STM8S207CBT6 ST Mainstream Performance Line 8-bit MCU 128KB Flash 24MHz CPU EEPROM CAN LQFP-48

STM8S207CBT6 Product Overview

The STM8S207CBT6 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 128 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 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.[reference:1]

STM8S207CBT6 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: 128 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

STM8S207CBT6 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; 48-pin solution

STM8S207CBT6 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: 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 Large Memory Capacity: 128 KB Flash + 6 KB RAM + 2 KB EEPROM for complex protocol stacks (e.g., CANopen) and algorithms, doubling the Flash capacity of S207C8T6 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 STM8S207CBT6 and its key specifications?
   The STM8S207CBT6 is a high‑performance 8‑bit microcontroller from STMicroelectronics, built around the STM8 core at up to 24 MHz. It provides 128 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, and USART/SPI/I2C interfaces. Housed in an LQFP‑48 package, it offers 38 I/O pins and operates over ‑40 °C to +85 °C.

2. How does the STM8S207CBT6 differ from the STM8S207C8T6?
   Both MCUs share the same core, package, SRAM, EEPROM, and peripherals (CAN, TIM1, ADC). The only difference is Flash memory size: the CBT6 has 128 KB of Flash, while the C8T6 has 64 KB. If your application fits in 64 KB, the C8T6 is a cost‑effective choice. Choose the CBT6 when you need double the code space for larger firmware, complex protocol stacks, or future upgrades — no PCB changes are required.

3. Does the STM8S207CBT6 have a CAN bus interface?
   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 and 2 receive FIFOs. This makes the chip ideal for real‑time industrial and automotive CAN networks.

4. Can the STM8S207CBT6 drive a brushless DC motor directly?
   Yes. The advanced timer TIM1 provides 3 complementary PWM pairs with programmable dead‑time insertion and a break input. This allows the MCU to directly control a three‑phase inverter or a BLDC motor half‑bridge without external dead‑time logic. It is widely used in fans, pumps, power tools, and home appliances.

5. What are the ADC specifications and how many analog channels are available on the STM8S207CBT6?
   The integrated 10‑bit successive‑approximation ADC supports up to 16 multiplexed analog input channels. In the LQFP‑48 package, typically 10 to 12 external channels are available depending on digital pin usage. The ADC can also measure an internal voltage reference and can be triggered by the motor‑control timer for synchronized current sampling.

6. How much memory does the STM8S207CBT6 have?
   It features 128 KB of Flash program memory, 6 KB of SRAM, and 2 KB of true data EEPROM. This generous memory size for an 8‑bit MCU comfortably handles communication stacks, motor‑control algorithms, and complex application logic.

7. What package and I/O count does the STM8S207CBT6 use?
   The MCU comes in an LQFP‑48 package (7 mm × 7 mm, 0.5 mm lead pitch) and provides 38 general‑purpose I/O pins. This package offers a good balance between compact size and rich connectivity for mid‑complexity designs.

8. Can the STM8S207CBT6 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, simplifying interfaces with legacy TTL/CMOS logic.

9. How to program and debug the STM8S207CBT6?
   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 STM8S207CBT6?
    Thanks to its large Flash, CAN connectivity, and three‑phase motor‑control timer, the STM8S207CBT6 is popular in industrial automation (CAN nodes, motor drives), automotive body electronics, home appliances, power tools, and building automation. It is a strong fit for distributed control systems that need a proven 8‑bit MCU with plenty of code space.