Item specifics
Description
The STM8S208C8T6 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 2 KB true data EEPROM (endurance: 300k write/erase cycles — 3x the typical industry standard). On-chip peripherals include a 10-bit ADC (up to 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-48 (7×7×1.4 mm) with 38 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.
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, 2 KB true data EEPROM (300k write/erase cycles) 10-bit ADC: Up to 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-48 Package: 7×7×1.4 mm, 38 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
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; 48-pin solution
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: 2 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 48-Pin Classic Package: LQFP-48 (7×7 mm) — balanced I/O density and package size in the STM8S20 performance line, well-suited for mainstream industrial designs 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:
What is the STM8S208C8T6 and what are its key specifications?
The STM8S208C8T6 is a high‑performance 8‑bit microcontroller from STMicroelectronics, built around the advanced 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. On‑chip peripherals include a 10‑bit ADC, a motor‑control timer (TIM1) with 3 complementary PWM pairs, a CAN 2.0B controller, multiple USART/SPI/I2C interfaces, and an embedded single‑wire debug module (SWIM). Housed in an LQFP‑48 package, it provides 38 I/O pins and operates over ‑40 °C to +85 °C. This MCU combines a large memory footprint, robust communication (including CAN), and three‑phase motor control, making it an excellent choice for industrial, automotive, and complex consumer applications.
What are the package dimensions and I/O count of the STM8S208C8T6?
The device uses an LQFP‑48 package measuring 7 mm × 7 mm with a lead pitch of 0.5 mm. It delivers 38 general‑purpose I/O pins, which is an excellent pin‑to‑package ratio for a 48‑pin MCU. The 0.5 mm pitch is standard for LQFP‑48 and supports manual soldering with a fine‑tip iron, while also being fully compatible with automated SMT assembly lines.
How does the STM8S208C8T6 differ from the STM8S208C6T6? Which one should I choose?
Both share exactly the same STM8 core at 24 MHz, 6 KB SRAM, 2 KB EEPROM, identical peripherals (including CAN and TIM1), and the same LQFP‑48 package. The only difference is the Flash size: the C8T6 provides 64 KB of Flash, while the C6T6 offers 32 KB. If your firmware fits comfortably in 32 KB, the C6T6 is a perfectly suitable and more cost‑optimized option. Choose the C8T6 when you need the extra code space for larger application software, protocol stacks (e.g., CANopen), or future feature updates — all without any PCB layout changes.
How does the STM8S208C8T6 compare with a basic STM8S105 series MCU? What are the main advantages?
The STM8S105K4T6, for example, offers 16 KB Flash, 2 KB SRAM, and 1 KB EEPROM, and it lacks a CAN controller. The STM8S208C8T6 is a significant upgrade: it provides four times the Flash (64 KB), three times the SRAM (6 KB), double the EEPROM (2 KB), and adds a fully featured CAN 2.0B interface as well as the advanced three‑phase control timer TIM1. If your application requires reliable networking (CAN bus), larger data buffers, or motor drive capability, the STM8S208C8T6 is the clear choice, while still offering the same 5 V ruggedness and the familiar STM8 ecosystem.
Does the STM8S208C8T6 include a CAN interface? What CAN protocol does it support?
Yes, the STM8S208C8T6 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 features 3 transmit mailboxes, 2 receive FIFOs (with 3 stages each), and hardware filtering. This makes the chip ideal for automotive and industrial CAN networks. The CAN peripheral is memory‑mapped and can be used with standard CAN protocol stacks (such as CANopen) to implement robust, multi‑node communication with very little CPU overhead.
Can the STM8S208C8T6 drive a three‑phase brushless motor directly?
Yes, it is well‑suited for this. The advanced 16‑bit timer TIM1 provides three complementary PWM pairs with programmable dead‑time insertion and a dedicated break input. This means the MCU can directly control a three‑phase inverter or a brushless DC motor half‑bridge without external dead‑time generation logic. Combined with the 10‑bit ADC for current/voltage sensing, the STM8S208C8T6 can implement sensorless or sensored field‑oriented control (FOC) for compact motor drives in power tools, fans, pumps, and industrial actuators.
What are the ADC specifications of the STM8S208C8T6? How many analog input channels can I use?
The integrated 10‑bit successive‑approximation ADC features a fast conversion time and low power consumption. Internally it supports up to 16 multiplexed external input channels. In the LQFP‑48 package, the actual number of available analog inputs depends on how many pins are shared with digital peripherals, but you can typically access 10 to 12 analog channels. The ADC can also measure an internal voltage reference, and its conversion can be triggered by the motor‑control timer for synchronized sampling.
What is the supply voltage range of the STM8S208C8T6? Can it be powered directly from 5 V?
Yes, it is a true 5 V‑capable device. The operating supply range is 2.95 V to 5.5 V, allowing the MCU to be powered directly from a standard 5 V rail, a USB port, or an unregulated adapter without requiring an external regulator. All I/O pins are 5 V tolerant and can interface directly with TTL, CMOS, or 5 V logic, making the chip very easy to integrate into legacy designs and noisy industrial environments.
How low is the power consumption, and what low‑power modes does the STM8S208C8T6 support?
In Run mode at 24 MHz, the typical current consumption is around 4.5 mA. The chip offers several power‑saving modes: Wait mode (CPU off, peripherals on), Active‑halt mode (with wake‑up by an internal AWU timer or external interrupt), and Halt mode, where the current drops to less than 1 µA. The independent watchdog (IWDG) and the auto‑wake‑up unit (AWU) stay functional even in Active‑halt, allowing periodic wake‑ups for battery‑powered sensor nodes. For extremely low‑power designs, the STM8L series with dedicated sub‑µA modes may be more appropriate, but for many industrial and CAN‑connected applications the S208 offers an excellent balance of performance and power.
How do I program and debug the STM8S208C8T6? What development tools are needed?
Programming and debugging are done via the single‑wire SWIM interface, which requires only one pin (plus reset and ground). A low‑cost ST‑LINK/V2 programmer/debugger is the standard hardware tool. 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 comprehensive standard peripheral libraries that accelerate driver development. Many application notes and reference designs for motor control, CAN networking, and sensor acquisition are available, helping you move from concept to a working prototype very quickly.
What are the most typical applications for the STM8S208C8T6?
Thanks to its large memory, CAN connectivity, three‑phase motor control, and 5 V ruggedness, the STM8S208C8T6 is widely used in industrial automation (sensor nodes, motor drives), automotive subsystems (body controllers, lighting, small actuator ECUs), home appliances (washing machines, dishwashers), power tools, and building control. It is an especially good fit for CAN‑based distributed control systems where a reliable, low‑cost, and easy‑to‑design MCU is required.