STM8S207S8T6C ST Mainstream Performance Line 8-bit MCU 64KB Flash 24MHz CPU EEPROM CAN LQFP-44

STM8S207S8T6C Product Overview

The STM8S207S8T6C is a mainstream performance line 8-bit MCU from STMicroelectronics, classified as a high-density device in the STM8S20x family. Featuring a 24 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline, it delivers up to 20 MIPS (0 wait states at fCPU ≤ 16 MHz). It integrates 64 KB Flash, 6 KB RAM, and 1.5 KB true data EEPROM (endurance: 300k write/erase cycles — 3x the typical industry standard). On-chip peripherals include a 10-bit ADC (16 channels with analog watchdog), high-speed 1 Mbit/s beCAN 2.0B interface, 16-bit advanced control timer (4 CAPCOM channels, 3 complementary outputs with dead-time insertion), two 16-bit general-purpose timers (total 5 CAPCOM channels), 8-bit basic timer, auto wakeup timer, dual watchdogs, and two UARTs (one with LIN 2.1 master/slave and automatic resynchronization), SPI (up to 10 Mbit/s), and I2C (up to 400 Kbit/s) interfaces. Packaged in LQFP-44 (10×10×1.45 mm) with 34 I/Os and highly robust I/O design immune against current injection, it operates from 2.95 V to 5.5 V over -40 °C to 85 °C. Ideal for industrial automation, automotive control, motor drive, CAN bus communication, and applications demanding high performance and reliability.

STM8S207S8T6C Core Features

Advanced Core: 24 MHz STM8 core, Harvard architecture, 3-stage pipeline, extended instruction set, up to 20 MIPS @ 24 MHz, up to 37 external interrupts, 32 nested interrupts Memory: 64 KB Flash (20-year data retention at 55 °C after 10k cycles), 6 KB RAM, 1.5 KB true data EEPROM (300k write/erase cycles) 10-bit ADC: 16 multiplexed channels, ±1 LSB accuracy, scan mode and analog watchdog CAN 2.0B Bus: High-speed 1 Mbit/s beCAN 2.0B interface for industrial fieldbus communication Advanced Control Timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization General-Purpose Timers: 2x 16-bit, total 5 CAPCOM channels (IC/OC/PWM); 8-bit basic timer with 8-bit prescaler Auto Wakeup Timer: Wakeup from Active-halt mode Dual Watchdogs: Window watchdog + Independent watchdog with separate clock source Communication Interfaces: 2x UART (LIN 2.1 master/slave/auto resync + clock output), SPI up to 10 Mbit/s, I2C up to 400 Kbit/s Clock System: 4 master clock sources (external clock, low-power crystal oscillator, user-trimmable 16 MHz RC, low-power 128 kHz RC), clock security system with monitor Low-Power Modes: Wait, Active-halt, Halt; individually switchable peripheral clocks High Reliability: Low-consumption POR/PDR, highly robust I/O design immune against current injection, 96-bit unique ID per device LQFP-44 Package: 10×10×1.45 mm, 34 I/Os Wide Operating Range: 2.95 V to 5.5 V, -40 °C to 85 °C Development Support: Embedded SWIM single-wire interface for fast on-chip programming and non-intrusive debugging

STM8S207S8T6C Applications

Industrial Automation: PLCs, frequency inverters, sensor transmitters, RS-485/CAN communication nodes Automotive Electronics: Body control modules, window/light control, automotive sensor nodes (non-safety-critical), CAN bus modules Motor Control: BLDC motors, servo motors, fans, pumps; advanced timer with complementary PWM and dead-time LED Lighting: Dimming control, RGB strips, switching power supplies; direct PWM drive Battery Management: Protection boards, fuel gauges, charge management; low-power modes reduce standby consumption Smart Metering: Electricity, water, gas meters; integrated EEPROM for calibration parameters Home Appliances: Induction/microwave oven panels, small appliance main controllers Consumer Electronics: High-performance remote controls, electric toothbrushes, electronic toys; 44-pin solution

STM8S207S8T6C Key Advantages

Integrated CAN Bus: Built-in high-speed 1 Mbit/s beCAN 2.0B interface eliminates external CAN controller/transceiver ICs, reducing system BOM cost 300k High-Endurance EEPROM: 1.5 KB true data EEPROM with 300k write/erase cycles (3x standard endurance), reliably storing calibration parameters and operation logs 24 MHz High Performance: 24 MHz STM8 core delivering up to 20 MIPS (0 wait states at fCPU ≤ 16 MHz) for complex control algorithms and real-time communication Dual UART + LIN 2.1: Two UARTs including LIN 2.1 master/slave with automatic resynchronization, ideal for industrial communication and automotive bus systems High-Speed SPI: SPI interface up to 10 Mbit/s (2.5x faster than Value Line), meeting high-speed peripheral communication needs Advanced Timer for Motor Control: 4 CAPCOM channels, 3 complementary outputs with dead-time insertion, driving half-bridge/full-bridge circuits and motor control 44-Pin Compact Package: LQFP-44 (10×10 mm) — the balanced pin-count option in the S207 family with CAN bus and 34 I/Os, ideal for designs requiring both space efficiency and I/O density Robust & Reliable: 4 clock sources + clock security system, low-consumption POR/PDR, independent watchdog with separate clock source Mature Ecosystem: STM8 classic architecture, rich documentation, low-cost SWIM debug, shortening development cycles

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FAQ:

1. What is the STM8S207S8T6C and what are its key specifications?
   The STM8S207S8T6C is a high‑performance 8‑bit microcontroller from STMicroelectronics, built around the advanced STM8 core running at up to 24 MHz. It provides 64 KB of Flash program memory, 6 KB of SRAM, and 2 KB of true data EEPROM. Integrated peripherals include a 10‑bit ADC, a motor‑control timer (TIM1) with 3 complementary PWM pairs, a full CAN 2.0B controller, multiple UART/SPI/I2C interfaces, and the single‑wire SWIM debug interface. Housed in an LQFP‑44 package, it provides 34 I/O pins and operates over ‑40 °C to +85 °C. This MCU combines generous memory, CAN connectivity, and three‑phase motor control, making it a robust solution for industrial, automotive, and smart appliance applications.

2. What are the package dimensions and I/O count of the STM8S207S8T6C?
   The device uses an LQFP‑44 package measuring 10 mm × 10 mm with a lead pitch of 0.8 mm. It delivers 34 general‑purpose I/O pins, which offers a good balance between functionality and board space for mid‑complexity designs. The 0.8 mm pitch makes manual soldering and visual inspection very practical, even for prototyping and small‑volume production.

3. How does the STM8S207S8T6C differ from the STM8S208C8T6? Which one should I choose?
   Both share the same 24 MHz STM8 core, 64 KB Flash, 6 KB SRAM, 2 KB EEPROM, and identical core peripherals — the CAN 2.0B controller and the motor‑control timer TIM1 with three complementary PWM pairs. The main difference is the package and I/O count: the S207 comes in an LQFP‑44 package with 34 I/Os, while the S208 uses an LQFP‑48 with 38 I/Os. The S208 may also offer an extra UART or a few additional timer channels depending on the exact part number. Choose the S207 when 34 I/Os are sufficient and a slightly smaller 44‑pin footprint is preferred, or when you want a very competitive price for a CAN‑enabled, motor‑control MCU. Choose the S208 when you need those extra I/O lines or the additional communication peripherals.

4. How does the STM8S207S8T6C compare with the STM8S105K4T6? Is it a major upgrade?
   Yes, it is a significant step up. The STM8S105K4T6 offers 16 KB Flash, 2 KB SRAM, 1 KB EEPROM, and lacks both a CAN interface and the advanced TIM1 timer. The STM8S207S8T6C provides four times the Flash (64 KB), three times the SRAM (6 KB), double the EEPROM (2 KB), and adds a full CAN 2.0B controller plus a three‑phase motor‑control timer. If your design needs CAN networking, larger firmware, or direct motor drive capability, the S207 is a clear and cost‑effective upgrade path while staying in the familiar STM8 family.

5. Does the STM8S207S8T6C include a CAN interface? What CAN features does it support?
   Yes, it integrates a full beCAN 2.0B active controller. It supports standard (11‑bit) and extended (29‑bit) identifiers, data rates up to 1 Mbit/s, and includes 3 transmit mailboxes, 2 receive FIFOs (each 3‑stage), and scalable hardware filtering. This makes the chip ideal for real‑time CAN networks in industrial automation, automotive body control, and building management. Standard CAN stacks such as CANopen can easily be integrated, requiring very little CPU overhead.

6. Can the STM8S207S8T6C drive a three‑phase brushless motor directly?
   Absolutely. The advanced 16‑bit timer TIM1 provides three complementary PWM pairs with programmable dead‑time insertion and a dedicated break input. This allows the MCU to directly control a three‑phase inverter or a brushless DC motor half‑bridge without external dead‑time logic. Together with the 10‑bit ADC for current/voltage sensing, the STM8S207S8T6C is well‑suited for compact motor drives in fans, pumps, power tools, and home appliances.

7. What are the ADC specifications of the STM8S207S8T6C? How many analog input channels can I use?
   The integrated 10‑bit successive‑approximation ADC offers fast conversion and low noise. Internally it supports up to 16 multiplexed analog input channels. In the LQFP‑44 package, after accounting for shared digital functions, you can typically access 10 to 12 external analog inputs. The ADC can also measure an internal voltage reference and can be triggered by the motor‑control timer for synchronized sampling, which is very useful for motor current measurement.

8. What is the supply voltage range of the STM8S207S8T6C? Can it be powered directly from 5 V?
   Yes, it is a true 5 V‑capable microcontroller. The operating range is 2.95 V to 5.5 V, so you can power it directly from a standard 5 V rail, a USB supply, or a loosely regulated adapter. All I/O pins are 5 V tolerant and can interface seamlessly with 5 V TTL or CMOS logic, making the S207 very easy to integrate into industrial environments and legacy designs.

9. How low is the power consumption of the STM8S207S8T6C, and what low‑power modes are available?
   In Run mode at 24 MHz, the typical current draw is around 4.5 mA. The chip supports Wait, Active‑halt, and Halt modes. In Halt mode the consumption drops to less than 1 µA, making it suitable for battery‑backed or intermittent‑operation devices. The independent watchdog (IWDG) and auto‑wake‑up unit (AWU) remain active in Active‑halt mode, allowing periodic wake‑ups without an external oscillator. For ultra‑low‑power applications the STM8L series may be more appropriate, but the S207 provides an excellent balance of performance and power for CAN‑connected and motor‑driven equipment.

10. How do I program and debug the STM8S207S8T6C? What development tools are needed?
    All programming and debugging use the SWIM (Single Wire Interface Module) — a single‑pin debug interface. A low‑cost ST‑LINK/V2 is the standard debugger/programmer. For firmware development you can use the free STVD (ST Visual Develop) IDE with the Cosmic C compiler or the open‑source SDCC compiler. ST provides extensive standard peripheral libraries that dramatically speed up driver development. Many application notes and reference designs for CAN networking, motor control, and sensor acquisition are available, helping you go from idea to prototype very quickly.

11. What are the most typical applications for the STM8S207S8T6C?
    Thanks to its large memory, CAN connectivity, three‑phase motor‑control timer, and 5 V ruggedness, the S207 is widely used in industrial automation (CAN sensor/actuator nodes, motor drives), automotive subsystems (lighting, body control modules, small ECUs), home appliances (washing machines, dishwashers), power tools, and building automation. It is especially popular where a proven, easy‑to‑design 8‑bit MCU with CAN and motor control is needed, without the extra I/O of a 48‑pin package.