STM8S207R8T6 ST Mainstream Performance Line 8-bit MCU 64KB Flash 24MHz CPU EEPROM CAN LQFP-64

STM8S207R8T6 Product Overview

The STM8S207R8T6 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-64 (10×10×1.4 mm) with 52 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.

STM8S207R8T6 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-64 Package: 10×10×1.4 mm, 52 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

STM8S207R8T6 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; 64-pin solution

STM8S207R8T6 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 52 I/O High Integration: LQFP-64 package provides 52 I/Os, meeting complex system multi-peripheral connectivity needs 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 STM8S207R8T6 and its key specifications?
   The STM8S207R8T6 is a high‑performance 8‑bit microcontroller from STMicroelectronics based on the STM8 core running at up to 24 MHz. It offers 64 KB of Flash program memory, 6 KB of SRAM, and 2 KB of true data EEPROM. Key peripherals include a 10‑bit ADC with up to 16 channels, an advanced motor‑control timer (TIM1) with 3 complementary PWM pairs, a full CAN 2.0B interface, and USART/SPI/I2C communication. Housed in an LQFP‑64 package, it provides 52 I/O pins and operates over ‑40 °C to +85 °C.

2. What is the difference between STM8S207R8T6 and STM8S207RBT6?
   Both MCUs share the same core, package, SRAM, EEPROM, and peripherals (CAN, TIM1, ADC). The only difference is Flash memory size: the R8T6 has 64 KB of Flash, while the RBT6 doubles that to 128 KB. If your application fits comfortably in 64 KB, the R8T6 is a highly cost‑optimized choice. If you need more code space for complex firmware or future updates, the RBT6 offers extra headroom without any PCB changes.

3. Does the STM8S207R8T6 have a CAN bus interface?
   Yes, it integrates a full beCAN 2.0B active controller. It supports both standard 11‑bit and extended 29‑bit identifiers, data rates up to 1 Mbit/s, and includes 3 transmit mailboxes and 2 receive FIFOs. This makes the chip well‑suited for industrial and automotive CAN networks.

4. Can the STM8S207R8T6 drive a brushless DC (BLDC) motor directly?
   Yes. The advanced timer TIM1 provides 3 complementary PWM pairs with programmable dead‑time insertion and a break input. This allows direct control of a three‑phase inverter or a BLDC motor half‑bridge without external dead‑time logic. It is commonly used in fans, pumps, power tools, and home appliances.

5. What are the ADC specifications of the STM8S207R8T6? How many analog channels are available?
   The integrated 10‑bit successive‑approximation ADC supports up to 16 external analog input channels in the LQFP‑64 package. The ADC can also measure an internal voltage reference and can be triggered by the motor‑control timer for synchronized current sensing.

6. How much memory does the STM8S207R8T6 have?
   It features 64 KB of Flash program memory, 6 KB of SRAM, and 2 KB of true data EEPROM. This is a well‑balanced memory configuration for a wide range of 8‑bit applications, including communication stacks and motor‑control algorithms.

7. What package does the STM8S207R8T6 use and how many I/O pins are there?
   The MCU comes in an LQFP‑64 package (10 mm × 10 mm, 0.5 mm lead pitch) and provides 52 general‑purpose I/O pins. The generous I/O count suits sensor‑intensive and connectivity‑heavy designs.

8. Can the STM8S207R8T6 be powered directly from 5 V?
   Yes, it is a true 5 V‑capable microcontroller. The operating voltage range is 2.95 V to 5.5 V, so it can be powered directly from a standard 5 V rail, USB, or a loosely regulated supply. All I/Os are 5 V tolerant.

9. How to program and debug the STM8S207R8T6?
   Programming and debugging use the single‑wire SWIM interface. A low‑cost ST‑LINK/V2 is the standard tool. Firmware can be developed with STVD + Cosmic C or the open‑source SDCC compiler. ST provides standard peripheral libraries to speed up development.

10. What are the typical applications of the STM8S207R8T6?
    It is widely used in industrial automation (CAN sensor/actuator nodes, motor drives), automotive body electronics, home appliances, power tools, and building automation. Its CAN connectivity, motor‑control timer, and generous I/O count make it an excellent fit for distributed control systems.