125 | Active | EAR99 | CHINA | 1.2019 / 10k | Buy now | Check Availability |
| STM8S207R8T6C | LQFP 64 14x14x1.4 | Tray | -40 | 85 | Active | EAR99 | MALAYSIA | 1.1631 / 10k | Buy now | Check Availability |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
Featured Videos
We asked Christophe the following questions: - How is ST engaged in the 8-bit MCU market ? - What benefits does the STM8 bring? - What applications are suitable for STM8 (no change) - What kind of ecosystem does STM8 have?
8-bit microcontrollers for industrial and mass-market applications
Here is an opportunity to get to learn the basics of our STM8S value line !
Development Tools
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Picture Part number Manufacturer Description CYCLONE P&E Microcomputer Systems Automated, Stand-Alone Production Programmer, Debug & Test. CYCLONE FX P&E Microcomputer Systems Automated, Stand-Alone Production Programmer, Debug & Test. 
FlashPro Elprotronic Flash programmer for STM8 and ARM based MCUs. 
GangPro Elprotronic Gang programmer for STM8 and ARM based MCUs. 
ST-LINK/V2 ST ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 
STLINK-V3SET ST STLINK-V3 modular in-circuit debugger and programmer for STM32/STM8 Part NumberAutomated, Stand-Alone Production Programmer, Debug & Test.
Automated, Stand-Alone Production Programmer, Debug & Test.
Flash programmer for STM8 and ARM based MCUs.
Gang programmer for STM8 and ARM based MCUs.
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32
STLINK-V3 modular in-circuit debugger and programmer for STM32/STM8
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Picture Part number Manufacturer Description CXSTM8 Cosmic Software C Compiler and associated tools for the STM8 family FLASHER-STM8 ST STM8 Flash loader demonstrator (UM0462) IAR C-STAT IAR Systems Static analysis tool; add-on product to IAR Embedded Workbench IAR Embedded Workbench for STM8 IAR Systems Integrated Development Environment. IAR Embedded Workbench for STM8 - Functional Safety IAR Systems Integrated Development Environment IAR Visual State IAR Systems State-machine modelling tool RIDE-STM8 Raisonance Raisonance branded integrated development environment for STM8 MCUs 
STM-STUDIO-STM8 ST STM Studio run-time variables monitoring and visualization tool for STM8 microcontrollers 
STM8CubeMX ST STM8Cube configuration and report tool STVD-STM8 ST ST Visual develop IDE for developing ST7 and STM8 applications STVP-LIB-STM8 ST STVP programming toolkit: C++ source files for creating PC programming interface STVP-STM8 ST ST Visual Programmer STM8 winIDEA-STM8 iSYSTEM iSYSTEM's complete software development and test solution for the STM8 MCUs Part NumberC Compiler and associated tools for the STM8 family
STM8 Flash loader demonstrator (UM0462)
Static analysis tool; add-on product to IAR Embedded Workbench
Integrated Development Environment.
Integrated Development Environment
State-machine modelling tool
Raisonance branded integrated development environment for STM8 MCUs
STM Studio run-time variables monitoring and visualization tool for STM8 microcontrollers
STM8Cube configuration and report tool
ST Visual develop IDE for developing ST7 and STM8 applications
STVP programming toolkit: C++ source files for creating PC programming interface
ST Visual Programmer STM8
iSYSTEM's complete software development and test solution for the STM8 MCUs
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Embedded Software
Evaluation Tools
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Picture Part number Manufacturer Description 
NUCLEO-8S207K8 ST STM8 Nucleo-32 development board with STM8S207K8 MCU, supports Arduino Nano connectivity 
NUCLEO-8S208RB ST STM8 Nucleo-64 development board with STM8S208RB MCU, supports Arduino Uno and ST morpho connectivity 
STM8/128-EVAL ST Evaluation board with STM8S208MB MCU 
STM8/128-MCKIT ST Motor control starter kit for STM8S (128KB flash) microcontrollers 
STM8S-DISCOVERY ST Discovery kit with STM8S105C6 MCU Part NumberSTM8 Nucleo-32 development board with STM8S207K8 MCU, supports Arduino Nano connectivity
STM8 Nucleo-64 development board with STM8S208RB MCU, supports Arduino Uno and ST morpho connectivity
Evaluation board with STM8S208MB MCU
Motor control starter kit for STM8S (128KB flash) microcontrollers
Discovery kit with STM8S105C6 MCU
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Support and Applications
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| STM8S207R8T3 | Active | LQFP 64 10x10x1.4 | Industrial | Ecopack2 | |
| STM8S207R8T3TR | Active | LQFP 64 10x10x1.4 | Industrial | Ecopack2 | |
| STM8S207R8T6 | Active | LQFP 64 10x10x1.4 | Industrial | Ecopack2 | |
| STM8S207R8T6C | Active | LQFP 64 14x14x1.4 | Industrial | Ecopack2 | |
| STM8S207R8T6CTR | Active | LQFP 64 14x14x1.4 | Industrial | Ecopack2 | |
| STM8S207R8T6TR | Active | LQFP 64 10x10x1.4 | Industrial | 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.
