STMicroelectronics STM8S207CBT3

Overview

STM8S207CBT3 from STMicroelectronics is an 8-bit high-performance microcontroller featuring a Harvard-architecture STM8 core, 24 MHz max CPU frequency, 128 KB Flash, 2 KB data EEPROM, 10-bit ADC with 16 channels, two UARTs (one CAN-capable), SPI, I²C, and integrated CAN 2.0B controller - deployed in automotive body control modules, industrial sensor nodes, and smart appliance motor control.

For engineers reviewing the STM8S207CBT3 datasheet, STM8S207CBT3 pinout, STM8S207CBT3 application, or STM8S207CBT3 equivalent, key selection criteria include CAN bus integration, SWIM single-wire debug support, 16-channel analog input capability, low-power active-halt mode (0.35 µA typical), and LQFP48 package compatibility with legacy STM8S footprint constraints.

Technical Context

The STM8S207CBT3 implements a 3-stage pipelined Harvard-architecture core with extended instruction set and nested interrupt controller supporting 32 interrupts and up to 37 external IRQs across 6 vectors. Its clock system integrates dual RC oscillators (16 MHz user-trimmable HSI and 128 kHz LSI), crystal oscillator support, and clock security monitoring.

Peripheral subsystems include an advanced 16-bit TIM1 timer with dead-time insertion and complementary outputs for motor control, two general-purpose 16-bit timers (TIM2/TIM3), an 8-bit basic timer (TIM4), beCAN 2.0B interface operating at 1 Mbit/s, and UARTs supporting LIN 2.1 master/slave with automatic resynchronization.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), 48-pin quad flat lead-free package with exposed thermal pad; RoHS-compliant, rated for industrial temperature range (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with STM8S208CBT3, the STM8S207CBT3 reduces cost and code size for CAN-centric applications without sacrificing timer or ADC capability; versus STM32F042F6P6, it delivers lower-power, simpler CAN implementation but lacks USB and 32-bit performance headroom.

Availability

STM8S207CBT3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor interfaces, smart appliance control panels, and wireless sensor node hubs requiring stable component supply across extended product lifecycles.

Supply support for STM8S207CBT3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM8S series targets cost-sensitive, high-reliability 8-bit embedded applications demanding robust peripherals, ultra-low-power operation, and long-term supply stability - especially in automotive body electronics and white goods.

FAQ

Does STM8S207CBT3 support in-circuit debugging via SWIM without external hardware?

Yes. The STM8S207CBT3 uses a Single Wire Interface Module (SWIM) that operates over the NRST pin only, enabling full-speed programming, breakpoint setting, and register inspection without JTAG headers or dedicated debug pins. A standard ST-LINK/V2 adapter is required for host connection, but no target-side circuitry beyond NRST pull-up and decoupling is needed.

What is the maximum achievable CAN bit rate and under what conditions?

The STM8S207CBT3's beCAN controller supports up to 1 Mbit/s with proper bus termination and transceiver selection. At 24 MHz fCPU, the CAN prescaler allows exact timing for standard bit rates including 125 kbit/s (automotive comfort networks), 250 kbit/s (powertrain diagnostics), and 500 kbit/s (body control), all verified per ISO 11898-1 with sample point ≥75% and SJW ≤1.

Can the 2 KB data EEPROM be used for storing calibration coefficients during production test?

Yes. The 2 KB true data EEPROM is independently erasable and writable under firmware control, with guaranteed 300,000 write/erase cycles and 20-year data retention at 55 °C. It supports byte-level writes and is accessible during normal program execution - making it ideal for storing factory-calibrated sensor offsets, motor winding resistance values, or unique device identifiers.

How does the advanced TIM1 timer support 3-phase BLDC motor commutation?

TIM1 provides three complementary PWM outputs with programmable dead-time insertion (1–1023 ns), synchronized update events, and hardware break input for emergency shutdown. Its four capture/compare channels can generate six-step commutation signals, while the ADC trigger output synchronizes current sampling to PWM center-aligned periods - eliminating software timing jitter in torque control loops.